/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:29:22,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:29:22,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:29:22,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:29:22,864 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 22:29:22,890 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:29:22,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:29:22,891 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:29:22,891 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:29:22,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:29:22,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:29:22,893 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:29:22,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:29:22,893 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:29:22,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:29:22,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:29:22,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:29:22,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:29:22,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:29:22,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:29:22,894 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:29:22,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:29:22,894 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:29:22,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:29:22,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:29:22,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:29:22,895 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:29:22,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:29:22,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:29:22,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:29:22,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:29:22,895 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:29:22,895 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:29:22,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:29:22,896 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:29:22,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:29:22,896 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:29:23,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:29:23,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:29:23,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:29:23,117 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:29:23,118 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:29:23,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1.wvr.bpl [2021-06-05 22:29:23,119 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1.wvr.bpl' [2021-06-05 22:29:23,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:29:23,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:29:23,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:29:23,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:29:23,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:29:23,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:29:23" (1/1) ... [2021-06-05 22:29:23,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:29:23" (1/1) ... [2021-06-05 22:29:23,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:29:23,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:29:23,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:29:23,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:29:23,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:29:23" (1/1) ... [2021-06-05 22:29:23,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:29:23" (1/1) ... [2021-06-05 22:29:23,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:29:23" (1/1) ... [2021-06-05 22:29:23,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:29:23" (1/1) ... [2021-06-05 22:29:23,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:29:23" (1/1) ... [2021-06-05 22:29:23,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:29:23" (1/1) ... [2021-06-05 22:29:23,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:29:23" (1/1) ... [2021-06-05 22:29:23,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:29:23,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:29:23,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:29:23,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:29:23,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:29:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:29:23,245 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:29:23,245 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:29:23,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:29:23,246 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:29:23,246 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:29:23,246 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:29:23,246 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:29:23,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:29:23,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:29:23,246 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 22:29:23,246 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 22:29:23,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 22:29:23,247 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 22:29:23,248 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 22:29:23,248 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 22:29:23,248 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 22:29:23,418 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:29:23,419 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-05 22:29:23,419 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 22:29:23,419 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 22:29:23,420 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 22:29:23,420 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-06-05 22:29:23,421 INFO L202 PluginConnector]: Adding new model parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:29:23 BoogieIcfgContainer [2021-06-05 22:29:23,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:29:23,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:29:23,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:29:23,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:29:23,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:29:23" (1/2) ... [2021-06-05 22:29:23,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff183db and model type parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:29:23, skipping insertion in model container [2021-06-05 22:29:23,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:29:23" (2/2) ... [2021-06-05 22:29:23,426 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-1.wvr.bpl [2021-06-05 22:29:23,430 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:29:23,430 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:29:23,430 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:29:23,431 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:29:23,483 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 22:29:23,498 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 22:29:23,510 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:29:23,511 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:29:23,511 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:29:23,511 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:29:23,511 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:29:23,511 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:29:23,511 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:29:23,511 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:29:23,517 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 29 transitions, 90 flow [2021-06-05 22:29:23,546 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 166 states, 164 states have (on average 3.7378048780487805) internal successors, (613), 165 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand has 166 states, 164 states have (on average 3.7378048780487805) internal successors, (613), 165 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:23,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:29:23,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:23,556 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:23,556 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:23,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:23,567 INFO L82 PathProgramCache]: Analyzing trace with hash -2029517161, now seen corresponding path program 1 times [2021-06-05 22:29:23,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:23,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529975174] [2021-06-05 22:29:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:23,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:23,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529975174] [2021-06-05 22:29:23,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529975174] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:29:23,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:29:23,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 22:29:23,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005043308] [2021-06-05 22:29:23,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:29:23,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:23,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:29:23,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:29:23,728 INFO L87 Difference]: Start difference. First operand has 166 states, 164 states have (on average 3.7378048780487805) internal successors, (613), 165 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:23,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:23,776 INFO L93 Difference]: Finished difference Result 324 states and 1218 transitions. [2021-06-05 22:29:23,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:29:23,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:29:23,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:23,788 INFO L225 Difference]: With dead ends: 324 [2021-06-05 22:29:23,788 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 22:29:23,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:29:23,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 22:29:23,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 204. [2021-06-05 22:29:23,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 3.7339901477832513) internal successors, (758), 203 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 758 transitions. [2021-06-05 22:29:23,831 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 758 transitions. Word has length 15 [2021-06-05 22:29:23,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:23,832 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 758 transitions. [2021-06-05 22:29:23,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:23,832 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 758 transitions. [2021-06-05 22:29:23,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:29:23,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:23,834 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:23,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:29:23,835 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:23,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:23,835 INFO L82 PathProgramCache]: Analyzing trace with hash -432769320, now seen corresponding path program 1 times [2021-06-05 22:29:23,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:23,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915121721] [2021-06-05 22:29:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:23,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:23,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915121721] [2021-06-05 22:29:23,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915121721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:23,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224230179] [2021-06-05 22:29:23,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:23,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:29:23,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:24,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224230179] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:29:24,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:29:24,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-06-05 22:29:24,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398932765] [2021-06-05 22:29:24,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:29:24,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:24,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:29:24,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:29:24,037 INFO L87 Difference]: Start difference. First operand 204 states and 758 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:24,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:24,081 INFO L93 Difference]: Finished difference Result 500 states and 1907 transitions. [2021-06-05 22:29:24,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:29:24,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:29:24,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:24,085 INFO L225 Difference]: With dead ends: 500 [2021-06-05 22:29:24,086 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 22:29:24,086 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:29:24,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 22:29:24,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 434. [2021-06-05 22:29:24,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.8960739030023093) internal successors, (1687), 433 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:24,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1687 transitions. [2021-06-05 22:29:24,134 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1687 transitions. Word has length 17 [2021-06-05 22:29:24,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:24,134 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1687 transitions. [2021-06-05 22:29:24,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:24,134 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1687 transitions. [2021-06-05 22:29:24,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:29:24,137 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:24,137 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:24,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 22:29:24,357 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:24,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:24,357 INFO L82 PathProgramCache]: Analyzing trace with hash 243471090, now seen corresponding path program 1 times [2021-06-05 22:29:24,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:24,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323443791] [2021-06-05 22:29:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:24,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:24,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323443791] [2021-06-05 22:29:24,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323443791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:24,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178451173] [2021-06-05 22:29:24,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:24,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:29:24,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:24,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178451173] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:29:24,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:29:24,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-06-05 22:29:24,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976450808] [2021-06-05 22:29:24,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:29:24,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:24,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:29:24,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:29:24,483 INFO L87 Difference]: Start difference. First operand 434 states and 1687 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:24,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:24,518 INFO L93 Difference]: Finished difference Result 734 states and 2844 transitions. [2021-06-05 22:29:24,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:29:24,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:29:24,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:24,524 INFO L225 Difference]: With dead ends: 734 [2021-06-05 22:29:24,524 INFO L226 Difference]: Without dead ends: 715 [2021-06-05 22:29:24,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:29:24,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-06-05 22:29:24,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 681. [2021-06-05 22:29:24,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 3.9426470588235296) internal successors, (2681), 680 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 2681 transitions. [2021-06-05 22:29:24,549 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 2681 transitions. Word has length 17 [2021-06-05 22:29:24,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:24,550 INFO L482 AbstractCegarLoop]: Abstraction has 681 states and 2681 transitions. [2021-06-05 22:29:24,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 2681 transitions. [2021-06-05 22:29:24,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:24,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:24,556 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:24,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:24,769 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:24,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:24,769 INFO L82 PathProgramCache]: Analyzing trace with hash -322877901, now seen corresponding path program 1 times [2021-06-05 22:29:24,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:24,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112287959] [2021-06-05 22:29:24,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:24,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:24,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112287959] [2021-06-05 22:29:24,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112287959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:24,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114962728] [2021-06-05 22:29:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:24,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:24,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:25,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 22:29:25,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:25,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:25,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:25,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:9 [2021-06-05 22:29:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:25,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114962728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:25,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:25,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 22:29:25,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417141753] [2021-06-05 22:29:25,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:25,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:25,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:25,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:25,078 INFO L87 Difference]: Start difference. First operand 681 states and 2681 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:25,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:25,395 INFO L93 Difference]: Finished difference Result 1344 states and 5255 transitions. [2021-06-05 22:29:25,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:29:25,396 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:25,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:25,402 INFO L225 Difference]: With dead ends: 1344 [2021-06-05 22:29:25,402 INFO L226 Difference]: Without dead ends: 1314 [2021-06-05 22:29:25,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:29:25,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-06-05 22:29:25,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 727. [2021-06-05 22:29:25,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 3.9958677685950414) internal successors, (2901), 726 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:25,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2901 transitions. [2021-06-05 22:29:25,421 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2901 transitions. Word has length 19 [2021-06-05 22:29:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:25,421 INFO L482 AbstractCegarLoop]: Abstraction has 727 states and 2901 transitions. [2021-06-05 22:29:25,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2901 transitions. [2021-06-05 22:29:25,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:25,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:25,423 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:25,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:25,633 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:25,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:25,633 INFO L82 PathProgramCache]: Analyzing trace with hash 262456051, now seen corresponding path program 2 times [2021-06-05 22:29:25,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:25,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526715213] [2021-06-05 22:29:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:25,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:25,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526715213] [2021-06-05 22:29:25,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526715213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:25,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382630430] [2021-06-05 22:29:25,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:25,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:25,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:25,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:29:25,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:25,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:25,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:25,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:25,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:25,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:25,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 22:29:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:25,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382630430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:25,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:25,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 22:29:25,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027118629] [2021-06-05 22:29:25,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:25,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:25,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:25,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:25,911 INFO L87 Difference]: Start difference. First operand 727 states and 2901 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:26,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:26,025 INFO L93 Difference]: Finished difference Result 918 states and 3625 transitions. [2021-06-05 22:29:26,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:29:26,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:26,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:26,030 INFO L225 Difference]: With dead ends: 918 [2021-06-05 22:29:26,030 INFO L226 Difference]: Without dead ends: 896 [2021-06-05 22:29:26,032 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:26,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-06-05 22:29:26,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 739. [2021-06-05 22:29:26,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.9959349593495936) internal successors, (2949), 738 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:26,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2949 transitions. [2021-06-05 22:29:26,052 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2949 transitions. Word has length 19 [2021-06-05 22:29:26,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:26,053 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2949 transitions. [2021-06-05 22:29:26,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:26,053 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2949 transitions. [2021-06-05 22:29:26,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:26,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:26,054 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:26,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:26,273 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:26,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1876022785, now seen corresponding path program 3 times [2021-06-05 22:29:26,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:26,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682285648] [2021-06-05 22:29:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:26,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:26,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682285648] [2021-06-05 22:29:26,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682285648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:26,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786350663] [2021-06-05 22:29:26,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:26,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:29:26,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:26,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:29:26,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:26,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:26,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:26,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:26,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:26,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:26,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 22:29:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:26,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786350663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:26,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:26,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 22:29:26,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745226090] [2021-06-05 22:29:26,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:26,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:26,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:26,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:26,528 INFO L87 Difference]: Start difference. First operand 739 states and 2949 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:26,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:26,652 INFO L93 Difference]: Finished difference Result 914 states and 3616 transitions. [2021-06-05 22:29:26,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:29:26,652 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:26,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:26,657 INFO L225 Difference]: With dead ends: 914 [2021-06-05 22:29:26,657 INFO L226 Difference]: Without dead ends: 899 [2021-06-05 22:29:26,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:26,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-06-05 22:29:26,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 739. [2021-06-05 22:29:26,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.9959349593495936) internal successors, (2949), 738 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:26,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2949 transitions. [2021-06-05 22:29:26,674 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2949 transitions. Word has length 19 [2021-06-05 22:29:26,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:26,674 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2949 transitions. [2021-06-05 22:29:26,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:26,674 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2949 transitions. [2021-06-05 22:29:26,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:26,676 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:26,676 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:26,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-05 22:29:26,893 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:26,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:26,893 INFO L82 PathProgramCache]: Analyzing trace with hash 26619477, now seen corresponding path program 4 times [2021-06-05 22:29:26,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:26,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81956839] [2021-06-05 22:29:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:26,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:26,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81956839] [2021-06-05 22:29:26,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81956839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:26,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48004836] [2021-06-05 22:29:26,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:27,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:27,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:27,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:27,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:27,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:27,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:27,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:27,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:27,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:7 [2021-06-05 22:29:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:27,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48004836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:27,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:27,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 22:29:27,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384348800] [2021-06-05 22:29:27,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:27,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:27,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:27,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:27,114 INFO L87 Difference]: Start difference. First operand 739 states and 2949 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:27,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:27,319 INFO L93 Difference]: Finished difference Result 1178 states and 4636 transitions. [2021-06-05 22:29:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:29:27,319 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:27,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:27,325 INFO L225 Difference]: With dead ends: 1178 [2021-06-05 22:29:27,325 INFO L226 Difference]: Without dead ends: 1169 [2021-06-05 22:29:27,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:29:27,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-06-05 22:29:27,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 799. [2021-06-05 22:29:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 4.006265664160401) internal successors, (3197), 798 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:27,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 3197 transitions. [2021-06-05 22:29:27,353 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 3197 transitions. Word has length 19 [2021-06-05 22:29:27,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:27,353 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 3197 transitions. [2021-06-05 22:29:27,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:27,354 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 3197 transitions. [2021-06-05 22:29:27,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:27,355 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:27,355 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:27,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:27,565 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:27,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:27,565 INFO L82 PathProgramCache]: Analyzing trace with hash 108018533, now seen corresponding path program 5 times [2021-06-05 22:29:27,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:27,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001445999] [2021-06-05 22:29:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:27,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:27,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001445999] [2021-06-05 22:29:27,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001445999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:27,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380717387] [2021-06-05 22:29:27,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:27,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:29:27,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:27,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 22:29:27,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:27,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:27,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:27,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:27,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:27,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:27,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:36 [2021-06-05 22:29:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:27,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380717387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:27,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:27,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 22:29:27,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092363644] [2021-06-05 22:29:27,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:27,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:27,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:27,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:27,808 INFO L87 Difference]: Start difference. First operand 799 states and 3197 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:28,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:28,322 INFO L93 Difference]: Finished difference Result 1115 states and 4405 transitions. [2021-06-05 22:29:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:29:28,322 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:28,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:28,329 INFO L225 Difference]: With dead ends: 1115 [2021-06-05 22:29:28,329 INFO L226 Difference]: Without dead ends: 1106 [2021-06-05 22:29:28,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 409.0ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:28,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-05 22:29:28,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 803. [2021-06-05 22:29:28,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 4.006234413965087) internal successors, (3213), 802 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:28,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 3213 transitions. [2021-06-05 22:29:28,350 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 3213 transitions. Word has length 19 [2021-06-05 22:29:28,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:28,350 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 3213 transitions. [2021-06-05 22:29:28,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:28,350 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 3213 transitions. [2021-06-05 22:29:28,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:28,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:28,352 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:28,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:28,571 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:28,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:28,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1721585267, now seen corresponding path program 6 times [2021-06-05 22:29:28,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:28,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948900958] [2021-06-05 22:29:28,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:28,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:28,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948900958] [2021-06-05 22:29:28,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948900958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:28,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982731346] [2021-06-05 22:29:28,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:28,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:29:28,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:28,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:28,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:28,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:28,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:28,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:28,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:28,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:28,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-06-05 22:29:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:28,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982731346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:28,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:28,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 22:29:28,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161567792] [2021-06-05 22:29:28,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:29:28,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:28,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:29:28,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:29:28,767 INFO L87 Difference]: Start difference. First operand 803 states and 3213 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:28,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:28,867 INFO L93 Difference]: Finished difference Result 1049 states and 4169 transitions. [2021-06-05 22:29:28,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:29:28,867 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:28,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:28,872 INFO L225 Difference]: With dead ends: 1049 [2021-06-05 22:29:28,872 INFO L226 Difference]: Without dead ends: 1038 [2021-06-05 22:29:28,872 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:29:28,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-06-05 22:29:28,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 809. [2021-06-05 22:29:28,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 4.006188118811881) internal successors, (3237), 808 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:28,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 3237 transitions. [2021-06-05 22:29:28,890 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 3237 transitions. Word has length 19 [2021-06-05 22:29:28,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:28,890 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 3237 transitions. [2021-06-05 22:29:28,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:28,890 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 3237 transitions. [2021-06-05 22:29:28,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:28,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:28,892 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:29,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 22:29:29,105 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:29,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:29,105 INFO L82 PathProgramCache]: Analyzing trace with hash -479624143, now seen corresponding path program 1 times [2021-06-05 22:29:29,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:29,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518229934] [2021-06-05 22:29:29,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:29,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:29,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518229934] [2021-06-05 22:29:29,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518229934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:29,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749326928] [2021-06-05 22:29:29,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:29,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:29,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:29,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:29,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-05 22:29:29,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:29,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:29,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:29,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:14 [2021-06-05 22:29:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:29,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749326928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:29,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:29,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 22:29:29,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689183048] [2021-06-05 22:29:29,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:29:29,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:29,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:29:29,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:29:29,279 INFO L87 Difference]: Start difference. First operand 809 states and 3237 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:29,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:29,388 INFO L93 Difference]: Finished difference Result 1211 states and 4804 transitions. [2021-06-05 22:29:29,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:29:29,389 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:29,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:29,394 INFO L225 Difference]: With dead ends: 1211 [2021-06-05 22:29:29,394 INFO L226 Difference]: Without dead ends: 1194 [2021-06-05 22:29:29,394 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:29,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-06-05 22:29:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 829. [2021-06-05 22:29:29,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 4.01207729468599) internal successors, (3322), 828 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:29,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 3322 transitions. [2021-06-05 22:29:29,421 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 3322 transitions. Word has length 19 [2021-06-05 22:29:29,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:29,421 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 3322 transitions. [2021-06-05 22:29:29,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:29,421 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 3322 transitions. [2021-06-05 22:29:29,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:29,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:29,423 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:29,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:29,633 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:29,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:29,633 INFO L82 PathProgramCache]: Analyzing trace with hash 33902709, now seen corresponding path program 2 times [2021-06-05 22:29:29,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:29,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584750556] [2021-06-05 22:29:29,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:29,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:29,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:29,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584750556] [2021-06-05 22:29:29,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584750556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:29,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530353089] [2021-06-05 22:29:29,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:29,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:29,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:29,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:29:29,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:29,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:29,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:29,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:29,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:29,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:29,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-06-05 22:29:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:29,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530353089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:29,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:29,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 22:29:29,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104980970] [2021-06-05 22:29:29,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:29:29,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:29,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:29:29,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:29:29,807 INFO L87 Difference]: Start difference. First operand 829 states and 3322 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:29,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:29,889 INFO L93 Difference]: Finished difference Result 1110 states and 4398 transitions. [2021-06-05 22:29:29,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:29:29,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:29,894 INFO L225 Difference]: With dead ends: 1110 [2021-06-05 22:29:29,894 INFO L226 Difference]: Without dead ends: 1086 [2021-06-05 22:29:29,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:29:29,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-06-05 22:29:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 846. [2021-06-05 22:29:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 4.011834319526627) internal successors, (3390), 845 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 3390 transitions. [2021-06-05 22:29:29,913 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 3390 transitions. Word has length 19 [2021-06-05 22:29:29,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:29,913 INFO L482 AbstractCegarLoop]: Abstraction has 846 states and 3390 transitions. [2021-06-05 22:29:29,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:29,913 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 3390 transitions. [2021-06-05 22:29:29,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:29,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:29,915 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:30,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:30,129 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:30,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:30,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1109613865, now seen corresponding path program 3 times [2021-06-05 22:29:30,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:30,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289238724] [2021-06-05 22:29:30,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:30,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:30,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289238724] [2021-06-05 22:29:30,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289238724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:30,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250092192] [2021-06-05 22:29:30,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:30,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:29:30,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:30,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:30,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:30,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:30,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:30,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:30,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:30,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:30,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-06-05 22:29:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:30,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250092192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:30,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:30,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 22:29:30,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455697673] [2021-06-05 22:29:30,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:29:30,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:30,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:29:30,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:29:30,298 INFO L87 Difference]: Start difference. First operand 846 states and 3390 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:30,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:30,392 INFO L93 Difference]: Finished difference Result 1105 states and 4384 transitions. [2021-06-05 22:29:30,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:29:30,392 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:30,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:30,400 INFO L225 Difference]: With dead ends: 1105 [2021-06-05 22:29:30,400 INFO L226 Difference]: Without dead ends: 1088 [2021-06-05 22:29:30,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:30,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-05 22:29:30,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 846. [2021-06-05 22:29:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 4.011834319526627) internal successors, (3390), 845 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 3390 transitions. [2021-06-05 22:29:30,418 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 3390 transitions. Word has length 19 [2021-06-05 22:29:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:30,418 INFO L482 AbstractCegarLoop]: Abstraction has 846 states and 3390 transitions. [2021-06-05 22:29:30,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 3390 transitions. [2021-06-05 22:29:30,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:30,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:30,420 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:30,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 22:29:30,633 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:30,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:30,633 INFO L82 PathProgramCache]: Analyzing trace with hash -70116645, now seen corresponding path program 4 times [2021-06-05 22:29:30,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:30,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274587989] [2021-06-05 22:29:30,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:30,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:30,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274587989] [2021-06-05 22:29:30,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274587989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:30,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057849920] [2021-06-05 22:29:30,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 22:29:30,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:30,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:30,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:30,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:30,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 22:29:30,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:30,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:30,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:30,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:9 [2021-06-05 22:29:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:30,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057849920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:30,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:30,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 22:29:30,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443517509] [2021-06-05 22:29:30,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:30,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:30,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:30,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:30,794 INFO L87 Difference]: Start difference. First operand 846 states and 3390 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:31,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:31,019 INFO L93 Difference]: Finished difference Result 1294 states and 5123 transitions. [2021-06-05 22:29:31,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:29:31,020 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:31,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:31,037 INFO L225 Difference]: With dead ends: 1294 [2021-06-05 22:29:31,037 INFO L226 Difference]: Without dead ends: 1285 [2021-06-05 22:29:31,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:29:31,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-06-05 22:29:31,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 872. [2021-06-05 22:29:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 4.013777267508611) internal successors, (3496), 871 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 3496 transitions. [2021-06-05 22:29:31,056 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 3496 transitions. Word has length 19 [2021-06-05 22:29:31,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:31,056 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 3496 transitions. [2021-06-05 22:29:31,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:31,056 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 3496 transitions. [2021-06-05 22:29:31,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:31,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:31,059 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:31,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 22:29:31,265 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:31,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:31,265 INFO L82 PathProgramCache]: Analyzing trace with hash 517628677, now seen corresponding path program 5 times [2021-06-05 22:29:31,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:31,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943071143] [2021-06-05 22:29:31,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:31,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:31,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943071143] [2021-06-05 22:29:31,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943071143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:31,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580515993] [2021-06-05 22:29:31,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:31,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:29:31,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:31,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:31,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:31,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 22:29:31,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:31,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:31,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:31,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-06-05 22:29:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:31,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580515993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:31,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:31,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 22:29:31,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120930278] [2021-06-05 22:29:31,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:31,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:31,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:31,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:31,418 INFO L87 Difference]: Start difference. First operand 872 states and 3496 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:31,639 INFO L93 Difference]: Finished difference Result 1254 states and 4985 transitions. [2021-06-05 22:29:31,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:29:31,640 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:31,643 INFO L225 Difference]: With dead ends: 1254 [2021-06-05 22:29:31,643 INFO L226 Difference]: Without dead ends: 1245 [2021-06-05 22:29:31,643 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 178.8ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:29:31,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-06-05 22:29:31,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 878. [2021-06-05 22:29:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 4.013683010262258) internal successors, (3520), 877 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 3520 transitions. [2021-06-05 22:29:31,661 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 3520 transitions. Word has length 19 [2021-06-05 22:29:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:31,661 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 3520 transitions. [2021-06-05 22:29:31,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 3520 transitions. [2021-06-05 22:29:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:31,663 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:31,663 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:31,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 22:29:31,866 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:31,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:31,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1593339833, now seen corresponding path program 6 times [2021-06-05 22:29:31,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:31,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271551099] [2021-06-05 22:29:31,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:31,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:31,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271551099] [2021-06-05 22:29:31,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271551099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:31,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644278579] [2021-06-05 22:29:31,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:31,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:29:31,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:31,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:31,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:31,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:31,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:31,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:31,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:31,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:31,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-06-05 22:29:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:32,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644278579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:32,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:32,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 22:29:32,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816232608] [2021-06-05 22:29:32,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:29:32,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:32,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:29:32,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:29:32,041 INFO L87 Difference]: Start difference. First operand 878 states and 3520 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:32,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:32,168 INFO L93 Difference]: Finished difference Result 1123 states and 4469 transitions. [2021-06-05 22:29:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:29:32,168 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:32,171 INFO L225 Difference]: With dead ends: 1123 [2021-06-05 22:29:32,171 INFO L226 Difference]: Without dead ends: 1112 [2021-06-05 22:29:32,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:29:32,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-06-05 22:29:32,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 882. [2021-06-05 22:29:32,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 4.013620885357549) internal successors, (3536), 881 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:32,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 3536 transitions. [2021-06-05 22:29:32,188 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 3536 transitions. Word has length 19 [2021-06-05 22:29:32,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:32,188 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 3536 transitions. [2021-06-05 22:29:32,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:32,188 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 3536 transitions. [2021-06-05 22:29:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:32,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:32,190 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:32,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:32,405 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:32,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:32,405 INFO L82 PathProgramCache]: Analyzing trace with hash -297300711, now seen corresponding path program 1 times [2021-06-05 22:29:32,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:32,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242610176] [2021-06-05 22:29:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:32,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:32,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242610176] [2021-06-05 22:29:32,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242610176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:32,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256007143] [2021-06-05 22:29:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:32,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:32,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:32,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:32,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:32,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:32,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:32,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:7 [2021-06-05 22:29:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:32,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256007143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:32,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:32,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 22:29:32,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636188789] [2021-06-05 22:29:32,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:32,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:32,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:32,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:32,566 INFO L87 Difference]: Start difference. First operand 882 states and 3536 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:32,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:32,776 INFO L93 Difference]: Finished difference Result 1282 states and 5074 transitions. [2021-06-05 22:29:32,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:29:32,776 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:32,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:32,779 INFO L225 Difference]: With dead ends: 1282 [2021-06-05 22:29:32,780 INFO L226 Difference]: Without dead ends: 1273 [2021-06-05 22:29:32,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:29:32,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-06-05 22:29:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 909. [2021-06-05 22:29:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 4.02863436123348) internal successors, (3658), 908 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 3658 transitions. [2021-06-05 22:29:32,799 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 3658 transitions. Word has length 19 [2021-06-05 22:29:32,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:32,799 INFO L482 AbstractCegarLoop]: Abstraction has 909 states and 3658 transitions. [2021-06-05 22:29:32,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:32,799 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 3658 transitions. [2021-06-05 22:29:32,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:32,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:32,801 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:33,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 22:29:33,017 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:33,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:33,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1801002105, now seen corresponding path program 1 times [2021-06-05 22:29:33,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:33,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598780548] [2021-06-05 22:29:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:33,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:33,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598780548] [2021-06-05 22:29:33,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598780548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:33,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948828992] [2021-06-05 22:29:33,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:33,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:33,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:33,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 22:29:33,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:33,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:33,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:33,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:9 [2021-06-05 22:29:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:33,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948828992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:33,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:33,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 22:29:33,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754371421] [2021-06-05 22:29:33,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:33,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:33,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:33,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:33,189 INFO L87 Difference]: Start difference. First operand 909 states and 3658 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:33,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:33,461 INFO L93 Difference]: Finished difference Result 1460 states and 5766 transitions. [2021-06-05 22:29:33,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:29:33,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:33,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:33,464 INFO L225 Difference]: With dead ends: 1460 [2021-06-05 22:29:33,465 INFO L226 Difference]: Without dead ends: 1451 [2021-06-05 22:29:33,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:29:33,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-06-05 22:29:33,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 897. [2021-06-05 22:29:33,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 4.011160714285714) internal successors, (3594), 896 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:33,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3594 transitions. [2021-06-05 22:29:33,484 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3594 transitions. Word has length 19 [2021-06-05 22:29:33,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:33,484 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3594 transitions. [2021-06-05 22:29:33,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:33,485 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3594 transitions. [2021-06-05 22:29:33,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:33,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:33,486 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:33,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:33,697 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:33,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:33,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1692671303, now seen corresponding path program 2 times [2021-06-05 22:29:33,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:33,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651022333] [2021-06-05 22:29:33,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:33,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:33,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651022333] [2021-06-05 22:29:33,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651022333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:33,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975357952] [2021-06-05 22:29:33,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:33,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:33,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:33,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:29:33,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:33,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:33,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:33,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:33,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:33,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:33,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 22:29:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:33,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975357952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:33,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:33,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 22:29:33,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464195319] [2021-06-05 22:29:33,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:33,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:33,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:33,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:33,898 INFO L87 Difference]: Start difference. First operand 897 states and 3594 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:34,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:34,215 INFO L93 Difference]: Finished difference Result 1101 states and 4371 transitions. [2021-06-05 22:29:34,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:29:34,216 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:34,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:34,218 INFO L225 Difference]: With dead ends: 1101 [2021-06-05 22:29:34,218 INFO L226 Difference]: Without dead ends: 1092 [2021-06-05 22:29:34,218 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 273.6ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-06-05 22:29:34,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 903. [2021-06-05 22:29:34,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 4.011086474501108) internal successors, (3618), 902 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3618 transitions. [2021-06-05 22:29:34,245 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3618 transitions. Word has length 19 [2021-06-05 22:29:34,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:34,245 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 3618 transitions. [2021-06-05 22:29:34,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:34,246 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3618 transitions. [2021-06-05 22:29:34,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:34,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:34,247 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:34,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:34,457 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:34,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:34,457 INFO L82 PathProgramCache]: Analyzing trace with hash 724489687, now seen corresponding path program 3 times [2021-06-05 22:29:34,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:34,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34702273] [2021-06-05 22:29:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:34,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:34,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34702273] [2021-06-05 22:29:34,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34702273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:34,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828183631] [2021-06-05 22:29:34,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:34,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:29:34,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:34,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:29:34,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:34,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:34,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:34,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:34,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:34,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:34,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 22:29:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:34,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828183631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:34,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:34,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 22:29:34,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271851333] [2021-06-05 22:29:34,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:34,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:34,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:34,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:34,671 INFO L87 Difference]: Start difference. First operand 903 states and 3618 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:34,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:34,953 INFO L93 Difference]: Finished difference Result 1099 states and 4367 transitions. [2021-06-05 22:29:34,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:29:34,954 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:34,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:34,956 INFO L225 Difference]: With dead ends: 1099 [2021-06-05 22:29:34,956 INFO L226 Difference]: Without dead ends: 1087 [2021-06-05 22:29:34,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:34,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-06-05 22:29:34,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 912. [2021-06-05 22:29:34,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 4.010976948408342) internal successors, (3654), 911 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 3654 transitions. [2021-06-05 22:29:34,973 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 3654 transitions. Word has length 19 [2021-06-05 22:29:34,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:34,973 INFO L482 AbstractCegarLoop]: Abstraction has 912 states and 3654 transitions. [2021-06-05 22:29:34,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:34,973 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 3654 transitions. [2021-06-05 22:29:34,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:34,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:34,975 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:35,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 22:29:35,189 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:35,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:35,189 INFO L82 PathProgramCache]: Analyzing trace with hash -981852199, now seen corresponding path program 2 times [2021-06-05 22:29:35,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:35,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492040159] [2021-06-05 22:29:35,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:35,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:35,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492040159] [2021-06-05 22:29:35,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492040159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:35,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004265603] [2021-06-05 22:29:35,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:35,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:35,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:35,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:29:35,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:35,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:35,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:35,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:35,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:35,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:35,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 22:29:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:35,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004265603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:35,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:35,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 22:29:35,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153168053] [2021-06-05 22:29:35,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:35,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:35,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:35,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:35,371 INFO L87 Difference]: Start difference. First operand 912 states and 3654 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:35,707 INFO L93 Difference]: Finished difference Result 1135 states and 4511 transitions. [2021-06-05 22:29:35,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:29:35,707 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:35,709 INFO L225 Difference]: With dead ends: 1135 [2021-06-05 22:29:35,710 INFO L226 Difference]: Without dead ends: 1126 [2021-06-05 22:29:35,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 294.5ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:35,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-06-05 22:29:35,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 920. [2021-06-05 22:29:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 4.0108813928182805) internal successors, (3686), 919 states have internal predecessors, (3686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:35,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3686 transitions. [2021-06-05 22:29:35,725 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3686 transitions. Word has length 19 [2021-06-05 22:29:35,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:35,725 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 3686 transitions. [2021-06-05 22:29:35,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:35,725 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3686 transitions. [2021-06-05 22:29:35,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:35,727 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:35,727 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:35,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:35,941 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:35,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:35,941 INFO L82 PathProgramCache]: Analyzing trace with hash 750463959, now seen corresponding path program 3 times [2021-06-05 22:29:35,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:35,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180309153] [2021-06-05 22:29:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:36,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:36,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180309153] [2021-06-05 22:29:36,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180309153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:36,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516790509] [2021-06-05 22:29:36,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:36,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:29:36,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:36,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:29:36,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:36,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:36,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:36,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:36,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:36,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:36,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 22:29:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:36,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516790509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:36,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:36,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 22:29:36,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386695176] [2021-06-05 22:29:36,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:36,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:36,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:36,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:36,134 INFO L87 Difference]: Start difference. First operand 920 states and 3686 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:36,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:36,455 INFO L93 Difference]: Finished difference Result 1134 states and 4509 transitions. [2021-06-05 22:29:36,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:29:36,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:36,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:36,458 INFO L225 Difference]: With dead ends: 1134 [2021-06-05 22:29:36,458 INFO L226 Difference]: Without dead ends: 1122 [2021-06-05 22:29:36,458 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 286.1ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:36,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-06-05 22:29:36,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 924. [2021-06-05 22:29:36,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 923 states have (on average 4.010834236186349) internal successors, (3702), 923 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 3702 transitions. [2021-06-05 22:29:36,474 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 3702 transitions. Word has length 19 [2021-06-05 22:29:36,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:36,474 INFO L482 AbstractCegarLoop]: Abstraction has 924 states and 3702 transitions. [2021-06-05 22:29:36,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 3702 transitions. [2021-06-05 22:29:36,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:36,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:36,477 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:36,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 22:29:36,689 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:36,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:36,689 INFO L82 PathProgramCache]: Analyzing trace with hash -322425755, now seen corresponding path program 4 times [2021-06-05 22:29:36,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:36,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846984014] [2021-06-05 22:29:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:36,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:36,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846984014] [2021-06-05 22:29:36,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846984014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:36,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715444149] [2021-06-05 22:29:36,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:36,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:36,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:36,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:36,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:36,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 22:29:36,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:36,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:36,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:36,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-06-05 22:29:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:36,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715444149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:36,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:36,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 22:29:36,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274465887] [2021-06-05 22:29:36,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:36,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:36,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:36,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:36,870 INFO L87 Difference]: Start difference. First operand 924 states and 3702 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:37,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:37,130 INFO L93 Difference]: Finished difference Result 1347 states and 5299 transitions. [2021-06-05 22:29:37,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:37,130 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:37,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:37,133 INFO L225 Difference]: With dead ends: 1347 [2021-06-05 22:29:37,133 INFO L226 Difference]: Without dead ends: 1303 [2021-06-05 22:29:37,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:29:37,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-06-05 22:29:37,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 958. [2021-06-05 22:29:37,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 4.020898641588297) internal successors, (3848), 957 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:37,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3848 transitions. [2021-06-05 22:29:37,149 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3848 transitions. Word has length 19 [2021-06-05 22:29:37,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:37,149 INFO L482 AbstractCegarLoop]: Abstraction has 958 states and 3848 transitions. [2021-06-05 22:29:37,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:37,149 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3848 transitions. [2021-06-05 22:29:37,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:37,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:37,151 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:37,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 22:29:37,361 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:37,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:37,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2094735235, now seen corresponding path program 5 times [2021-06-05 22:29:37,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:37,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651217705] [2021-06-05 22:29:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:37,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:37,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651217705] [2021-06-05 22:29:37,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651217705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:37,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769459411] [2021-06-05 22:29:37,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:37,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:29:37,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:37,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:37,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:37,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 22:29:37,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:37,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:37,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:37,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-06-05 22:29:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:37,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769459411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:37,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:37,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 22:29:37,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787871197] [2021-06-05 22:29:37,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:37,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:37,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:37,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:37,507 INFO L87 Difference]: Start difference. First operand 958 states and 3848 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:37,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:37,785 INFO L93 Difference]: Finished difference Result 1389 states and 5495 transitions. [2021-06-05 22:29:37,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:37,785 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:37,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:37,787 INFO L225 Difference]: With dead ends: 1389 [2021-06-05 22:29:37,787 INFO L226 Difference]: Without dead ends: 1359 [2021-06-05 22:29:37,787 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:29:37,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-05 22:29:37,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 991. [2021-06-05 22:29:37,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 4.042424242424242) internal successors, (4002), 990 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:37,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 4002 transitions. [2021-06-05 22:29:37,813 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 4002 transitions. Word has length 19 [2021-06-05 22:29:37,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:37,813 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 4002 transitions. [2021-06-05 22:29:37,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:37,813 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 4002 transitions. [2021-06-05 22:29:37,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:37,815 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:37,815 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:38,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:38,031 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:38,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:38,031 INFO L82 PathProgramCache]: Analyzing trace with hash 486420053, now seen corresponding path program 6 times [2021-06-05 22:29:38,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:38,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664113989] [2021-06-05 22:29:38,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:38,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:38,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664113989] [2021-06-05 22:29:38,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664113989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:38,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600406795] [2021-06-05 22:29:38,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:38,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:29:38,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:38,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:38,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:38,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:38,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-05 22:29:38,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:38,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:38,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:38,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:14 [2021-06-05 22:29:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:38,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600406795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:38,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:38,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 22:29:38,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333623232] [2021-06-05 22:29:38,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:29:38,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:38,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:29:38,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:29:38,180 INFO L87 Difference]: Start difference. First operand 991 states and 4002 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:38,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:38,284 INFO L93 Difference]: Finished difference Result 1261 states and 5037 transitions. [2021-06-05 22:29:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:29:38,284 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:38,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:38,286 INFO L225 Difference]: With dead ends: 1261 [2021-06-05 22:29:38,286 INFO L226 Difference]: Without dead ends: 1246 [2021-06-05 22:29:38,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:38,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-06-05 22:29:38,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1001. [2021-06-05 22:29:38,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 4.04) internal successors, (4040), 1000 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 4040 transitions. [2021-06-05 22:29:38,304 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 4040 transitions. Word has length 19 [2021-06-05 22:29:38,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:38,304 INFO L482 AbstractCegarLoop]: Abstraction has 1001 states and 4040 transitions. [2021-06-05 22:29:38,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:38,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 4040 transitions. [2021-06-05 22:29:38,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:38,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:38,306 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:38,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 22:29:38,521 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:38,521 INFO L82 PathProgramCache]: Analyzing trace with hash -967847337, now seen corresponding path program 4 times [2021-06-05 22:29:38,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:38,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943395424] [2021-06-05 22:29:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:38,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:38,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943395424] [2021-06-05 22:29:38,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943395424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:38,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80347888] [2021-06-05 22:29:38,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:38,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:38,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:38,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:38,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:38,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:38,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:38,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:38,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:38,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:38,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 22:29:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:38,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80347888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:38,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:38,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 22:29:38,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079233929] [2021-06-05 22:29:38,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:29:38,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:38,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:29:38,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:29:38,730 INFO L87 Difference]: Start difference. First operand 1001 states and 4040 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:38,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:38,817 INFO L93 Difference]: Finished difference Result 1212 states and 4842 transitions. [2021-06-05 22:29:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:29:38,817 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:38,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:38,819 INFO L225 Difference]: With dead ends: 1212 [2021-06-05 22:29:38,819 INFO L226 Difference]: Without dead ends: 1188 [2021-06-05 22:29:38,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:29:38,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2021-06-05 22:29:38,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1014. [2021-06-05 22:29:38,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 4.036525172754195) internal successors, (4089), 1013 states have internal predecessors, (4089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:38,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 4089 transitions. [2021-06-05 22:29:38,836 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 4089 transitions. Word has length 19 [2021-06-05 22:29:38,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:38,836 INFO L482 AbstractCegarLoop]: Abstraction has 1014 states and 4089 transitions. [2021-06-05 22:29:38,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 4089 transitions. [2021-06-05 22:29:38,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:38,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:38,838 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:39,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:39,053 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:39,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:39,053 INFO L82 PathProgramCache]: Analyzing trace with hash 764468821, now seen corresponding path program 5 times [2021-06-05 22:29:39,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:39,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079899215] [2021-06-05 22:29:39,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:39,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:39,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079899215] [2021-06-05 22:29:39,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079899215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:39,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266731347] [2021-06-05 22:29:39,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:39,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:29:39,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:39,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:39,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:39,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 22:29:39,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:39,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:39,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:39,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-06-05 22:29:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:39,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266731347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:39,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:39,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 22:29:39,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128410942] [2021-06-05 22:29:39,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:39,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:39,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:39,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:39,197 INFO L87 Difference]: Start difference. First operand 1014 states and 4089 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:39,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:39,468 INFO L93 Difference]: Finished difference Result 1376 states and 5493 transitions. [2021-06-05 22:29:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:39,468 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:39,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:39,470 INFO L225 Difference]: With dead ends: 1376 [2021-06-05 22:29:39,470 INFO L226 Difference]: Without dead ends: 1359 [2021-06-05 22:29:39,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:29:39,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-05 22:29:39,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1018. [2021-06-05 22:29:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 4.03638151425762) internal successors, (4105), 1017 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:39,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 4105 transitions. [2021-06-05 22:29:39,487 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 4105 transitions. Word has length 19 [2021-06-05 22:29:39,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:39,487 INFO L482 AbstractCegarLoop]: Abstraction has 1018 states and 4105 transitions. [2021-06-05 22:29:39,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:39,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 4105 transitions. [2021-06-05 22:29:39,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:29:39,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:39,489 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:39,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 22:29:39,704 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:39,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:39,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1342315299, now seen corresponding path program 6 times [2021-06-05 22:29:39,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:39,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870697378] [2021-06-05 22:29:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:39,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:39,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870697378] [2021-06-05 22:29:39,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870697378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:39,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360759024] [2021-06-05 22:29:39,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:39,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:29:39,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:39,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:39,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:39,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:39,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:39,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:39,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:39,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:39,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-06-05 22:29:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:39,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360759024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:39,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:39,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 22:29:39,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416603854] [2021-06-05 22:29:39,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:29:39,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:39,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:29:39,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:29:39,853 INFO L87 Difference]: Start difference. First operand 1018 states and 4105 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:39,951 INFO L93 Difference]: Finished difference Result 1318 states and 5270 transitions. [2021-06-05 22:29:39,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:29:39,951 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:29:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:39,953 INFO L225 Difference]: With dead ends: 1318 [2021-06-05 22:29:39,953 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 22:29:39,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:29:39,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 22:29:39,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1022. [2021-06-05 22:29:39,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 4.040156709108717) internal successors, (4125), 1021 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 4125 transitions. [2021-06-05 22:29:39,970 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 4125 transitions. Word has length 19 [2021-06-05 22:29:39,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:39,970 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 4125 transitions. [2021-06-05 22:29:39,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:39,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 4125 transitions. [2021-06-05 22:29:39,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:29:39,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:39,971 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:40,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:40,189 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:40,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:40,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1382222734, now seen corresponding path program 7 times [2021-06-05 22:29:40,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:40,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887641739] [2021-06-05 22:29:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:40,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:40,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887641739] [2021-06-05 22:29:40,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887641739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:40,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470853405] [2021-06-05 22:29:40,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 22:29:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:40,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:40,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:40,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470853405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:40,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:40,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-05 22:29:40,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875209984] [2021-06-05 22:29:40,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:29:40,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:40,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:29:40,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:29:40,286 INFO L87 Difference]: Start difference. First operand 1022 states and 4125 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:40,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:40,334 INFO L93 Difference]: Finished difference Result 2014 states and 7938 transitions. [2021-06-05 22:29:40,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:29:40,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:29:40,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:40,338 INFO L225 Difference]: With dead ends: 2014 [2021-06-05 22:29:40,338 INFO L226 Difference]: Without dead ends: 1951 [2021-06-05 22:29:40,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:29:40,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2021-06-05 22:29:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1571. [2021-06-05 22:29:40,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 4.067515923566879) internal successors, (6386), 1570 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 6386 transitions. [2021-06-05 22:29:40,371 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 6386 transitions. Word has length 21 [2021-06-05 22:29:40,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:40,371 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 6386 transitions. [2021-06-05 22:29:40,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:40,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 6386 transitions. [2021-06-05 22:29:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:29:40,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:40,374 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:40,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 22:29:40,589 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:40,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:40,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1995857238, now seen corresponding path program 8 times [2021-06-05 22:29:40,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:40,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277670951] [2021-06-05 22:29:40,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:40,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:40,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277670951] [2021-06-05 22:29:40,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277670951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:40,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524087078] [2021-06-05 22:29:40,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:40,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:40,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:40,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:29:40,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:40,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524087078] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:29:40,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:29:40,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-06-05 22:29:40,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316363019] [2021-06-05 22:29:40,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:29:40,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:40,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:29:40,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:29:40,691 INFO L87 Difference]: Start difference. First operand 1571 states and 6386 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:40,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:40,718 INFO L93 Difference]: Finished difference Result 2412 states and 9687 transitions. [2021-06-05 22:29:40,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:29:40,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:29:40,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:40,722 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 22:29:40,722 INFO L226 Difference]: Without dead ends: 2339 [2021-06-05 22:29:40,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:29:40,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2021-06-05 22:29:40,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 1746. [2021-06-05 22:29:40,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 4.050429799426934) internal successors, (7068), 1745 states have internal predecessors, (7068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 7068 transitions. [2021-06-05 22:29:40,774 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 7068 transitions. Word has length 21 [2021-06-05 22:29:40,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:40,774 INFO L482 AbstractCegarLoop]: Abstraction has 1746 states and 7068 transitions. [2021-06-05 22:29:40,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:40,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 7068 transitions. [2021-06-05 22:29:40,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:29:40,777 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:40,777 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:40,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:40,985 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:40,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:40,985 INFO L82 PathProgramCache]: Analyzing trace with hash -173194186, now seen corresponding path program 9 times [2021-06-05 22:29:40,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:40,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853066311] [2021-06-05 22:29:40,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:41,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:41,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853066311] [2021-06-05 22:29:41,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853066311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:41,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779531726] [2021-06-05 22:29:41,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:41,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:29:41,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:41,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:29:41,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:41,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779531726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:41,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:41,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 22:29:41,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041464142] [2021-06-05 22:29:41,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:29:41,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:41,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:29:41,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:29:41,082 INFO L87 Difference]: Start difference. First operand 1746 states and 7068 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:41,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:41,162 INFO L93 Difference]: Finished difference Result 2801 states and 11129 transitions. [2021-06-05 22:29:41,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:29:41,162 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:29:41,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:41,167 INFO L225 Difference]: With dead ends: 2801 [2021-06-05 22:29:41,168 INFO L226 Difference]: Without dead ends: 2786 [2021-06-05 22:29:41,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:41,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-06-05 22:29:41,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2373. [2021-06-05 22:29:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2373 states, 2372 states have (on average 4.099494097807757) internal successors, (9724), 2372 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 9724 transitions. [2021-06-05 22:29:41,207 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 9724 transitions. Word has length 21 [2021-06-05 22:29:41,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:41,207 INFO L482 AbstractCegarLoop]: Abstraction has 2373 states and 9724 transitions. [2021-06-05 22:29:41,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:41,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 9724 transitions. [2021-06-05 22:29:41,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:29:41,211 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:41,211 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:41,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 22:29:41,417 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:41,417 INFO L82 PathProgramCache]: Analyzing trace with hash 253599539, now seen corresponding path program 10 times [2021-06-05 22:29:41,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:41,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871286707] [2021-06-05 22:29:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:41,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:41,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871286707] [2021-06-05 22:29:41,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871286707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:41,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836525535] [2021-06-05 22:29:41,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:41,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:41,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:41,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:29:41,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:41,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:41,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:29:41,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:41,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:41,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:41,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:29:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:41,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836525535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:41,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:41,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:29:41,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336696999] [2021-06-05 22:29:41,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:29:41,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:41,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:29:41,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:29:41,837 INFO L87 Difference]: Start difference. First operand 2373 states and 9724 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:42,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:42,608 INFO L93 Difference]: Finished difference Result 2708 states and 11032 transitions. [2021-06-05 22:29:42,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:29:42,608 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:29:42,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:42,613 INFO L225 Difference]: With dead ends: 2708 [2021-06-05 22:29:42,613 INFO L226 Difference]: Without dead ends: 2703 [2021-06-05 22:29:42,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 601.7ms TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:29:42,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2021-06-05 22:29:42,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2417. [2021-06-05 22:29:42,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 4.112996688741722) internal successors, (9937), 2416 states have internal predecessors, (9937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 9937 transitions. [2021-06-05 22:29:42,648 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 9937 transitions. Word has length 23 [2021-06-05 22:29:42,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:42,649 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 9937 transitions. [2021-06-05 22:29:42,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:42,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 9937 transitions. [2021-06-05 22:29:42,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:29:42,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:42,653 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:42,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:42,857 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:42,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:42,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1782556683, now seen corresponding path program 11 times [2021-06-05 22:29:42,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:42,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256599407] [2021-06-05 22:29:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:42,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:42,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256599407] [2021-06-05 22:29:42,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256599407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:42,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154906417] [2021-06-05 22:29:42,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:42,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:29:42,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:42,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:29:42,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:42,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154906417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:42,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:42,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 22:29:42,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267246101] [2021-06-05 22:29:42,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:29:42,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:42,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:29:42,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:29:42,980 INFO L87 Difference]: Start difference. First operand 2417 states and 9937 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:43,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:43,088 INFO L93 Difference]: Finished difference Result 4616 states and 18575 transitions. [2021-06-05 22:29:43,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:29:43,088 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:29:43,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:43,096 INFO L225 Difference]: With dead ends: 4616 [2021-06-05 22:29:43,096 INFO L226 Difference]: Without dead ends: 4291 [2021-06-05 22:29:43,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:29:43,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4291 states. [2021-06-05 22:29:43,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4291 to 2839. [2021-06-05 22:29:43,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2839 states, 2838 states have (on average 4.137420718816068) internal successors, (11742), 2838 states have internal predecessors, (11742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2839 states to 2839 states and 11742 transitions. [2021-06-05 22:29:43,146 INFO L78 Accepts]: Start accepts. Automaton has 2839 states and 11742 transitions. Word has length 23 [2021-06-05 22:29:43,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:43,146 INFO L482 AbstractCegarLoop]: Abstraction has 2839 states and 11742 transitions. [2021-06-05 22:29:43,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:43,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2839 states and 11742 transitions. [2021-06-05 22:29:43,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:29:43,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:43,151 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:43,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 22:29:43,365 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:43,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:43,365 INFO L82 PathProgramCache]: Analyzing trace with hash 118811635, now seen corresponding path program 12 times [2021-06-05 22:29:43,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:43,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719278186] [2021-06-05 22:29:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:43,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:43,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719278186] [2021-06-05 22:29:43,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719278186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:43,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453971211] [2021-06-05 22:29:43,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 22:29:43,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:29:43,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:43,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:29:43,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:43,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:43,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:29:43,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:43,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:43,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:43,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:29:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:43,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453971211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:43,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:43,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:29:43,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067267828] [2021-06-05 22:29:43,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:29:43,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:43,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:29:43,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:29:43,786 INFO L87 Difference]: Start difference. First operand 2839 states and 11742 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:44,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:44,649 INFO L93 Difference]: Finished difference Result 3383 states and 13890 transitions. [2021-06-05 22:29:44,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:29:44,649 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:29:44,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:44,672 INFO L225 Difference]: With dead ends: 3383 [2021-06-05 22:29:44,672 INFO L226 Difference]: Without dead ends: 3361 [2021-06-05 22:29:44,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 682.4ms TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:29:44,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-06-05 22:29:44,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2851. [2021-06-05 22:29:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 4.1375438596491225) internal successors, (11792), 2850 states have internal predecessors, (11792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 11792 transitions. [2021-06-05 22:29:44,713 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 11792 transitions. Word has length 23 [2021-06-05 22:29:44,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:44,714 INFO L482 AbstractCegarLoop]: Abstraction has 2851 states and 11792 transitions. [2021-06-05 22:29:44,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:44,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 11792 transitions. [2021-06-05 22:29:44,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:29:44,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:44,718 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:44,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 22:29:44,933 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:44,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:44,933 INFO L82 PathProgramCache]: Analyzing trace with hash 704145587, now seen corresponding path program 13 times [2021-06-05 22:29:44,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:44,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494276926] [2021-06-05 22:29:44,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:45,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:45,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494276926] [2021-06-05 22:29:45,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494276926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:45,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599549588] [2021-06-05 22:29:45,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:45,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:29:45,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:45,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:45,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:29:45,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:45,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:45,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:45,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:29:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:45,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599549588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:45,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:45,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:29:45,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159408737] [2021-06-05 22:29:45,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:29:45,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:45,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:29:45,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:29:45,330 INFO L87 Difference]: Start difference. First operand 2851 states and 11792 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:46,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:46,180 INFO L93 Difference]: Finished difference Result 3278 states and 13451 transitions. [2021-06-05 22:29:46,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:29:46,181 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:29:46,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:46,186 INFO L225 Difference]: With dead ends: 3278 [2021-06-05 22:29:46,186 INFO L226 Difference]: Without dead ends: 3252 [2021-06-05 22:29:46,186 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 828.1ms TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:29:46,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2021-06-05 22:29:46,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 2867. [2021-06-05 22:29:46,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2867 states, 2866 states have (on average 4.136775994417306) internal successors, (11856), 2866 states have internal predecessors, (11856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2867 states to 2867 states and 11856 transitions. [2021-06-05 22:29:46,224 INFO L78 Accepts]: Start accepts. Automaton has 2867 states and 11856 transitions. Word has length 23 [2021-06-05 22:29:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:46,224 INFO L482 AbstractCegarLoop]: Abstraction has 2867 states and 11856 transitions. [2021-06-05 22:29:46,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2867 states and 11856 transitions. [2021-06-05 22:29:46,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:29:46,228 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:46,228 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:46,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 22:29:46,429 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:46,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:46,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1977254975, now seen corresponding path program 14 times [2021-06-05 22:29:46,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:46,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415789191] [2021-06-05 22:29:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:46,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:46,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415789191] [2021-06-05 22:29:46,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415789191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:46,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109209619] [2021-06-05 22:29:46,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:46,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:46,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:46,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:29:46,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:46,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:46,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:29:46,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:46,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:46,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:46,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:29:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:46,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109209619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:46,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:46,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:29:46,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297869516] [2021-06-05 22:29:46,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:29:46,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:46,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:29:46,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:29:46,834 INFO L87 Difference]: Start difference. First operand 2867 states and 11856 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:47,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:47,832 INFO L93 Difference]: Finished difference Result 3257 states and 13379 transitions. [2021-06-05 22:29:47,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:29:47,833 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:29:47,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:47,839 INFO L225 Difference]: With dead ends: 3257 [2021-06-05 22:29:47,839 INFO L226 Difference]: Without dead ends: 3236 [2021-06-05 22:29:47,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 843.0ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:29:47,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-05 22:29:47,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2863. [2021-06-05 22:29:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 4.13696715583508) internal successors, (11840), 2862 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:47,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 11840 transitions. [2021-06-05 22:29:47,882 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 11840 transitions. Word has length 23 [2021-06-05 22:29:47,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:47,882 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 11840 transitions. [2021-06-05 22:29:47,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:47,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 11840 transitions. [2021-06-05 22:29:47,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:29:47,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:47,887 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:48,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 22:29:48,101 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:48,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:48,101 INFO L82 PathProgramCache]: Analyzing trace with hash 273249153, now seen corresponding path program 15 times [2021-06-05 22:29:48,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:48,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018956910] [2021-06-05 22:29:48,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:48,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:48,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018956910] [2021-06-05 22:29:48,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018956910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:48,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751716063] [2021-06-05 22:29:48,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:48,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:29:48,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:48,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:29:48,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:48,417 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 22:29:48,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 65 [2021-06-05 22:29:48,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:48,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:48,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:48,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:14 [2021-06-05 22:29:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:48,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751716063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:48,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:48,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:29:48,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409905976] [2021-06-05 22:29:48,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:29:48,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:48,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:29:48,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:29:48,505 INFO L87 Difference]: Start difference. First operand 2863 states and 11840 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:49,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:49,159 INFO L93 Difference]: Finished difference Result 3196 states and 13139 transitions. [2021-06-05 22:29:49,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:29:49,159 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:29:49,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:49,165 INFO L225 Difference]: With dead ends: 3196 [2021-06-05 22:29:49,165 INFO L226 Difference]: Without dead ends: 3181 [2021-06-05 22:29:49,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 482.2ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:29:49,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-06-05 22:29:49,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2863. [2021-06-05 22:29:49,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 4.13696715583508) internal successors, (11840), 2862 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 11840 transitions. [2021-06-05 22:29:49,214 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 11840 transitions. Word has length 23 [2021-06-05 22:29:49,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:49,214 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 11840 transitions. [2021-06-05 22:29:49,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:49,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 11840 transitions. [2021-06-05 22:29:49,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:29:49,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:49,219 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:49,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:49,435 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:49,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1462628087, now seen corresponding path program 16 times [2021-06-05 22:29:49,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:49,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034233122] [2021-06-05 22:29:49,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:49,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:49,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034233122] [2021-06-05 22:29:49,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034233122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:49,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565313766] [2021-06-05 22:29:49,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:49,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:49,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:49,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:29:49,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:49,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:49,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:29:49,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:49,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:49,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:49,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:29:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:49,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565313766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:49,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:49,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:29:49,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689949618] [2021-06-05 22:29:49,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:29:49,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:49,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:29:49,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:29:49,807 INFO L87 Difference]: Start difference. First operand 2863 states and 11840 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:50,624 INFO L93 Difference]: Finished difference Result 3681 states and 15040 transitions. [2021-06-05 22:29:50,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:29:50,624 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:29:50,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:50,631 INFO L225 Difference]: With dead ends: 3681 [2021-06-05 22:29:50,631 INFO L226 Difference]: Without dead ends: 3651 [2021-06-05 22:29:50,631 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 591.4ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:29:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2021-06-05 22:29:50,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 2898. [2021-06-05 22:29:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2898 states, 2897 states have (on average 4.137038315498792) internal successors, (11985), 2897 states have internal predecessors, (11985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:50,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2898 states to 2898 states and 11985 transitions. [2021-06-05 22:29:50,676 INFO L78 Accepts]: Start accepts. Automaton has 2898 states and 11985 transitions. Word has length 23 [2021-06-05 22:29:50,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:50,676 INFO L482 AbstractCegarLoop]: Abstraction has 2898 states and 11985 transitions. [2021-06-05 22:29:50,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:50,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2898 states and 11985 transitions. [2021-06-05 22:29:50,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:29:50,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:50,681 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:50,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 22:29:50,901 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:50,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:50,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1544027143, now seen corresponding path program 17 times [2021-06-05 22:29:50,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:50,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913359402] [2021-06-05 22:29:50,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:51,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:51,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913359402] [2021-06-05 22:29:51,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913359402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:51,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126337487] [2021-06-05 22:29:51,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:51,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:29:51,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:51,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:29:51,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:51,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:51,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:29:51,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:51,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:51,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:51,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 22:29:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:51,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126337487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:51,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:51,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:29:51,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304226847] [2021-06-05 22:29:51,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:29:51,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:51,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:29:51,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:29:51,214 INFO L87 Difference]: Start difference. First operand 2898 states and 11985 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:51,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:51,823 INFO L93 Difference]: Finished difference Result 3457 states and 14154 transitions. [2021-06-05 22:29:51,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:29:51,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:29:51,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:51,829 INFO L225 Difference]: With dead ends: 3457 [2021-06-05 22:29:51,829 INFO L226 Difference]: Without dead ends: 3431 [2021-06-05 22:29:51,829 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 454.6ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:29:51,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-06-05 22:29:51,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2902. [2021-06-05 22:29:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2901 states have (on average 4.136849362288866) internal successors, (12001), 2901 states have internal predecessors, (12001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:51,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 12001 transitions. [2021-06-05 22:29:51,871 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 12001 transitions. Word has length 23 [2021-06-05 22:29:51,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:51,871 INFO L482 AbstractCegarLoop]: Abstraction has 2902 states and 12001 transitions. [2021-06-05 22:29:51,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:51,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 12001 transitions. [2021-06-05 22:29:51,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:29:51,875 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:51,875 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:52,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 22:29:52,089 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:52,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1137373419, now seen corresponding path program 18 times [2021-06-05 22:29:52,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:52,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519256933] [2021-06-05 22:29:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:52,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:52,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519256933] [2021-06-05 22:29:52,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519256933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:52,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351080574] [2021-06-05 22:29:52,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:52,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:29:52,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:52,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:29:52,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:52,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:52,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:29:52,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:52,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:52,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:52,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:29:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:52,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351080574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:52,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:52,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:29:52,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172460726] [2021-06-05 22:29:52,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:29:52,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:52,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:29:52,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:29:52,398 INFO L87 Difference]: Start difference. First operand 2902 states and 12001 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:53,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:53,216 INFO L93 Difference]: Finished difference Result 3466 states and 14203 transitions. [2021-06-05 22:29:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:29:53,216 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:29:53,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:53,222 INFO L225 Difference]: With dead ends: 3466 [2021-06-05 22:29:53,222 INFO L226 Difference]: Without dead ends: 3445 [2021-06-05 22:29:53,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 648.2ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:29:53,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3445 states. [2021-06-05 22:29:53,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3445 to 2908. [2021-06-05 22:29:53,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2908 states, 2907 states have (on average 4.13656690746474) internal successors, (12025), 2907 states have internal predecessors, (12025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 12025 transitions. [2021-06-05 22:29:53,263 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 12025 transitions. Word has length 23 [2021-06-05 22:29:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:53,264 INFO L482 AbstractCegarLoop]: Abstraction has 2908 states and 12025 transitions. [2021-06-05 22:29:53,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:53,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 12025 transitions. [2021-06-05 22:29:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:29:53,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:53,268 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:53,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:53,469 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:53,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:53,469 INFO L82 PathProgramCache]: Analyzing trace with hash -2112317581, now seen corresponding path program 19 times [2021-06-05 22:29:53,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:53,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194259567] [2021-06-05 22:29:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:53,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:53,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194259567] [2021-06-05 22:29:53,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194259567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:53,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449150704] [2021-06-05 22:29:53,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:53,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:29:53,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:53,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:53,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:29:53,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:53,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:53,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:53,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:29:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:53,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449150704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:53,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:53,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:29:53,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331853822] [2021-06-05 22:29:53,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:29:53,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:53,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:29:53,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:29:53,820 INFO L87 Difference]: Start difference. First operand 2908 states and 12025 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:54,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:54,523 INFO L93 Difference]: Finished difference Result 3319 states and 13629 transitions. [2021-06-05 22:29:54,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:29:54,524 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:29:54,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:54,529 INFO L225 Difference]: With dead ends: 3319 [2021-06-05 22:29:54,529 INFO L226 Difference]: Without dead ends: 3296 [2021-06-05 22:29:54,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 528.4ms TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:29:54,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2021-06-05 22:29:54,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 2915. [2021-06-05 22:29:54,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2915 states, 2914 states have (on average 4.136238846945779) internal successors, (12053), 2914 states have internal predecessors, (12053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2915 states to 2915 states and 12053 transitions. [2021-06-05 22:29:54,568 INFO L78 Accepts]: Start accepts. Automaton has 2915 states and 12053 transitions. Word has length 23 [2021-06-05 22:29:54,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:54,569 INFO L482 AbstractCegarLoop]: Abstraction has 2915 states and 12053 transitions. [2021-06-05 22:29:54,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:54,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2915 states and 12053 transitions. [2021-06-05 22:29:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:29:54,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:54,573 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:54,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:54,780 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:54,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:54,780 INFO L82 PathProgramCache]: Analyzing trace with hash 71296115, now seen corresponding path program 20 times [2021-06-05 22:29:54,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:54,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582405305] [2021-06-05 22:29:54,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:54,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:54,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582405305] [2021-06-05 22:29:54,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582405305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:54,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943899355] [2021-06-05 22:29:54,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:54,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:54,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:54,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:29:54,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:55,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:55,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:29:55,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:55,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:55,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:55,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:29:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:55,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943899355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:55,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:55,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:29:55,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800227335] [2021-06-05 22:29:55,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:29:55,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:55,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:29:55,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:29:55,181 INFO L87 Difference]: Start difference. First operand 2915 states and 12053 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:56,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:56,022 INFO L93 Difference]: Finished difference Result 3498 states and 14351 transitions. [2021-06-05 22:29:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:29:56,022 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:29:56,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:56,028 INFO L225 Difference]: With dead ends: 3498 [2021-06-05 22:29:56,028 INFO L226 Difference]: Without dead ends: 3476 [2021-06-05 22:29:56,029 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 650.8ms TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:29:56,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3476 states. [2021-06-05 22:29:56,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3476 to 2931. [2021-06-05 22:29:56,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2931 states, 2930 states have (on average 4.138225255972697) internal successors, (12125), 2930 states have internal predecessors, (12125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2931 states to 2931 states and 12125 transitions. [2021-06-05 22:29:56,067 INFO L78 Accepts]: Start accepts. Automaton has 2931 states and 12125 transitions. Word has length 23 [2021-06-05 22:29:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:56,067 INFO L482 AbstractCegarLoop]: Abstraction has 2931 states and 12125 transitions. [2021-06-05 22:29:56,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:56,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2931 states and 12125 transitions. [2021-06-05 22:29:56,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:29:56,072 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:56,072 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:56,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:56,272 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:56,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:56,272 INFO L82 PathProgramCache]: Analyzing trace with hash 656630067, now seen corresponding path program 21 times [2021-06-05 22:29:56,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:56,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898394128] [2021-06-05 22:29:56,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:56,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:56,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898394128] [2021-06-05 22:29:56,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898394128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:56,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099522815] [2021-06-05 22:29:56,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:56,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:29:56,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:56,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:29:56,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:56,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:56,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:29:56,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:56,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:56,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:56,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:29:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:56,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099522815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:56,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:56,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:29:56,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735183112] [2021-06-05 22:29:56,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:29:56,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:56,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:29:56,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:29:56,671 INFO L87 Difference]: Start difference. First operand 2931 states and 12125 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:57,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:57,508 INFO L93 Difference]: Finished difference Result 3353 states and 13762 transitions. [2021-06-05 22:29:57,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:29:57,508 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:29:57,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:57,514 INFO L225 Difference]: With dead ends: 3353 [2021-06-05 22:29:57,514 INFO L226 Difference]: Without dead ends: 3327 [2021-06-05 22:29:57,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 762.5ms TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:29:57,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2021-06-05 22:29:57,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 2935. [2021-06-05 22:29:57,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 4.138036809815951) internal successors, (12141), 2934 states have internal predecessors, (12141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:57,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 12141 transitions. [2021-06-05 22:29:57,552 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 12141 transitions. Word has length 23 [2021-06-05 22:29:57,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:57,552 INFO L482 AbstractCegarLoop]: Abstraction has 2935 states and 12141 transitions. [2021-06-05 22:29:57,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:57,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 12141 transitions. [2021-06-05 22:29:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:29:57,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:57,556 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:57,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 22:29:57,757 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:57,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:57,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2024770495, now seen corresponding path program 22 times [2021-06-05 22:29:57,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:57,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665925957] [2021-06-05 22:29:57,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:57,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:57,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665925957] [2021-06-05 22:29:57,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665925957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:57,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567411628] [2021-06-05 22:29:57,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:57,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:57,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:57,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:29:57,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:58,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:58,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:29:58,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:58,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:58,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:58,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:29:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:58,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567411628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:58,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:58,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:29:58,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916500847] [2021-06-05 22:29:58,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:29:58,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:58,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:29:58,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:29:58,145 INFO L87 Difference]: Start difference. First operand 2935 states and 12141 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:58,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:58,956 INFO L93 Difference]: Finished difference Result 3378 states and 13868 transitions. [2021-06-05 22:29:58,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:29:58,956 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:29:58,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:58,962 INFO L225 Difference]: With dead ends: 3378 [2021-06-05 22:29:58,962 INFO L226 Difference]: Without dead ends: 3357 [2021-06-05 22:29:58,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 755.5ms TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:29:58,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2021-06-05 22:29:58,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 2927. [2021-06-05 22:29:58,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 4.137730690362269) internal successors, (12107), 2926 states have internal predecessors, (12107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 12107 transitions. [2021-06-05 22:29:59,001 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 12107 transitions. Word has length 23 [2021-06-05 22:29:59,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:59,001 INFO L482 AbstractCegarLoop]: Abstraction has 2927 states and 12107 transitions. [2021-06-05 22:29:59,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:59,001 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 12107 transitions. [2021-06-05 22:29:59,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:29:59,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:59,005 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:59,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:59,220 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:59,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:59,221 INFO L82 PathProgramCache]: Analyzing trace with hash 420793493, now seen corresponding path program 23 times [2021-06-05 22:29:59,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:59,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226216962] [2021-06-05 22:29:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:59,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:59,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226216962] [2021-06-05 22:29:59,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226216962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:59,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472209408] [2021-06-05 22:29:59,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:59,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:29:59,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:59,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:29:59,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:59,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:59,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:29:59,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:59,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:59,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:59,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:29:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:59,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472209408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:59,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:59,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:29:59,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936767307] [2021-06-05 22:29:59,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:29:59,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:59,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:29:59,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:29:59,529 INFO L87 Difference]: Start difference. First operand 2927 states and 12107 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:00,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:00,344 INFO L93 Difference]: Finished difference Result 3749 states and 15336 transitions. [2021-06-05 22:30:00,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:30:00,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:00,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:00,351 INFO L225 Difference]: With dead ends: 3749 [2021-06-05 22:30:00,351 INFO L226 Difference]: Without dead ends: 3719 [2021-06-05 22:30:00,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 601.9ms TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:30:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-06-05 22:30:00,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 2931. [2021-06-05 22:30:00,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2931 states, 2930 states have (on average 4.138225255972697) internal successors, (12125), 2930 states have internal predecessors, (12125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2931 states to 2931 states and 12125 transitions. [2021-06-05 22:30:00,393 INFO L78 Accepts]: Start accepts. Automaton has 2931 states and 12125 transitions. Word has length 23 [2021-06-05 22:30:00,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:00,393 INFO L482 AbstractCegarLoop]: Abstraction has 2931 states and 12125 transitions. [2021-06-05 22:30:00,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:00,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2931 states and 12125 transitions. [2021-06-05 22:30:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:00,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:00,397 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:00,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:00,597 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:00,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:00,597 INFO L82 PathProgramCache]: Analyzing trace with hash 502192549, now seen corresponding path program 24 times [2021-06-05 22:30:00,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:00,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137020256] [2021-06-05 22:30:00,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:00,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:00,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137020256] [2021-06-05 22:30:00,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137020256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:00,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754676665] [2021-06-05 22:30:00,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:00,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:30:00,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:00,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:00,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:00,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:00,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:00,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:00,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:00,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:00,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:00,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754676665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:00,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:00,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:00,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157585731] [2021-06-05 22:30:00,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:00,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:00,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:00,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:00,913 INFO L87 Difference]: Start difference. First operand 2931 states and 12125 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:01,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:01,782 INFO L93 Difference]: Finished difference Result 3507 states and 14375 transitions. [2021-06-05 22:30:01,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:30:01,782 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:01,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:01,788 INFO L225 Difference]: With dead ends: 3507 [2021-06-05 22:30:01,788 INFO L226 Difference]: Without dead ends: 3481 [2021-06-05 22:30:01,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 734.2ms TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:30:01,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3481 states. [2021-06-05 22:30:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3481 to 2935. [2021-06-05 22:30:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 4.138036809815951) internal successors, (12141), 2934 states have internal predecessors, (12141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:01,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 12141 transitions. [2021-06-05 22:30:01,827 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 12141 transitions. Word has length 23 [2021-06-05 22:30:01,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:01,827 INFO L482 AbstractCegarLoop]: Abstraction has 2935 states and 12141 transitions. [2021-06-05 22:30:01,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:01,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 12141 transitions. [2021-06-05 22:30:01,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:01,831 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:01,831 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:02,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 22:30:02,032 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:02,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:02,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2115759283, now seen corresponding path program 25 times [2021-06-05 22:30:02,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:02,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535683845] [2021-06-05 22:30:02,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:02,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:02,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535683845] [2021-06-05 22:30:02,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535683845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:02,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628452838] [2021-06-05 22:30:02,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:02,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:02,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:02,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:02,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:02,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:02,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:02,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:02,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:02,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628452838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:02,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:02,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:02,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931229053] [2021-06-05 22:30:02,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:02,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:02,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:02,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:02,353 INFO L87 Difference]: Start difference. First operand 2935 states and 12141 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:03,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:03,099 INFO L93 Difference]: Finished difference Result 3535 states and 14493 transitions. [2021-06-05 22:30:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:30:03,099 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:03,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:03,106 INFO L225 Difference]: With dead ends: 3535 [2021-06-05 22:30:03,106 INFO L226 Difference]: Without dead ends: 3514 [2021-06-05 22:30:03,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 678.2ms TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:30:03,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3514 states. [2021-06-05 22:30:03,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3514 to 2923. [2021-06-05 22:30:03,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2922 states have (on average 4.136550308008213) internal successors, (12087), 2922 states have internal predecessors, (12087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 12087 transitions. [2021-06-05 22:30:03,145 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 12087 transitions. Word has length 23 [2021-06-05 22:30:03,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:03,146 INFO L482 AbstractCegarLoop]: Abstraction has 2923 states and 12087 transitions. [2021-06-05 22:30:03,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 12087 transitions. [2021-06-05 22:30:03,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:03,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:03,150 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:03,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:03,350 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:03,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:03,350 INFO L82 PathProgramCache]: Analyzing trace with hash 196245939, now seen corresponding path program 26 times [2021-06-05 22:30:03,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:03,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985528189] [2021-06-05 22:30:03,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:03,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:03,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985528189] [2021-06-05 22:30:03,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985528189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:03,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927707518] [2021-06-05 22:30:03,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:03,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:03,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:03,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:03,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:03,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:03,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:30:03,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:03,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:03,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:03,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:30:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:03,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927707518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:03,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:03,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:03,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148209833] [2021-06-05 22:30:03,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:03,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:03,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:03,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:03,682 INFO L87 Difference]: Start difference. First operand 2923 states and 12087 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:04,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:04,205 INFO L93 Difference]: Finished difference Result 3352 states and 13763 transitions. [2021-06-05 22:30:04,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:30:04,206 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:04,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:04,211 INFO L225 Difference]: With dead ends: 3352 [2021-06-05 22:30:04,212 INFO L226 Difference]: Without dead ends: 3318 [2021-06-05 22:30:04,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 424.8ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:30:04,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2021-06-05 22:30:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 2938. [2021-06-05 22:30:04,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 4.135512427647259) internal successors, (12146), 2937 states have internal predecessors, (12146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:04,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 12146 transitions. [2021-06-05 22:30:04,253 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 12146 transitions. Word has length 23 [2021-06-05 22:30:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:04,254 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 12146 transitions. [2021-06-05 22:30:04,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:04,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 12146 transitions. [2021-06-05 22:30:04,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:04,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:04,258 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:04,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 22:30:04,469 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:04,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:04,469 INFO L82 PathProgramCache]: Analyzing trace with hash 350683457, now seen corresponding path program 27 times [2021-06-05 22:30:04,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:04,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487949038] [2021-06-05 22:30:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:04,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:04,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487949038] [2021-06-05 22:30:04,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487949038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:04,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728442277] [2021-06-05 22:30:04,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:04,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:30:04,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:04,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:04,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:04,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:04,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:30:04,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:04,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:04,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:04,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:30:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:04,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728442277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:04,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:04,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:04,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470568153] [2021-06-05 22:30:04,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:04,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:04,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:04,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:04,771 INFO L87 Difference]: Start difference. First operand 2938 states and 12146 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:05,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:05,471 INFO L93 Difference]: Finished difference Result 3551 states and 14551 transitions. [2021-06-05 22:30:05,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:30:05,472 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:05,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:05,478 INFO L225 Difference]: With dead ends: 3551 [2021-06-05 22:30:05,478 INFO L226 Difference]: Without dead ends: 3521 [2021-06-05 22:30:05,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 515.7ms TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:30:05,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2021-06-05 22:30:05,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 2942. [2021-06-05 22:30:05,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2942 states, 2941 states have (on average 4.136008160489629) internal successors, (12164), 2941 states have internal predecessors, (12164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:05,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 12164 transitions. [2021-06-05 22:30:05,522 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 12164 transitions. Word has length 23 [2021-06-05 22:30:05,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:05,522 INFO L482 AbstractCegarLoop]: Abstraction has 2942 states and 12164 transitions. [2021-06-05 22:30:05,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:05,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 12164 transitions. [2021-06-05 22:30:05,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:05,526 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:05,526 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:05,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:05,727 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:05,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:05,727 INFO L82 PathProgramCache]: Analyzing trace with hash 432082513, now seen corresponding path program 28 times [2021-06-05 22:30:05,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:05,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435693832] [2021-06-05 22:30:05,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:05,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:05,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435693832] [2021-06-05 22:30:05,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435693832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:05,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692083920] [2021-06-05 22:30:05,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:05,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:05,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:05,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:05,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:05,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:05,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:05,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:05,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:05,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:05,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:06,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692083920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:06,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:06,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:06,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145905738] [2021-06-05 22:30:06,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:06,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:06,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:06,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:06,056 INFO L87 Difference]: Start difference. First operand 2942 states and 12164 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:06,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:06,875 INFO L93 Difference]: Finished difference Result 3393 states and 13921 transitions. [2021-06-05 22:30:06,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:30:06,875 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:06,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:06,881 INFO L225 Difference]: With dead ends: 3393 [2021-06-05 22:30:06,881 INFO L226 Difference]: Without dead ends: 3367 [2021-06-05 22:30:06,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 716.3ms TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:30:06,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2021-06-05 22:30:06,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 2946. [2021-06-05 22:30:06,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2945 states have (on average 4.135823429541596) internal successors, (12180), 2945 states have internal predecessors, (12180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:06,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 12180 transitions. [2021-06-05 22:30:06,926 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 12180 transitions. Word has length 23 [2021-06-05 22:30:06,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:06,926 INFO L482 AbstractCegarLoop]: Abstraction has 2946 states and 12180 transitions. [2021-06-05 22:30:06,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:06,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 12180 transitions. [2021-06-05 22:30:06,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:06,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:06,931 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:07,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:07,147 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:07,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:07,148 INFO L82 PathProgramCache]: Analyzing trace with hash 2045649247, now seen corresponding path program 29 times [2021-06-05 22:30:07,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:07,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378764225] [2021-06-05 22:30:07,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:07,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:07,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378764225] [2021-06-05 22:30:07,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378764225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:07,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15235615] [2021-06-05 22:30:07,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:07,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:30:07,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:07,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:07,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:07,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:07,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:07,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:07,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:07,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:07,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:07,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15235615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:07,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:07,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:07,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496467363] [2021-06-05 22:30:07,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:07,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:07,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:07,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:07,485 INFO L87 Difference]: Start difference. First operand 2946 states and 12180 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:08,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:08,265 INFO L93 Difference]: Finished difference Result 3441 states and 14118 transitions. [2021-06-05 22:30:08,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:30:08,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:08,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:08,272 INFO L225 Difference]: With dead ends: 3441 [2021-06-05 22:30:08,272 INFO L226 Difference]: Without dead ends: 3420 [2021-06-05 22:30:08,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 710.0ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:30:08,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2021-06-05 22:30:08,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 2938. [2021-06-05 22:30:08,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 4.135512427647259) internal successors, (12146), 2937 states have internal predecessors, (12146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:08,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 12146 transitions. [2021-06-05 22:30:08,311 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 12146 transitions. Word has length 23 [2021-06-05 22:30:08,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:08,311 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 12146 transitions. [2021-06-05 22:30:08,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:08,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 12146 transitions. [2021-06-05 22:30:08,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:08,315 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:08,315 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:08,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:08,516 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:08,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:08,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1838104447, now seen corresponding path program 30 times [2021-06-05 22:30:08,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:08,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267396826] [2021-06-05 22:30:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:08,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:08,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267396826] [2021-06-05 22:30:08,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267396826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:08,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835549457] [2021-06-05 22:30:08,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:08,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:30:08,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:08,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:08,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:08,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:08,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:30:08,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:08,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:08,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:08,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:30:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:08,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835549457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:08,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:08,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:08,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226966883] [2021-06-05 22:30:08,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:08,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:08,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:08,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:08,927 INFO L87 Difference]: Start difference. First operand 2938 states and 12146 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:09,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:09,684 INFO L93 Difference]: Finished difference Result 3491 states and 14324 transitions. [2021-06-05 22:30:09,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:30:09,684 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:09,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:09,690 INFO L225 Difference]: With dead ends: 3491 [2021-06-05 22:30:09,690 INFO L226 Difference]: Without dead ends: 3469 [2021-06-05 22:30:09,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 642.5ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:30:09,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2021-06-05 22:30:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 2950. [2021-06-05 22:30:09,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2949 states have (on average 4.137673787724652) internal successors, (12202), 2949 states have internal predecessors, (12202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 12202 transitions. [2021-06-05 22:30:09,729 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 12202 transitions. Word has length 23 [2021-06-05 22:30:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:09,729 INFO L482 AbstractCegarLoop]: Abstraction has 2950 states and 12202 transitions. [2021-06-05 22:30:09,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:09,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 12202 transitions. [2021-06-05 22:30:09,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:09,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:09,733 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:09,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:09,934 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:09,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:09,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1252770495, now seen corresponding path program 31 times [2021-06-05 22:30:09,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:09,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198707803] [2021-06-05 22:30:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:10,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:10,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198707803] [2021-06-05 22:30:10,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198707803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:10,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126475600] [2021-06-05 22:30:10,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:10,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:10,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:10,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:10,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:10,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:10,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:10,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:10,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:10,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126475600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:10,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:10,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:10,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295550060] [2021-06-05 22:30:10,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:10,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:10,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:10,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:10,313 INFO L87 Difference]: Start difference. First operand 2950 states and 12202 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:11,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:11,173 INFO L93 Difference]: Finished difference Result 3443 states and 14121 transitions. [2021-06-05 22:30:11,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:30:11,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:11,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:11,180 INFO L225 Difference]: With dead ends: 3443 [2021-06-05 22:30:11,180 INFO L226 Difference]: Without dead ends: 3417 [2021-06-05 22:30:11,180 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 768.4ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:30:11,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2021-06-05 22:30:11,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 2954. [2021-06-05 22:30:11,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 4.13748730104978) internal successors, (12218), 2953 states have internal predecessors, (12218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:11,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 12218 transitions. [2021-06-05 22:30:11,218 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 12218 transitions. Word has length 23 [2021-06-05 22:30:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:11,218 INFO L482 AbstractCegarLoop]: Abstraction has 2954 states and 12218 transitions. [2021-06-05 22:30:11,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:11,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 12218 transitions. [2021-06-05 22:30:11,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:11,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:11,222 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:11,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 22:30:11,423 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:11,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:11,423 INFO L82 PathProgramCache]: Analyzing trace with hash 360796239, now seen corresponding path program 32 times [2021-06-05 22:30:11,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:11,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390516028] [2021-06-05 22:30:11,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:11,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:11,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390516028] [2021-06-05 22:30:11,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390516028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:11,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436641405] [2021-06-05 22:30:11,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:11,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:11,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:11,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:11,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:11,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:11,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:11,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:11,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:11,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:11,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:11,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436641405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:11,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:11,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:11,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347969344] [2021-06-05 22:30:11,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:11,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:11,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:11,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:11,787 INFO L87 Difference]: Start difference. First operand 2954 states and 12218 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:12,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:12,624 INFO L93 Difference]: Finished difference Result 3363 states and 13809 transitions. [2021-06-05 22:30:12,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:30:12,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:12,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:12,631 INFO L225 Difference]: With dead ends: 3363 [2021-06-05 22:30:12,631 INFO L226 Difference]: Without dead ends: 3342 [2021-06-05 22:30:12,631 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 702.1ms TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:30:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2021-06-05 22:30:12,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 2946. [2021-06-05 22:30:12,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2945 states have (on average 4.137181663837012) internal successors, (12184), 2945 states have internal predecessors, (12184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 12184 transitions. [2021-06-05 22:30:12,668 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 12184 transitions. Word has length 23 [2021-06-05 22:30:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:12,668 INFO L482 AbstractCegarLoop]: Abstraction has 2946 states and 12184 transitions. [2021-06-05 22:30:12,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:12,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 12184 transitions. [2021-06-05 22:30:12,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:12,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:12,672 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:12,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 22:30:12,872 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:12,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:12,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1488607069, now seen corresponding path program 33 times [2021-06-05 22:30:12,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:12,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542287715] [2021-06-05 22:30:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:12,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:12,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542287715] [2021-06-05 22:30:12,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542287715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:12,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278000560] [2021-06-05 22:30:12,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:13,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:30:13,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:13,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:13,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:13,133 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:30:13,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 22:30:13,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:13,158 INFO L628 ElimStorePlain]: treesize reduction 70, result has 16.7 percent of original size [2021-06-05 22:30:13,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:13,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 22:30:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:13,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278000560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:13,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:13,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:30:13,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479179935] [2021-06-05 22:30:13,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:30:13,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:13,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:30:13,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:30:13,199 INFO L87 Difference]: Start difference. First operand 2946 states and 12184 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:13,999 INFO L93 Difference]: Finished difference Result 3873 states and 15835 transitions. [2021-06-05 22:30:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:30:13,999 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:13,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:14,006 INFO L225 Difference]: With dead ends: 3873 [2021-06-05 22:30:14,006 INFO L226 Difference]: Without dead ends: 3832 [2021-06-05 22:30:14,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 534.9ms TimeCoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:30:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3832 states. [2021-06-05 22:30:14,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3832 to 2966. [2021-06-05 22:30:14,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2965 states have (on average 4.143338954468803) internal successors, (12285), 2965 states have internal predecessors, (12285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 12285 transitions. [2021-06-05 22:30:14,048 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 12285 transitions. Word has length 23 [2021-06-05 22:30:14,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:14,048 INFO L482 AbstractCegarLoop]: Abstraction has 2966 states and 12285 transitions. [2021-06-05 22:30:14,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:14,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 12285 transitions. [2021-06-05 22:30:14,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:14,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:14,052 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:14,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:14,253 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:14,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:14,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1407208013, now seen corresponding path program 34 times [2021-06-05 22:30:14,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:14,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660716818] [2021-06-05 22:30:14,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:14,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:14,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660716818] [2021-06-05 22:30:14,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660716818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:14,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66635943] [2021-06-05 22:30:14,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:14,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:14,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:14,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:14,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:14,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:14,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:14,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:14,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:14,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:14,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:14,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66635943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:14,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:14,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:14,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277598564] [2021-06-05 22:30:14,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:14,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:14,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:14,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:14,575 INFO L87 Difference]: Start difference. First operand 2966 states and 12285 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:15,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:15,424 INFO L93 Difference]: Finished difference Result 3569 states and 14643 transitions. [2021-06-05 22:30:15,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:30:15,424 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:15,430 INFO L225 Difference]: With dead ends: 3569 [2021-06-05 22:30:15,430 INFO L226 Difference]: Without dead ends: 3543 [2021-06-05 22:30:15,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 752.4ms TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:30:15,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2021-06-05 22:30:15,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 2970. [2021-06-05 22:30:15,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 4.143145840350286) internal successors, (12301), 2969 states have internal predecessors, (12301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 12301 transitions. [2021-06-05 22:30:15,469 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 12301 transitions. Word has length 23 [2021-06-05 22:30:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:15,470 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 12301 transitions. [2021-06-05 22:30:15,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 12301 transitions. [2021-06-05 22:30:15,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:15,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:15,474 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:15,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:15,674 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:15,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:15,674 INFO L82 PathProgramCache]: Analyzing trace with hash 206358721, now seen corresponding path program 35 times [2021-06-05 22:30:15,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:15,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464271096] [2021-06-05 22:30:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:15,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:15,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464271096] [2021-06-05 22:30:15,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464271096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:15,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308464919] [2021-06-05 22:30:15,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:15,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:30:15,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:15,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:15,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:15,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:15,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:15,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:15,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:15,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:15,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:15,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308464919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:15,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:15,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:15,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809602690] [2021-06-05 22:30:15,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:15,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:15,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:15,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:15,972 INFO L87 Difference]: Start difference. First operand 2970 states and 12301 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:16,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:16,718 INFO L93 Difference]: Finished difference Result 3478 states and 14281 transitions. [2021-06-05 22:30:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:30:16,718 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:16,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:16,724 INFO L225 Difference]: With dead ends: 3478 [2021-06-05 22:30:16,724 INFO L226 Difference]: Without dead ends: 3457 [2021-06-05 22:30:16,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 624.7ms TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:30:16,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2021-06-05 22:30:16,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 2958. [2021-06-05 22:30:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2958 states, 2957 states have (on average 4.14169766655394) internal successors, (12247), 2957 states have internal predecessors, (12247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:16,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2958 states to 2958 states and 12247 transitions. [2021-06-05 22:30:16,779 INFO L78 Accepts]: Start accepts. Automaton has 2958 states and 12247 transitions. Word has length 23 [2021-06-05 22:30:16,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:16,779 INFO L482 AbstractCegarLoop]: Abstraction has 2958 states and 12247 transitions. [2021-06-05 22:30:16,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:16,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2958 states and 12247 transitions. [2021-06-05 22:30:16,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:16,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:16,783 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:16,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:16,994 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:16,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:16,995 INFO L82 PathProgramCache]: Analyzing trace with hash -923022959, now seen corresponding path program 36 times [2021-06-05 22:30:16,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:16,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797426608] [2021-06-05 22:30:16,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:17,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:17,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797426608] [2021-06-05 22:30:17,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797426608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:17,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227616212] [2021-06-05 22:30:17,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:17,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:30:17,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:17,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:17,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:17,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:17,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:30:17,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:17,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:17,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:17,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:30:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:17,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227616212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:17,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:17,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:17,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971932236] [2021-06-05 22:30:17,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:17,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:17,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:17,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:17,390 INFO L87 Difference]: Start difference. First operand 2958 states and 12247 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:18,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:18,031 INFO L93 Difference]: Finished difference Result 3433 states and 14112 transitions. [2021-06-05 22:30:18,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:30:18,031 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:18,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:18,037 INFO L225 Difference]: With dead ends: 3433 [2021-06-05 22:30:18,037 INFO L226 Difference]: Without dead ends: 3411 [2021-06-05 22:30:18,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 550.2ms TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:30:18,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-05 22:30:18,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2966. [2021-06-05 22:30:18,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2965 states have (on average 4.141989881956155) internal successors, (12281), 2965 states have internal predecessors, (12281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:18,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 12281 transitions. [2021-06-05 22:30:18,079 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 12281 transitions. Word has length 23 [2021-06-05 22:30:18,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:18,079 INFO L482 AbstractCegarLoop]: Abstraction has 2966 states and 12281 transitions. [2021-06-05 22:30:18,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:18,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 12281 transitions. [2021-06-05 22:30:18,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:18,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:18,084 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:18,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 22:30:18,285 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:18,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:18,285 INFO L82 PathProgramCache]: Analyzing trace with hash -337689007, now seen corresponding path program 37 times [2021-06-05 22:30:18,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:18,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386843487] [2021-06-05 22:30:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:18,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:18,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386843487] [2021-06-05 22:30:18,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386843487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:18,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587657184] [2021-06-05 22:30:18,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:18,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:18,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:18,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:18,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:18,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:18,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:18,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:18,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:18,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587657184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:18,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:18,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:18,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444649675] [2021-06-05 22:30:18,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:18,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:18,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:18,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:18,692 INFO L87 Difference]: Start difference. First operand 2966 states and 12281 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:19,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:19,440 INFO L93 Difference]: Finished difference Result 3412 states and 14013 transitions. [2021-06-05 22:30:19,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:30:19,440 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:19,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:19,446 INFO L225 Difference]: With dead ends: 3412 [2021-06-05 22:30:19,446 INFO L226 Difference]: Without dead ends: 3386 [2021-06-05 22:30:19,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 712.0ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:30:19,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-06-05 22:30:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2970. [2021-06-05 22:30:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 4.141798585382284) internal successors, (12297), 2969 states have internal predecessors, (12297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 12297 transitions. [2021-06-05 22:30:19,484 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 12297 transitions. Word has length 23 [2021-06-05 22:30:19,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:19,484 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 12297 transitions. [2021-06-05 22:30:19,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:19,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 12297 transitions. [2021-06-05 22:30:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:19,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:19,488 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:19,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:19,704 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:19,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:19,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1275877727, now seen corresponding path program 38 times [2021-06-05 22:30:19,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:19,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200772174] [2021-06-05 22:30:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:19,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:19,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200772174] [2021-06-05 22:30:19,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200772174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:19,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007780964] [2021-06-05 22:30:19,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:19,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:19,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:19,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:19,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:19,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:19,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:19,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:19,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:19,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:19,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:20,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007780964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:20,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:20,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:20,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496644445] [2021-06-05 22:30:20,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:20,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:20,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:20,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:20,075 INFO L87 Difference]: Start difference. First operand 2970 states and 12297 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:20,315 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-06-05 22:30:20,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:20,729 INFO L93 Difference]: Finished difference Result 3324 states and 13674 transitions. [2021-06-05 22:30:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:30:20,730 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:20,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:20,735 INFO L225 Difference]: With dead ends: 3324 [2021-06-05 22:30:20,735 INFO L226 Difference]: Without dead ends: 3303 [2021-06-05 22:30:20,735 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 671.3ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:30:20,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3303 states. [2021-06-05 22:30:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3303 to 2962. [2021-06-05 22:30:20,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2961 states have (on average 4.141506247889227) internal successors, (12263), 2961 states have internal predecessors, (12263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:20,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 12263 transitions. [2021-06-05 22:30:20,773 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 12263 transitions. Word has length 23 [2021-06-05 22:30:20,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:20,773 INFO L482 AbstractCegarLoop]: Abstraction has 2962 states and 12263 transitions. [2021-06-05 22:30:20,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:20,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 12263 transitions. [2021-06-05 22:30:20,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:20,777 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:20,777 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:20,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-05 22:30:20,977 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:20,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:20,977 INFO L82 PathProgramCache]: Analyzing trace with hash -768585441, now seen corresponding path program 39 times [2021-06-05 22:30:20,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:20,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928986373] [2021-06-05 22:30:20,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:21,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:21,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928986373] [2021-06-05 22:30:21,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928986373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:21,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268568466] [2021-06-05 22:30:21,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:21,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:30:21,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:21,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:30:21,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:21,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:21,335 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:30:21,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 52 [2021-06-05 22:30:21,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:21,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:21,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:21,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:14 [2021-06-05 22:30:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:21,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268568466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:21,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:21,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:30:21,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317169293] [2021-06-05 22:30:21,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:30:21,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:21,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:30:21,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:30:21,388 INFO L87 Difference]: Start difference. First operand 2962 states and 12263 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:22,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:22,251 INFO L93 Difference]: Finished difference Result 3338 states and 13726 transitions. [2021-06-05 22:30:22,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:30:22,251 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:22,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:22,257 INFO L225 Difference]: With dead ends: 3338 [2021-06-05 22:30:22,257 INFO L226 Difference]: Without dead ends: 3315 [2021-06-05 22:30:22,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 637.0ms TimeCoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:30:22,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2021-06-05 22:30:22,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 2954. [2021-06-05 22:30:22,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 4.14121232644768) internal successors, (12229), 2953 states have internal predecessors, (12229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 12229 transitions. [2021-06-05 22:30:22,294 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 12229 transitions. Word has length 23 [2021-06-05 22:30:22,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:22,294 INFO L482 AbstractCegarLoop]: Abstraction has 2954 states and 12229 transitions. [2021-06-05 22:30:22,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:22,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 12229 transitions. [2021-06-05 22:30:22,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:22,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:22,298 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:22,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:22,499 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:22,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:22,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2129186517, now seen corresponding path program 40 times [2021-06-05 22:30:22,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:22,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054739816] [2021-06-05 22:30:22,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:22,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:22,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054739816] [2021-06-05 22:30:22,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054739816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:22,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134101195] [2021-06-05 22:30:22,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:22,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:22,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:22,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:22,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:22,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:22,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:30:22,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:22,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:22,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:22,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:30:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:22,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134101195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:22,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:22,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:22,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508204119] [2021-06-05 22:30:22,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:22,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:22,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:22,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:22,869 INFO L87 Difference]: Start difference. First operand 2954 states and 12229 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:23,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:23,784 INFO L93 Difference]: Finished difference Result 3650 states and 14966 transitions. [2021-06-05 22:30:23,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:30:23,784 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:23,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:23,790 INFO L225 Difference]: With dead ends: 3650 [2021-06-05 22:30:23,790 INFO L226 Difference]: Without dead ends: 3628 [2021-06-05 22:30:23,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 724.4ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:30:23,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3628 states. [2021-06-05 22:30:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3628 to 2982. [2021-06-05 22:30:23,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 4.145924186514592) internal successors, (12359), 2981 states have internal predecessors, (12359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:23,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 12359 transitions. [2021-06-05 22:30:23,833 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 12359 transitions. Word has length 23 [2021-06-05 22:30:23,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:23,833 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 12359 transitions. [2021-06-05 22:30:23,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 12359 transitions. [2021-06-05 22:30:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:23,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:23,837 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:24,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 22:30:24,037 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:24,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:24,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1580446827, now seen corresponding path program 41 times [2021-06-05 22:30:24,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:24,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702273790] [2021-06-05 22:30:24,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:24,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:24,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702273790] [2021-06-05 22:30:24,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702273790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:24,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508126060] [2021-06-05 22:30:24,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:24,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:30:24,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:24,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:24,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:24,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:24,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:24,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:24,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-06-05 22:30:24,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:24,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:24,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:24,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:73 [2021-06-05 22:30:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:24,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508126060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:24,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:24,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:30:24,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121453471] [2021-06-05 22:30:24,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:30:24,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:24,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:30:24,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:30:24,490 INFO L87 Difference]: Start difference. First operand 2982 states and 12359 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:25,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:25,614 INFO L93 Difference]: Finished difference Result 3408 states and 13968 transitions. [2021-06-05 22:30:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:30:25,615 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:25,620 INFO L225 Difference]: With dead ends: 3408 [2021-06-05 22:30:25,620 INFO L226 Difference]: Without dead ends: 3382 [2021-06-05 22:30:25,621 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1006.5ms TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:30:25,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2021-06-05 22:30:25,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 2986. [2021-06-05 22:30:25,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 4.1457286432160805) internal successors, (12375), 2985 states have internal predecessors, (12375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 12375 transitions. [2021-06-05 22:30:25,658 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 12375 transitions. Word has length 23 [2021-06-05 22:30:25,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:25,658 INFO L482 AbstractCegarLoop]: Abstraction has 2986 states and 12375 transitions. [2021-06-05 22:30:25,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:25,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 12375 transitions. [2021-06-05 22:30:25,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:25,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:25,662 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:25,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:25,862 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:25,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:25,863 INFO L82 PathProgramCache]: Analyzing trace with hash 33119907, now seen corresponding path program 42 times [2021-06-05 22:30:25,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:25,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167971727] [2021-06-05 22:30:25,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:26,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:26,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167971727] [2021-06-05 22:30:26,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167971727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:26,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821345152] [2021-06-05 22:30:26,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:26,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:30:26,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:26,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:30:26,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:26,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:26,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 22:30:26,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:26,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:26,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:26,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:12 [2021-06-05 22:30:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:26,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821345152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:26,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:26,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:30:26,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972005241] [2021-06-05 22:30:26,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:30:26,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:26,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:30:26,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:30:26,240 INFO L87 Difference]: Start difference. First operand 2986 states and 12375 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:26,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:26,814 INFO L93 Difference]: Finished difference Result 3571 states and 14632 transitions. [2021-06-05 22:30:26,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:30:26,814 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:26,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:26,820 INFO L225 Difference]: With dead ends: 3571 [2021-06-05 22:30:26,820 INFO L226 Difference]: Without dead ends: 3550 [2021-06-05 22:30:26,820 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 462.1ms TimeCoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:30:26,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2021-06-05 22:30:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2982. [2021-06-05 22:30:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 4.145924186514592) internal successors, (12359), 2981 states have internal predecessors, (12359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:26,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 12359 transitions. [2021-06-05 22:30:26,859 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 12359 transitions. Word has length 23 [2021-06-05 22:30:26,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:26,859 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 12359 transitions. [2021-06-05 22:30:26,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:26,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 12359 transitions. [2021-06-05 22:30:26,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:26,864 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:26,864 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:27,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 22:30:27,064 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:27,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:27,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1816283401, now seen corresponding path program 43 times [2021-06-05 22:30:27,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:27,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137210874] [2021-06-05 22:30:27,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:27,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:27,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137210874] [2021-06-05 22:30:27,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137210874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:27,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287363571] [2021-06-05 22:30:27,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:27,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:27,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:27,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:27,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:30:27,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:27,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:27,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:27,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:30:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:27,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287363571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:27,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:27,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:27,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576171680] [2021-06-05 22:30:27,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:27,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:27,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:27,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:27,383 INFO L87 Difference]: Start difference. First operand 2982 states and 12359 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:28,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:28,171 INFO L93 Difference]: Finished difference Result 3819 states and 15624 transitions. [2021-06-05 22:30:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:30:28,171 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:28,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:28,178 INFO L225 Difference]: With dead ends: 3819 [2021-06-05 22:30:28,178 INFO L226 Difference]: Without dead ends: 3789 [2021-06-05 22:30:28,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 527.2ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:30:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3789 states. [2021-06-05 22:30:28,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3789 to 2982. [2021-06-05 22:30:28,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 4.145924186514592) internal successors, (12359), 2981 states have internal predecessors, (12359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:28,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 12359 transitions. [2021-06-05 22:30:28,219 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 12359 transitions. Word has length 23 [2021-06-05 22:30:28,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:28,220 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 12359 transitions. [2021-06-05 22:30:28,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:28,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 12359 transitions. [2021-06-05 22:30:28,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:28,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:28,224 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:28,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:28,424 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:28,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:28,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1734884345, now seen corresponding path program 44 times [2021-06-05 22:30:28,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:28,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145833428] [2021-06-05 22:30:28,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:28,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:28,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145833428] [2021-06-05 22:30:28,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145833428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:28,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666789362] [2021-06-05 22:30:28,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:28,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:28,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:28,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:28,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:28,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:28,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:28,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:28,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:28,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:28,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:28,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666789362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:28,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:28,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:28,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824003932] [2021-06-05 22:30:28,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:28,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:28,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:28,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:28,742 INFO L87 Difference]: Start difference. First operand 2982 states and 12359 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:29,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:29,433 INFO L93 Difference]: Finished difference Result 3585 states and 14706 transitions. [2021-06-05 22:30:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:30:29,434 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:29,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:29,440 INFO L225 Difference]: With dead ends: 3585 [2021-06-05 22:30:29,440 INFO L226 Difference]: Without dead ends: 3559 [2021-06-05 22:30:29,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 617.8ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:30:29,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2021-06-05 22:30:29,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 2990. [2021-06-05 22:30:29,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2989 states have (on average 4.146202743392439) internal successors, (12393), 2989 states have internal predecessors, (12393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 12393 transitions. [2021-06-05 22:30:29,479 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 12393 transitions. Word has length 23 [2021-06-05 22:30:29,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:29,479 INFO L482 AbstractCegarLoop]: Abstraction has 2990 states and 12393 transitions. [2021-06-05 22:30:29,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:29,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 12393 transitions. [2021-06-05 22:30:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:29,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:29,483 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:29,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 22:30:29,684 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:29,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:29,684 INFO L82 PathProgramCache]: Analyzing trace with hash -121317611, now seen corresponding path program 45 times [2021-06-05 22:30:29,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:29,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180843474] [2021-06-05 22:30:29,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:29,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:29,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180843474] [2021-06-05 22:30:29,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180843474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:29,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925620138] [2021-06-05 22:30:29,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:29,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:30:29,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:29,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:29,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:29,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:29,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:29,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:29,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:29,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:29,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:29,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925620138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:29,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:29,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:29,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100405145] [2021-06-05 22:30:29,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:29,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:30,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:30,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:30,000 INFO L87 Difference]: Start difference. First operand 2990 states and 12393 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:30,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:30,775 INFO L93 Difference]: Finished difference Result 3586 states and 14697 transitions. [2021-06-05 22:30:30,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:30:30,775 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:30,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:30,782 INFO L225 Difference]: With dead ends: 3586 [2021-06-05 22:30:30,782 INFO L226 Difference]: Without dead ends: 3565 [2021-06-05 22:30:30,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 658.2ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:30:30,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3565 states. [2021-06-05 22:30:30,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3565 to 2990. [2021-06-05 22:30:30,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2989 states have (on average 4.146202743392439) internal successors, (12393), 2989 states have internal predecessors, (12393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:30,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 12393 transitions. [2021-06-05 22:30:30,823 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 12393 transitions. Word has length 23 [2021-06-05 22:30:30,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:30,824 INFO L482 AbstractCegarLoop]: Abstraction has 2990 states and 12393 transitions. [2021-06-05 22:30:30,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:30,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 12393 transitions. [2021-06-05 22:30:30,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:30,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:30,828 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:31,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 22:30:31,028 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:31,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:31,028 INFO L82 PathProgramCache]: Analyzing trace with hash -2040830955, now seen corresponding path program 46 times [2021-06-05 22:30:31,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:31,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649006106] [2021-06-05 22:30:31,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:31,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:31,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649006106] [2021-06-05 22:30:31,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649006106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:31,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111599641] [2021-06-05 22:30:31,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:31,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:31,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:31,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:31,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:31,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:31,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:30:31,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:31,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:31,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:31,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:30:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:31,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111599641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:31,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:31,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:31,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170314319] [2021-06-05 22:30:31,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:31,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:31,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:31,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:31,359 INFO L87 Difference]: Start difference. First operand 2990 states and 12393 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:32,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:32,027 INFO L93 Difference]: Finished difference Result 3478 states and 14275 transitions. [2021-06-05 22:30:32,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:30:32,028 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:32,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:32,034 INFO L225 Difference]: With dead ends: 3478 [2021-06-05 22:30:32,034 INFO L226 Difference]: Without dead ends: 3444 [2021-06-05 22:30:32,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 468.8ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:30:32,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3444 states. [2021-06-05 22:30:32,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3444 to 3002. [2021-06-05 22:30:32,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 4.146617794068644) internal successors, (12444), 3001 states have internal predecessors, (12444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:32,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 12444 transitions. [2021-06-05 22:30:32,073 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 12444 transitions. Word has length 23 [2021-06-05 22:30:32,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:32,073 INFO L482 AbstractCegarLoop]: Abstraction has 3002 states and 12444 transitions. [2021-06-05 22:30:32,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:32,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 12444 transitions. [2021-06-05 22:30:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:32,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:32,077 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:32,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 22:30:32,278 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:32,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:32,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1886393437, now seen corresponding path program 47 times [2021-06-05 22:30:32,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:32,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587275934] [2021-06-05 22:30:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:32,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:32,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587275934] [2021-06-05 22:30:32,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587275934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:32,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013792300] [2021-06-05 22:30:32,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:32,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:30:32,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:32,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:32,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:32,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:32,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:30:32,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:32,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:32,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:32,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:30:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:32,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013792300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:32,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:32,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:32,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558123314] [2021-06-05 22:30:32,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:32,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:32,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:32,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:32,625 INFO L87 Difference]: Start difference. First operand 3002 states and 12444 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:33,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:33,250 INFO L93 Difference]: Finished difference Result 3510 states and 14401 transitions. [2021-06-05 22:30:33,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:30:33,250 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:33,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:33,257 INFO L225 Difference]: With dead ends: 3510 [2021-06-05 22:30:33,257 INFO L226 Difference]: Without dead ends: 3480 [2021-06-05 22:30:33,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 514.8ms TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:30:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-06-05 22:30:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3002. [2021-06-05 22:30:33,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 4.146617794068644) internal successors, (12444), 3001 states have internal predecessors, (12444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:33,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 12444 transitions. [2021-06-05 22:30:33,299 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 12444 transitions. Word has length 23 [2021-06-05 22:30:33,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:33,299 INFO L482 AbstractCegarLoop]: Abstraction has 3002 states and 12444 transitions. [2021-06-05 22:30:33,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:33,299 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 12444 transitions. [2021-06-05 22:30:33,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:33,303 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:33,303 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:33,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:33,504 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:33,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:33,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1804994381, now seen corresponding path program 48 times [2021-06-05 22:30:33,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:33,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575056447] [2021-06-05 22:30:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:33,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:33,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575056447] [2021-06-05 22:30:33,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575056447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:33,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987299251] [2021-06-05 22:30:33,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:33,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:30:33,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:33,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:30:33,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:33,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:33,761 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:30:33,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:30:33,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:33,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:33,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:33,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 22:30:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:33,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987299251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:33,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:33,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:30:33,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726195145] [2021-06-05 22:30:33,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:30:33,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:33,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:30:33,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:30:33,878 INFO L87 Difference]: Start difference. First operand 3002 states and 12444 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:34,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:34,455 INFO L93 Difference]: Finished difference Result 3360 states and 13811 transitions. [2021-06-05 22:30:34,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:30:34,456 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:34,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:34,462 INFO L225 Difference]: With dead ends: 3360 [2021-06-05 22:30:34,462 INFO L226 Difference]: Without dead ends: 3334 [2021-06-05 22:30:34,462 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 514.1ms TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:30:34,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-06-05 22:30:34,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 3010. [2021-06-05 22:30:34,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 4.146892655367232) internal successors, (12478), 3009 states have internal predecessors, (12478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:34,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 12478 transitions. [2021-06-05 22:30:34,501 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 12478 transitions. Word has length 23 [2021-06-05 22:30:34,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:34,501 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 12478 transitions. [2021-06-05 22:30:34,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 12478 transitions. [2021-06-05 22:30:34,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:34,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:34,506 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:34,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:34,706 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:34,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:34,706 INFO L82 PathProgramCache]: Analyzing trace with hash -191427647, now seen corresponding path program 49 times [2021-06-05 22:30:34,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:34,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868278461] [2021-06-05 22:30:34,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:34,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:34,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868278461] [2021-06-05 22:30:34,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868278461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:34,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818649206] [2021-06-05 22:30:34,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:34,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:34,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:34,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:34,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:34,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:34,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:34,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:34,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:35,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818649206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:35,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:35,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:35,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310351405] [2021-06-05 22:30:35,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:35,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:35,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:35,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:35,023 INFO L87 Difference]: Start difference. First operand 3010 states and 12478 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:35,891 INFO L93 Difference]: Finished difference Result 3475 states and 14253 transitions. [2021-06-05 22:30:35,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:30:35,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:35,897 INFO L225 Difference]: With dead ends: 3475 [2021-06-05 22:30:35,897 INFO L226 Difference]: Without dead ends: 3454 [2021-06-05 22:30:35,898 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 685.8ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:30:35,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3454 states. [2021-06-05 22:30:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3454 to 3002. [2021-06-05 22:30:35,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 4.146617794068644) internal successors, (12444), 3001 states have internal predecessors, (12444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 12444 transitions. [2021-06-05 22:30:35,938 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 12444 transitions. Word has length 23 [2021-06-05 22:30:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:35,938 INFO L482 AbstractCegarLoop]: Abstraction has 3002 states and 12444 transitions. [2021-06-05 22:30:35,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:35,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 12444 transitions. [2021-06-05 22:30:35,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:35,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:35,942 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:36,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 22:30:36,142 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:36,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:36,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1046511881, now seen corresponding path program 50 times [2021-06-05 22:30:36,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:36,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957982854] [2021-06-05 22:30:36,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:36,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:36,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957982854] [2021-06-05 22:30:36,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957982854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:36,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039836369] [2021-06-05 22:30:36,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:36,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:36,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:36,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:30:36,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:36,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:36,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:30:36,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:36,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:36,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:36,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:30:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:36,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039836369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:36,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:36,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:36,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441457912] [2021-06-05 22:30:36,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:36,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:36,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:36,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:36,507 INFO L87 Difference]: Start difference. First operand 3002 states and 12444 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:37,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:37,518 INFO L93 Difference]: Finished difference Result 3503 states and 14345 transitions. [2021-06-05 22:30:37,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:30:37,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:37,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:37,524 INFO L225 Difference]: With dead ends: 3503 [2021-06-05 22:30:37,525 INFO L226 Difference]: Without dead ends: 3494 [2021-06-05 22:30:37,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 924.0ms TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:30:37,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3494 states. [2021-06-05 22:30:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3494 to 3084. [2021-06-05 22:30:37,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 4.150827116445021) internal successors, (12797), 3083 states have internal predecessors, (12797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 12797 transitions. [2021-06-05 22:30:37,565 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 12797 transitions. Word has length 23 [2021-06-05 22:30:37,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:37,565 INFO L482 AbstractCegarLoop]: Abstraction has 3084 states and 12797 transitions. [2021-06-05 22:30:37,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:37,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 12797 transitions. [2021-06-05 22:30:37,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:37,570 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:37,570 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:37,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 22:30:37,773 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:37,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:37,773 INFO L82 PathProgramCache]: Analyzing trace with hash -131430393, now seen corresponding path program 51 times [2021-06-05 22:30:37,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:37,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172802939] [2021-06-05 22:30:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:37,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:37,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172802939] [2021-06-05 22:30:37,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172802939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:37,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583935536] [2021-06-05 22:30:37,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:37,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:30:37,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:37,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:30:37,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:38,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:38,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:38,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-06-05 22:30:38,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:38,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:38,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:38,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:12 [2021-06-05 22:30:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:38,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583935536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:38,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:38,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:38,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488228994] [2021-06-05 22:30:38,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:38,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:38,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:38,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:38,044 INFO L87 Difference]: Start difference. First operand 3084 states and 12797 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:38,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:38,594 INFO L93 Difference]: Finished difference Result 3799 states and 15493 transitions. [2021-06-05 22:30:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:30:38,595 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:38,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:38,601 INFO L225 Difference]: With dead ends: 3799 [2021-06-05 22:30:38,601 INFO L226 Difference]: Without dead ends: 3780 [2021-06-05 22:30:38,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 430.9ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:30:38,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2021-06-05 22:30:38,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 3222. [2021-06-05 22:30:38,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3222 states, 3221 states have (on average 4.163924247128221) internal successors, (13412), 3221 states have internal predecessors, (13412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:38,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3222 states to 3222 states and 13412 transitions. [2021-06-05 22:30:38,644 INFO L78 Accepts]: Start accepts. Automaton has 3222 states and 13412 transitions. Word has length 23 [2021-06-05 22:30:38,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:38,644 INFO L482 AbstractCegarLoop]: Abstraction has 3222 states and 13412 transitions. [2021-06-05 22:30:38,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:38,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3222 states and 13412 transitions. [2021-06-05 22:30:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:38,648 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:38,648 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:38,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 22:30:38,849 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:38,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:38,849 INFO L82 PathProgramCache]: Analyzing trace with hash 23007125, now seen corresponding path program 52 times [2021-06-05 22:30:38,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:38,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59258227] [2021-06-05 22:30:38,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:38,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:38,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59258227] [2021-06-05 22:30:38,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59258227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:38,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563633021] [2021-06-05 22:30:38,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:39,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:39,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:39,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:39,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:39,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:39,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:30:39,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:39,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:39,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:39,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:30:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:39,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563633021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:39,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:39,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:39,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404634321] [2021-06-05 22:30:39,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:39,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:39,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:39,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:39,192 INFO L87 Difference]: Start difference. First operand 3222 states and 13412 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:40,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:40,537 INFO L93 Difference]: Finished difference Result 4809 states and 19560 transitions. [2021-06-05 22:30:40,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:30:40,537 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:40,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:40,545 INFO L225 Difference]: With dead ends: 4809 [2021-06-05 22:30:40,545 INFO L226 Difference]: Without dead ends: 4770 [2021-06-05 22:30:40,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1078.6ms TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:30:40,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4770 states. [2021-06-05 22:30:40,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4770 to 3254. [2021-06-05 22:30:40,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3254 states, 3253 states have (on average 4.171841377190286) internal successors, (13571), 3253 states have internal predecessors, (13571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:40,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3254 states to 3254 states and 13571 transitions. [2021-06-05 22:30:40,592 INFO L78 Accepts]: Start accepts. Automaton has 3254 states and 13571 transitions. Word has length 23 [2021-06-05 22:30:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:40,592 INFO L482 AbstractCegarLoop]: Abstraction has 3254 states and 13571 transitions. [2021-06-05 22:30:40,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:40,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3254 states and 13571 transitions. [2021-06-05 22:30:40,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:40,597 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:40,597 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:40,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 22:30:40,797 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:40,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:40,797 INFO L82 PathProgramCache]: Analyzing trace with hash 104406181, now seen corresponding path program 53 times [2021-06-05 22:30:40,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:40,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522553701] [2021-06-05 22:30:40,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:40,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:40,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522553701] [2021-06-05 22:30:40,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522553701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:40,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567645065] [2021-06-05 22:30:40,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:40,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:30:40,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:40,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:40,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:41,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:41,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:41,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:41,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:41,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:41,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:41,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567645065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:41,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:41,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:41,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367430274] [2021-06-05 22:30:41,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:41,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:41,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:41,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:41,111 INFO L87 Difference]: Start difference. First operand 3254 states and 13571 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:42,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:42,611 INFO L93 Difference]: Finished difference Result 4296 states and 17603 transitions. [2021-06-05 22:30:42,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:30:42,612 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:42,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:42,619 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 22:30:42,619 INFO L226 Difference]: Without dead ends: 4261 [2021-06-05 22:30:42,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1287.6ms TimeCoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:30:42,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-06-05 22:30:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 3290. [2021-06-05 22:30:42,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3289 states have (on average 4.176649437519003) internal successors, (13737), 3289 states have internal predecessors, (13737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:42,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 13737 transitions. [2021-06-05 22:30:42,664 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 13737 transitions. Word has length 23 [2021-06-05 22:30:42,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:42,664 INFO L482 AbstractCegarLoop]: Abstraction has 3290 states and 13737 transitions. [2021-06-05 22:30:42,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:42,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 13737 transitions. [2021-06-05 22:30:42,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:42,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:42,668 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:42,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:42,870 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:42,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:42,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1717972915, now seen corresponding path program 54 times [2021-06-05 22:30:42,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:42,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754365230] [2021-06-05 22:30:42,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:42,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:42,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754365230] [2021-06-05 22:30:42,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754365230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:42,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846701586] [2021-06-05 22:30:42,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:42,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:30:42,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:43,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:30:43,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:43,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:43,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:43,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:43,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 22:30:43,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:43,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:43,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:43,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:30:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:43,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846701586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:43,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:43,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:43,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537956922] [2021-06-05 22:30:43,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:43,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:43,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:43,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:43,159 INFO L87 Difference]: Start difference. First operand 3290 states and 13737 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:43,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:43,911 INFO L93 Difference]: Finished difference Result 4047 states and 16638 transitions. [2021-06-05 22:30:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:30:43,911 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:43,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:43,918 INFO L225 Difference]: With dead ends: 4047 [2021-06-05 22:30:43,919 INFO L226 Difference]: Without dead ends: 4015 [2021-06-05 22:30:43,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 690.8ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:30:43,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4015 states. [2021-06-05 22:30:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4015 to 3328. [2021-06-05 22:30:43,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3327 states have (on average 4.179440937781785) internal successors, (13905), 3327 states have internal predecessors, (13905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 13905 transitions. [2021-06-05 22:30:43,968 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 13905 transitions. Word has length 23 [2021-06-05 22:30:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:43,968 INFO L482 AbstractCegarLoop]: Abstraction has 3328 states and 13905 transitions. [2021-06-05 22:30:43,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 13905 transitions. [2021-06-05 22:30:43,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:43,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:43,972 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:44,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:44,173 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:44,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:44,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1054200805, now seen corresponding path program 55 times [2021-06-05 22:30:44,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:44,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023408690] [2021-06-05 22:30:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:44,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:44,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023408690] [2021-06-05 22:30:44,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023408690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:44,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618956692] [2021-06-05 22:30:44,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:44,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:44,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:44,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:44,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:30:44,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:44,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:44,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:44,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:30:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:44,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618956692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:44,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:44,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:44,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743399020] [2021-06-05 22:30:44,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:44,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:44,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:44,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:44,553 INFO L87 Difference]: Start difference. First operand 3328 states and 13905 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:45,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:45,569 INFO L93 Difference]: Finished difference Result 3976 states and 16457 transitions. [2021-06-05 22:30:45,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:30:45,569 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:45,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:45,576 INFO L225 Difference]: With dead ends: 3976 [2021-06-05 22:30:45,576 INFO L226 Difference]: Without dead ends: 3954 [2021-06-05 22:30:45,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 852.7ms TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:30:45,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2021-06-05 22:30:45,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 3340. [2021-06-05 22:30:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3339 states have (on average 4.181191973644804) internal successors, (13961), 3339 states have internal predecessors, (13961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 13961 transitions. [2021-06-05 22:30:45,621 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 13961 transitions. Word has length 23 [2021-06-05 22:30:45,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:45,622 INFO L482 AbstractCegarLoop]: Abstraction has 3340 states and 13961 transitions. [2021-06-05 22:30:45,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:45,622 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 13961 transitions. [2021-06-05 22:30:45,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:45,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:45,626 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:45,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:45,827 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:45,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:45,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1639534757, now seen corresponding path program 56 times [2021-06-05 22:30:45,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:45,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474367782] [2021-06-05 22:30:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:45,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:45,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474367782] [2021-06-05 22:30:45,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474367782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:45,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690593075] [2021-06-05 22:30:45,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:46,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:46,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:46,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:46,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:46,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:46,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:46,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:46,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:46,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:46,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:46,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690593075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:46,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:46,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:46,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440630735] [2021-06-05 22:30:46,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:46,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:46,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:46,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:46,200 INFO L87 Difference]: Start difference. First operand 3340 states and 13961 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:47,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:47,003 INFO L93 Difference]: Finished difference Result 3805 states and 15756 transitions. [2021-06-05 22:30:47,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:30:47,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:47,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:47,009 INFO L225 Difference]: With dead ends: 3805 [2021-06-05 22:30:47,009 INFO L226 Difference]: Without dead ends: 3779 [2021-06-05 22:30:47,010 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 698.0ms TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:30:47,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2021-06-05 22:30:47,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 3344. [2021-06-05 22:30:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 4.1809751720011965) internal successors, (13977), 3343 states have internal predecessors, (13977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:47,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 13977 transitions. [2021-06-05 22:30:47,053 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 13977 transitions. Word has length 23 [2021-06-05 22:30:47,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:47,053 INFO L482 AbstractCegarLoop]: Abstraction has 3344 states and 13977 transitions. [2021-06-05 22:30:47,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 13977 transitions. [2021-06-05 22:30:47,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:47,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:47,058 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:47,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 22:30:47,258 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:47,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:47,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1041865805, now seen corresponding path program 57 times [2021-06-05 22:30:47,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:47,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955490221] [2021-06-05 22:30:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:47,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:47,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955490221] [2021-06-05 22:30:47,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955490221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:47,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077893750] [2021-06-05 22:30:47,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:47,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:30:47,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:47,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:47,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:47,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:47,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:47,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:47,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:47,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:47,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:47,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077893750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:47,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:47,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:47,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028204809] [2021-06-05 22:30:47,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:47,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:47,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:47,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:47,627 INFO L87 Difference]: Start difference. First operand 3344 states and 13977 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:48,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:48,699 INFO L93 Difference]: Finished difference Result 3845 states and 15919 transitions. [2021-06-05 22:30:48,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:30:48,700 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:48,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:48,706 INFO L225 Difference]: With dead ends: 3845 [2021-06-05 22:30:48,706 INFO L226 Difference]: Without dead ends: 3824 [2021-06-05 22:30:48,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 979.3ms TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:30:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3824 states. [2021-06-05 22:30:48,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3824 to 3336. [2021-06-05 22:30:48,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 4.1808095952023985) internal successors, (13943), 3335 states have internal predecessors, (13943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 13943 transitions. [2021-06-05 22:30:48,748 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 13943 transitions. Word has length 23 [2021-06-05 22:30:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:48,748 INFO L482 AbstractCegarLoop]: Abstraction has 3336 states and 13943 transitions. [2021-06-05 22:30:48,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:48,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 13943 transitions. [2021-06-05 22:30:48,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:48,753 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:48,753 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:48,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 22:30:48,953 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:48,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:48,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1403698183, now seen corresponding path program 58 times [2021-06-05 22:30:48,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:48,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326593243] [2021-06-05 22:30:48,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:49,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:49,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326593243] [2021-06-05 22:30:49,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326593243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:49,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403906385] [2021-06-05 22:30:49,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:49,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:49,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:49,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:49,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:49,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:49,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:30:49,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:49,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:49,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:49,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:30:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:49,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403906385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:49,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:49,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:49,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345987735] [2021-06-05 22:30:49,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:49,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:49,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:49,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:49,252 INFO L87 Difference]: Start difference. First operand 3336 states and 13943 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:49,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:49,815 INFO L93 Difference]: Finished difference Result 4068 states and 16800 transitions. [2021-06-05 22:30:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:30:49,815 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:49,822 INFO L225 Difference]: With dead ends: 4068 [2021-06-05 22:30:49,822 INFO L226 Difference]: Without dead ends: 4038 [2021-06-05 22:30:49,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 474.8ms TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:30:49,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4038 states. [2021-06-05 22:30:49,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4038 to 3340. [2021-06-05 22:30:49,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3339 states have (on average 4.181191973644804) internal successors, (13961), 3339 states have internal predecessors, (13961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:49,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 13961 transitions. [2021-06-05 22:30:49,866 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 13961 transitions. Word has length 23 [2021-06-05 22:30:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:49,866 INFO L482 AbstractCegarLoop]: Abstraction has 3340 states and 13961 transitions. [2021-06-05 22:30:49,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:49,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 13961 transitions. [2021-06-05 22:30:49,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:49,871 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:49,871 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:50,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 22:30:50,072 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:50,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:50,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1196303323, now seen corresponding path program 59 times [2021-06-05 22:30:50,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:50,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296099142] [2021-06-05 22:30:50,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:50,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:50,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296099142] [2021-06-05 22:30:50,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296099142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:50,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203004869] [2021-06-05 22:30:50,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:50,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:30:50,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:50,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:50,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:50,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:50,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:50,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:50,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:50,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:50,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:50,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203004869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:50,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:50,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:50,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564794433] [2021-06-05 22:30:50,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:50,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:50,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:50,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:50,396 INFO L87 Difference]: Start difference. First operand 3340 states and 13961 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:51,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:51,236 INFO L93 Difference]: Finished difference Result 3865 states and 16001 transitions. [2021-06-05 22:30:51,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:30:51,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:51,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:51,243 INFO L225 Difference]: With dead ends: 3865 [2021-06-05 22:30:51,243 INFO L226 Difference]: Without dead ends: 3844 [2021-06-05 22:30:51,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 762.9ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:30:51,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2021-06-05 22:30:51,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3340. [2021-06-05 22:30:51,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3339 states have (on average 4.181191973644804) internal successors, (13961), 3339 states have internal predecessors, (13961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:51,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 13961 transitions. [2021-06-05 22:30:51,287 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 13961 transitions. Word has length 23 [2021-06-05 22:30:51,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:51,287 INFO L482 AbstractCegarLoop]: Abstraction has 3340 states and 13961 transitions. [2021-06-05 22:30:51,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:51,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 13961 transitions. [2021-06-05 22:30:51,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:51,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:51,292 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:51,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:51,492 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:51,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:51,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1179150629, now seen corresponding path program 60 times [2021-06-05 22:30:51,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:51,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889592984] [2021-06-05 22:30:51,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:51,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:51,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889592984] [2021-06-05 22:30:51,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889592984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:51,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330441063] [2021-06-05 22:30:51,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:51,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:30:51,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:51,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:30:51,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:51,753 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:30:51,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 22:30:51,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:51,777 INFO L628 ElimStorePlain]: treesize reduction 55, result has 23.6 percent of original size [2021-06-05 22:30:51,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:51,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:17 [2021-06-05 22:30:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:51,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330441063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:51,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:51,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:30:51,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812126184] [2021-06-05 22:30:51,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:30:51,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:51,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:30:51,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:30:51,823 INFO L87 Difference]: Start difference. First operand 3340 states and 13961 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:52,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:52,612 INFO L93 Difference]: Finished difference Result 3828 states and 15851 transitions. [2021-06-05 22:30:52,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:30:52,612 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:52,619 INFO L225 Difference]: With dead ends: 3828 [2021-06-05 22:30:52,619 INFO L226 Difference]: Without dead ends: 3794 [2021-06-05 22:30:52,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 500.4ms TimeCoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:30:52,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3794 states. [2021-06-05 22:30:52,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3794 to 3344. [2021-06-05 22:30:52,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 4.1809751720011965) internal successors, (13977), 3343 states have internal predecessors, (13977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:52,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 13977 transitions. [2021-06-05 22:30:52,674 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 13977 transitions. Word has length 23 [2021-06-05 22:30:52,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:52,674 INFO L482 AbstractCegarLoop]: Abstraction has 3344 states and 13977 transitions. [2021-06-05 22:30:52,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:52,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 13977 transitions. [2021-06-05 22:30:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:52,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:52,678 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:52,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:52,879 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:52,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:52,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1333588147, now seen corresponding path program 61 times [2021-06-05 22:30:52,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:52,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084040795] [2021-06-05 22:30:52,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:53,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:53,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084040795] [2021-06-05 22:30:53,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084040795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:53,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148586773] [2021-06-05 22:30:53,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:53,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:53,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:53,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:53,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:30:53,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:53,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:53,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:53,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:30:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:53,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148586773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:53,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:53,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:53,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395522515] [2021-06-05 22:30:53,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:53,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:53,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:53,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:53,225 INFO L87 Difference]: Start difference. First operand 3344 states and 13977 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:53,708 INFO L93 Difference]: Finished difference Result 3857 states and 15959 transitions. [2021-06-05 22:30:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:30:53,708 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:53,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:53,715 INFO L225 Difference]: With dead ends: 3857 [2021-06-05 22:30:53,715 INFO L226 Difference]: Without dead ends: 3827 [2021-06-05 22:30:53,715 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 432.0ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:30:53,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2021-06-05 22:30:53,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 3348. [2021-06-05 22:30:53,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3348 states, 3347 states have (on average 4.181356438601733) internal successors, (13995), 3347 states have internal predecessors, (13995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:53,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3348 states to 3348 states and 13995 transitions. [2021-06-05 22:30:53,758 INFO L78 Accepts]: Start accepts. Automaton has 3348 states and 13995 transitions. Word has length 23 [2021-06-05 22:30:53,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:53,758 INFO L482 AbstractCegarLoop]: Abstraction has 3348 states and 13995 transitions. [2021-06-05 22:30:53,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:53,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3348 states and 13995 transitions. [2021-06-05 22:30:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:53,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:53,763 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:53,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 22:30:53,963 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:53,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:53,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1414987203, now seen corresponding path program 62 times [2021-06-05 22:30:53,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:53,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892471083] [2021-06-05 22:30:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:54,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:54,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892471083] [2021-06-05 22:30:54,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892471083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:54,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77416566] [2021-06-05 22:30:54,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:54,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:54,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:54,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:54,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:54,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:54,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:54,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:54,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:54,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:54,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:54,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77416566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:54,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:54,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:54,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397467877] [2021-06-05 22:30:54,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:54,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:54,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:54,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:54,264 INFO L87 Difference]: Start difference. First operand 3348 states and 13995 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:54,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:54,889 INFO L93 Difference]: Finished difference Result 3716 states and 15408 transitions. [2021-06-05 22:30:54,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:30:54,890 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:54,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:54,896 INFO L225 Difference]: With dead ends: 3716 [2021-06-05 22:30:54,896 INFO L226 Difference]: Without dead ends: 3690 [2021-06-05 22:30:54,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 522.8ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:30:54,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3690 states. [2021-06-05 22:30:54,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3690 to 3352. [2021-06-05 22:30:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3351 states have (on average 4.181139958221427) internal successors, (14011), 3351 states have internal predecessors, (14011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 14011 transitions. [2021-06-05 22:30:54,955 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 14011 transitions. Word has length 23 [2021-06-05 22:30:54,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:54,955 INFO L482 AbstractCegarLoop]: Abstraction has 3352 states and 14011 transitions. [2021-06-05 22:30:54,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:54,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 14011 transitions. [2021-06-05 22:30:54,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:54,960 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:54,960 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:55,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 22:30:55,160 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:55,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:55,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1266413359, now seen corresponding path program 63 times [2021-06-05 22:30:55,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:55,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738791588] [2021-06-05 22:30:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:55,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:55,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738791588] [2021-06-05 22:30:55,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738791588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:55,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347452920] [2021-06-05 22:30:55,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:55,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:30:55,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:55,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:55,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:55,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:55,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:55,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:55,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:55,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:55,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:55,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347452920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:55,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:55,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:55,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39333310] [2021-06-05 22:30:55,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:55,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:55,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:55,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:55,480 INFO L87 Difference]: Start difference. First operand 3352 states and 14011 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:56,331 INFO L93 Difference]: Finished difference Result 3760 states and 15583 transitions. [2021-06-05 22:30:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:30:56,331 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:56,338 INFO L225 Difference]: With dead ends: 3760 [2021-06-05 22:30:56,338 INFO L226 Difference]: Without dead ends: 3739 [2021-06-05 22:30:56,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 724.4ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:30:56,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-06-05 22:30:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3352. [2021-06-05 22:30:56,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3351 states have (on average 4.181139958221427) internal successors, (14011), 3351 states have internal predecessors, (14011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:56,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 14011 transitions. [2021-06-05 22:30:56,382 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 14011 transitions. Word has length 23 [2021-06-05 22:30:56,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:56,382 INFO L482 AbstractCegarLoop]: Abstraction has 3352 states and 14011 transitions. [2021-06-05 22:30:56,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:56,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 14011 transitions. [2021-06-05 22:30:56,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:56,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:56,387 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:56,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:56,589 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:56,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:56,589 INFO L82 PathProgramCache]: Analyzing trace with hash -855199757, now seen corresponding path program 64 times [2021-06-05 22:30:56,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:56,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22442012] [2021-06-05 22:30:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:56,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:56,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22442012] [2021-06-05 22:30:56,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22442012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:56,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226976529] [2021-06-05 22:30:56,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:56,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:56,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:56,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:56,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:56,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:56,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:30:56,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:56,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:56,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:56,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:30:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:56,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226976529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:56,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:56,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:56,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065211621] [2021-06-05 22:30:56,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:56,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:56,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:56,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:56,940 INFO L87 Difference]: Start difference. First operand 3352 states and 14011 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:57,807 INFO L93 Difference]: Finished difference Result 3955 states and 16375 transitions. [2021-06-05 22:30:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:30:57,807 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:57,813 INFO L225 Difference]: With dead ends: 3955 [2021-06-05 22:30:57,814 INFO L226 Difference]: Without dead ends: 3933 [2021-06-05 22:30:57,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 773.0ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:30:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3933 states. [2021-06-05 22:30:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3933 to 3356. [2021-06-05 22:30:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 4.181520119225037) internal successors, (14029), 3355 states have internal predecessors, (14029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:57,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 14029 transitions. [2021-06-05 22:30:57,859 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 14029 transitions. Word has length 23 [2021-06-05 22:30:57,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:57,859 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 14029 transitions. [2021-06-05 22:30:57,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:57,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 14029 transitions. [2021-06-05 22:30:57,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:57,864 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:57,864 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:58,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-06-05 22:30:58,064 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:58,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:58,064 INFO L82 PathProgramCache]: Analyzing trace with hash -269865805, now seen corresponding path program 65 times [2021-06-05 22:30:58,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:58,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31149199] [2021-06-05 22:30:58,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:58,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:58,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31149199] [2021-06-05 22:30:58,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31149199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:58,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035332070] [2021-06-05 22:30:58,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:58,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:30:58,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:58,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:30:58,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:58,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:58,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:30:58,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:58,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:58,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:58,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:30:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:58,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035332070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:58,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:58,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:30:58,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544506599] [2021-06-05 22:30:58,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:30:58,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:58,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:30:58,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:58,461 INFO L87 Difference]: Start difference. First operand 3356 states and 14029 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:59,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:59,203 INFO L93 Difference]: Finished difference Result 3899 states and 16126 transitions. [2021-06-05 22:30:59,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:30:59,204 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:30:59,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:59,210 INFO L225 Difference]: With dead ends: 3899 [2021-06-05 22:30:59,210 INFO L226 Difference]: Without dead ends: 3873 [2021-06-05 22:30:59,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 727.0ms TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:30:59,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3873 states. [2021-06-05 22:30:59,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3873 to 3360. [2021-06-05 22:30:59,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 4.18130395951176) internal successors, (14045), 3359 states have internal predecessors, (14045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 14045 transitions. [2021-06-05 22:30:59,254 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 14045 transitions. Word has length 23 [2021-06-05 22:30:59,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:59,254 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 14045 transitions. [2021-06-05 22:30:59,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:59,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 14045 transitions. [2021-06-05 22:30:59,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:30:59,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:59,259 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:59,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 22:30:59,459 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:59,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:59,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1343700929, now seen corresponding path program 66 times [2021-06-05 22:30:59,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:59,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198974049] [2021-06-05 22:30:59,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:59,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:59,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198974049] [2021-06-05 22:30:59,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198974049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:59,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905450807] [2021-06-05 22:30:59,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:59,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:30:59,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:59,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:30:59,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:59,778 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 22:30:59,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 64 [2021-06-05 22:30:59,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:59,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:59,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:59,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:48 [2021-06-05 22:30:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:59,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905450807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:59,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:59,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:30:59,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768489269] [2021-06-05 22:30:59,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:30:59,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:59,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:30:59,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:30:59,868 INFO L87 Difference]: Start difference. First operand 3360 states and 14045 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:00,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:00,895 INFO L93 Difference]: Finished difference Result 3778 states and 15654 transitions. [2021-06-05 22:31:00,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:31:00,895 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:00,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:00,901 INFO L225 Difference]: With dead ends: 3778 [2021-06-05 22:31:00,901 INFO L226 Difference]: Without dead ends: 3757 [2021-06-05 22:31:00,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 867.7ms TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:31:00,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3757 states. [2021-06-05 22:31:00,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3757 to 3352. [2021-06-05 22:31:00,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3351 states have (on average 4.181139958221427) internal successors, (14011), 3351 states have internal predecessors, (14011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:00,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 14011 transitions. [2021-06-05 22:31:00,944 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 14011 transitions. Word has length 23 [2021-06-05 22:31:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:00,944 INFO L482 AbstractCegarLoop]: Abstraction has 3352 states and 14011 transitions. [2021-06-05 22:31:00,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:00,944 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 14011 transitions. [2021-06-05 22:31:00,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:00,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:00,949 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:01,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 22:31:01,149 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:01,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:01,149 INFO L82 PathProgramCache]: Analyzing trace with hash -424303323, now seen corresponding path program 67 times [2021-06-05 22:31:01,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:01,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117424711] [2021-06-05 22:31:01,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:01,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:01,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:01,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117424711] [2021-06-05 22:31:01,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117424711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:01,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352319420] [2021-06-05 22:31:01,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:01,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:01,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:01,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:01,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:01,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:01,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:01,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:01,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:01,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352319420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:01,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:01,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:01,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640208580] [2021-06-05 22:31:01,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:01,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:01,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:01,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:01,449 INFO L87 Difference]: Start difference. First operand 3352 states and 14011 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:02,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:02,159 INFO L93 Difference]: Finished difference Result 3875 states and 16039 transitions. [2021-06-05 22:31:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:31:02,159 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:02,166 INFO L225 Difference]: With dead ends: 3875 [2021-06-05 22:31:02,166 INFO L226 Difference]: Without dead ends: 3849 [2021-06-05 22:31:02,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 577.3ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:31:02,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2021-06-05 22:31:02,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 3356. [2021-06-05 22:31:02,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 4.180923994038748) internal successors, (14027), 3355 states have internal predecessors, (14027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:02,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 14027 transitions. [2021-06-05 22:31:02,210 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 14027 transitions. Word has length 23 [2021-06-05 22:31:02,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:02,210 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 14027 transitions. [2021-06-05 22:31:02,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:02,211 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 14027 transitions. [2021-06-05 22:31:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:02,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:02,215 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:02,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 22:31:02,416 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:02,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:02,416 INFO L82 PathProgramCache]: Analyzing trace with hash 59881731, now seen corresponding path program 68 times [2021-06-05 22:31:02,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:02,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217615174] [2021-06-05 22:31:02,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:02,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:02,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:02,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217615174] [2021-06-05 22:31:02,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217615174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:02,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671901962] [2021-06-05 22:31:02,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:02,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:02,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:02,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:02,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:02,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:02,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:31:02,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:02,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:02,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:02,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:31:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:02,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671901962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:02,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:02,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:02,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077113889] [2021-06-05 22:31:02,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:02,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:02,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:02,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:02,799 INFO L87 Difference]: Start difference. First operand 3356 states and 14027 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:03,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:03,475 INFO L93 Difference]: Finished difference Result 3877 states and 16068 transitions. [2021-06-05 22:31:03,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:31:03,476 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:03,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:03,482 INFO L225 Difference]: With dead ends: 3877 [2021-06-05 22:31:03,483 INFO L226 Difference]: Without dead ends: 3855 [2021-06-05 22:31:03,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 629.4ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:31:03,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2021-06-05 22:31:03,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 3364. [2021-06-05 22:31:03,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3364 states, 3363 states have (on average 4.181088314005352) internal successors, (14061), 3363 states have internal predecessors, (14061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:03,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3364 states to 3364 states and 14061 transitions. [2021-06-05 22:31:03,529 INFO L78 Accepts]: Start accepts. Automaton has 3364 states and 14061 transitions. Word has length 23 [2021-06-05 22:31:03,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:03,529 INFO L482 AbstractCegarLoop]: Abstraction has 3364 states and 14061 transitions. [2021-06-05 22:31:03,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:03,529 INFO L276 IsEmpty]: Start isEmpty. Operand 3364 states and 14061 transitions. [2021-06-05 22:31:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:03,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:03,534 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:03,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:03,749 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:03,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:03,749 INFO L82 PathProgramCache]: Analyzing trace with hash 645215683, now seen corresponding path program 69 times [2021-06-05 22:31:03,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:03,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133881303] [2021-06-05 22:31:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:03,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:03,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133881303] [2021-06-05 22:31:03,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133881303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:03,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310295520] [2021-06-05 22:31:03,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:03,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:31:03,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:03,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:31:03,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:04,051 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 22:31:04,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 64 [2021-06-05 22:31:04,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:04,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:04,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:04,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:48 [2021-06-05 22:31:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:04,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310295520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:04,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:04,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:31:04,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229519048] [2021-06-05 22:31:04,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:31:04,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:04,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:31:04,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:31:04,180 INFO L87 Difference]: Start difference. First operand 3364 states and 14061 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:05,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:05,024 INFO L93 Difference]: Finished difference Result 3711 states and 15368 transitions. [2021-06-05 22:31:05,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:31:05,024 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:05,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:05,031 INFO L225 Difference]: With dead ends: 3711 [2021-06-05 22:31:05,031 INFO L226 Difference]: Without dead ends: 3685 [2021-06-05 22:31:05,031 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 724.7ms TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:31:05,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3685 states. [2021-06-05 22:31:05,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3685 to 3368. [2021-06-05 22:31:05,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3367 states have (on average 4.1808731808731805) internal successors, (14077), 3367 states have internal predecessors, (14077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:05,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 14077 transitions. [2021-06-05 22:31:05,073 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 14077 transitions. Word has length 23 [2021-06-05 22:31:05,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:05,073 INFO L482 AbstractCegarLoop]: Abstraction has 3368 states and 14077 transitions. [2021-06-05 22:31:05,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 14077 transitions. [2021-06-05 22:31:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:05,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:05,078 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:05,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:05,281 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:05,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:05,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2036184879, now seen corresponding path program 70 times [2021-06-05 22:31:05,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:05,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768508205] [2021-06-05 22:31:05,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:05,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:05,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768508205] [2021-06-05 22:31:05,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768508205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:05,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689046270] [2021-06-05 22:31:05,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:05,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:05,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:05,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:05,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:05,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:05,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:05,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:05,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:05,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:05,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:05,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689046270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:05,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:05,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:05,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670928769] [2021-06-05 22:31:05,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:05,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:05,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:05,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:05,640 INFO L87 Difference]: Start difference. First operand 3368 states and 14077 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:06,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:06,518 INFO L93 Difference]: Finished difference Result 3766 states and 15611 transitions. [2021-06-05 22:31:06,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:31:06,519 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:06,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:06,525 INFO L225 Difference]: With dead ends: 3766 [2021-06-05 22:31:06,525 INFO L226 Difference]: Without dead ends: 3745 [2021-06-05 22:31:06,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 779.6ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:31:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2021-06-05 22:31:06,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3360. [2021-06-05 22:31:06,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 4.180708544209586) internal successors, (14043), 3359 states have internal predecessors, (14043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:06,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 14043 transitions. [2021-06-05 22:31:06,569 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 14043 transitions. Word has length 23 [2021-06-05 22:31:06,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:06,569 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 14043 transitions. [2021-06-05 22:31:06,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:06,569 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 14043 transitions. [2021-06-05 22:31:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:06,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:06,574 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:06,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 22:31:06,774 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:06,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:06,774 INFO L82 PathProgramCache]: Analyzing trace with hash 214319249, now seen corresponding path program 71 times [2021-06-05 22:31:06,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:06,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244234595] [2021-06-05 22:31:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:06,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:06,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244234595] [2021-06-05 22:31:06,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244234595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:06,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210092616] [2021-06-05 22:31:06,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:06,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:31:06,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:06,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:06,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:07,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:07,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:31:07,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:07,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:07,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:07,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:31:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:07,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210092616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:07,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:07,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:07,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894730264] [2021-06-05 22:31:07,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:07,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:07,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:07,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:07,158 INFO L87 Difference]: Start difference. First operand 3360 states and 14043 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:07,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:07,707 INFO L93 Difference]: Finished difference Result 3765 states and 15626 transitions. [2021-06-05 22:31:07,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:31:07,707 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:07,714 INFO L225 Difference]: With dead ends: 3765 [2021-06-05 22:31:07,714 INFO L226 Difference]: Without dead ends: 3742 [2021-06-05 22:31:07,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 489.0ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:31:07,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2021-06-05 22:31:07,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 3366. [2021-06-05 22:31:07,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3365 states have (on average 4.180980683506687) internal successors, (14069), 3365 states have internal predecessors, (14069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:07,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 14069 transitions. [2021-06-05 22:31:07,758 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 14069 transitions. Word has length 23 [2021-06-05 22:31:07,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:07,758 INFO L482 AbstractCegarLoop]: Abstraction has 3366 states and 14069 transitions. [2021-06-05 22:31:07,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:07,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 14069 transitions. [2021-06-05 22:31:07,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:07,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:07,763 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:07,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 22:31:07,963 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:07,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:07,963 INFO L82 PathProgramCache]: Analyzing trace with hash -614814159, now seen corresponding path program 1 times [2021-06-05 22:31:07,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:07,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571711839] [2021-06-05 22:31:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:08,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:08,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571711839] [2021-06-05 22:31:08,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571711839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:08,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327486693] [2021-06-05 22:31:08,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:08,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:08,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:08,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:08,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:31:08,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:08,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:08,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:08,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:31:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:08,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327486693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:08,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:08,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:08,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602871286] [2021-06-05 22:31:08,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:08,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:08,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:08,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:08,286 INFO L87 Difference]: Start difference. First operand 3366 states and 14069 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:08,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:08,909 INFO L93 Difference]: Finished difference Result 3716 states and 15432 transitions. [2021-06-05 22:31:08,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:31:08,910 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:08,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:08,916 INFO L225 Difference]: With dead ends: 3716 [2021-06-05 22:31:08,916 INFO L226 Difference]: Without dead ends: 3701 [2021-06-05 22:31:08,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 531.3ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:31:08,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3701 states. [2021-06-05 22:31:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3701 to 3372. [2021-06-05 22:31:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3372 states, 3371 states have (on average 4.1809552061702755) internal successors, (14094), 3371 states have internal predecessors, (14094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:08,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 14094 transitions. [2021-06-05 22:31:08,960 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 14094 transitions. Word has length 23 [2021-06-05 22:31:08,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:08,960 INFO L482 AbstractCegarLoop]: Abstraction has 3372 states and 14094 transitions. [2021-06-05 22:31:08,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:08,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 14094 transitions. [2021-06-05 22:31:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:08,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:08,964 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:09,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:09,165 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:09,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:09,165 INFO L82 PathProgramCache]: Analyzing trace with hash -749602063, now seen corresponding path program 2 times [2021-06-05 22:31:09,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:09,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805637786] [2021-06-05 22:31:09,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:09,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:09,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805637786] [2021-06-05 22:31:09,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805637786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:09,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100682399] [2021-06-05 22:31:09,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:09,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:09,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:09,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:09,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:09,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:09,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2021-06-05 22:31:09,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:09,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:09,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:31:09,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:10 [2021-06-05 22:31:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:09,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100682399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:09,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:09,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:31:09,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382895209] [2021-06-05 22:31:09,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:31:09,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:09,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:31:09,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:31:09,532 INFO L87 Difference]: Start difference. First operand 3372 states and 14094 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:10,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:10,076 INFO L93 Difference]: Finished difference Result 3718 states and 15442 transitions. [2021-06-05 22:31:10,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:31:10,076 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:10,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:10,083 INFO L225 Difference]: With dead ends: 3718 [2021-06-05 22:31:10,083 INFO L226 Difference]: Without dead ends: 3703 [2021-06-05 22:31:10,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 463.0ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:31:10,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3703 states. [2021-06-05 22:31:10,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3703 to 3386. [2021-06-05 22:31:10,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3386 states, 3385 states have (on average 4.181683899556869) internal successors, (14155), 3385 states have internal predecessors, (14155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:10,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3386 states to 3386 states and 14155 transitions. [2021-06-05 22:31:10,129 INFO L78 Accepts]: Start accepts. Automaton has 3386 states and 14155 transitions. Word has length 23 [2021-06-05 22:31:10,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:10,129 INFO L482 AbstractCegarLoop]: Abstraction has 3386 states and 14155 transitions. [2021-06-05 22:31:10,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:10,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3386 states and 14155 transitions. [2021-06-05 22:31:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:10,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:10,134 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:10,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:10,336 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:10,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:10,336 INFO L82 PathProgramCache]: Analyzing trace with hash -164268111, now seen corresponding path program 3 times [2021-06-05 22:31:10,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:10,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247437072] [2021-06-05 22:31:10,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:10,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:10,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:10,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247437072] [2021-06-05 22:31:10,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247437072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:10,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329813664] [2021-06-05 22:31:10,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:10,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:31:10,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:10,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:10,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:10,618 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 22:31:10,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 64 [2021-06-05 22:31:10,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:10,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:10,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:10,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:40 [2021-06-05 22:31:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:10,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329813664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:10,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:10,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:31:10,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836532860] [2021-06-05 22:31:10,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:31:10,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:10,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:31:10,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:31:10,737 INFO L87 Difference]: Start difference. First operand 3386 states and 14155 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:11,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:11,551 INFO L93 Difference]: Finished difference Result 3761 states and 15604 transitions. [2021-06-05 22:31:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:31:11,551 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:11,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:11,557 INFO L225 Difference]: With dead ends: 3761 [2021-06-05 22:31:11,558 INFO L226 Difference]: Without dead ends: 3739 [2021-06-05 22:31:11,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 713.2ms TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:31:11,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-06-05 22:31:11,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3398. [2021-06-05 22:31:11,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3398 states, 3397 states have (on average 4.181630850750662) internal successors, (14205), 3397 states have internal predecessors, (14205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:11,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3398 states to 3398 states and 14205 transitions. [2021-06-05 22:31:11,604 INFO L78 Accepts]: Start accepts. Automaton has 3398 states and 14205 transitions. Word has length 23 [2021-06-05 22:31:11,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:11,604 INFO L482 AbstractCegarLoop]: Abstraction has 3398 states and 14205 transitions. [2021-06-05 22:31:11,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3398 states and 14205 transitions. [2021-06-05 22:31:11,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:11,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:11,609 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:11,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 22:31:11,809 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:11,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:11,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1449298623, now seen corresponding path program 4 times [2021-06-05 22:31:11,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:11,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374026190] [2021-06-05 22:31:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:11,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:11,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374026190] [2021-06-05 22:31:11,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374026190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:11,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104241811] [2021-06-05 22:31:11,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:11,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:11,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:11,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:11,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:12,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:12,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:12,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:12,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:12,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:12,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:12,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104241811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:12,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:12,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:12,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124814077] [2021-06-05 22:31:12,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:12,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:12,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:12,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:12,180 INFO L87 Difference]: Start difference. First operand 3398 states and 14205 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:13,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:13,173 INFO L93 Difference]: Finished difference Result 3671 states and 15256 transitions. [2021-06-05 22:31:13,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:31:13,173 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:13,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:13,180 INFO L225 Difference]: With dead ends: 3671 [2021-06-05 22:31:13,180 INFO L226 Difference]: Without dead ends: 3656 [2021-06-05 22:31:13,180 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 854.0ms TimeCoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:31:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2021-06-05 22:31:13,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 3394. [2021-06-05 22:31:13,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3394 states, 3393 states have (on average 4.181255526083112) internal successors, (14187), 3393 states have internal predecessors, (14187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3394 states to 3394 states and 14187 transitions. [2021-06-05 22:31:13,222 INFO L78 Accepts]: Start accepts. Automaton has 3394 states and 14187 transitions. Word has length 23 [2021-06-05 22:31:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:13,222 INFO L482 AbstractCegarLoop]: Abstraction has 3394 states and 14187 transitions. [2021-06-05 22:31:13,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3394 states and 14187 transitions. [2021-06-05 22:31:13,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:13,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:13,227 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:13,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:13,427 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:13,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:13,427 INFO L82 PathProgramCache]: Analyzing trace with hash -595164545, now seen corresponding path program 5 times [2021-06-05 22:31:13,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:13,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233826961] [2021-06-05 22:31:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:13,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:13,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233826961] [2021-06-05 22:31:13,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233826961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:13,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610958194] [2021-06-05 22:31:13,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:13,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:13,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:13,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:13,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:13,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:13,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:31:13,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:13,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:13,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:13,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:31:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:13,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610958194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:13,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:13,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:13,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203225952] [2021-06-05 22:31:13,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:13,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:13,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:13,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:13,747 INFO L87 Difference]: Start difference. First operand 3394 states and 14187 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:14,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:14,377 INFO L93 Difference]: Finished difference Result 3711 states and 15412 transitions. [2021-06-05 22:31:14,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:31:14,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:14,383 INFO L225 Difference]: With dead ends: 3711 [2021-06-05 22:31:14,384 INFO L226 Difference]: Without dead ends: 3696 [2021-06-05 22:31:14,384 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 540.2ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:31:14,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3696 states. [2021-06-05 22:31:14,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3696 to 3386. [2021-06-05 22:31:14,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3386 states, 3385 states have (on average 4.18109305760709) internal successors, (14153), 3385 states have internal predecessors, (14153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:14,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3386 states to 3386 states and 14153 transitions. [2021-06-05 22:31:14,426 INFO L78 Accepts]: Start accepts. Automaton has 3386 states and 14153 transitions. Word has length 23 [2021-06-05 22:31:14,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:14,427 INFO L482 AbstractCegarLoop]: Abstraction has 3386 states and 14153 transitions. [2021-06-05 22:31:14,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:14,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3386 states and 14153 transitions. [2021-06-05 22:31:14,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:14,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:14,431 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:14,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:14,632 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:14,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:14,632 INFO L82 PathProgramCache]: Analyzing trace with hash 244717011, now seen corresponding path program 6 times [2021-06-05 22:31:14,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:14,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534182493] [2021-06-05 22:31:14,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:14,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:14,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534182493] [2021-06-05 22:31:14,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534182493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:14,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238936948] [2021-06-05 22:31:14,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:14,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:31:14,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:14,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:14,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:14,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:14,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:31:14,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:14,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:14,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:14,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:31:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:14,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238936948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:14,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:14,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:14,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766224454] [2021-06-05 22:31:14,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:14,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:14,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:14,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:14,978 INFO L87 Difference]: Start difference. First operand 3386 states and 14153 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:15,739 INFO L93 Difference]: Finished difference Result 4088 states and 16918 transitions. [2021-06-05 22:31:15,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:31:15,739 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:15,746 INFO L225 Difference]: With dead ends: 4088 [2021-06-05 22:31:15,746 INFO L226 Difference]: Without dead ends: 4066 [2021-06-05 22:31:15,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 678.7ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:31:15,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4066 states. [2021-06-05 22:31:15,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4066 to 3406. [2021-06-05 22:31:15,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 4.182966226138032) internal successors, (14243), 3405 states have internal predecessors, (14243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:15,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 14243 transitions. [2021-06-05 22:31:15,791 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 14243 transitions. Word has length 23 [2021-06-05 22:31:15,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:15,791 INFO L482 AbstractCegarLoop]: Abstraction has 3406 states and 14243 transitions. [2021-06-05 22:31:15,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 14243 transitions. [2021-06-05 22:31:15,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:15,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:15,796 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:15,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:16,004 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:16,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:16,005 INFO L82 PathProgramCache]: Analyzing trace with hash 830050963, now seen corresponding path program 7 times [2021-06-05 22:31:16,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:16,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717159730] [2021-06-05 22:31:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:16,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:16,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717159730] [2021-06-05 22:31:16,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717159730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:16,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070173802] [2021-06-05 22:31:16,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:16,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:16,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:16,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:16,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:16,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:16,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:16,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:16,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:16,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070173802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:16,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:16,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:16,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289436649] [2021-06-05 22:31:16,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:16,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:16,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:16,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:16,357 INFO L87 Difference]: Start difference. First operand 3406 states and 14243 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:17,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:17,261 INFO L93 Difference]: Finished difference Result 3955 states and 16374 transitions. [2021-06-05 22:31:17,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:31:17,261 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:17,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:17,268 INFO L225 Difference]: With dead ends: 3955 [2021-06-05 22:31:17,268 INFO L226 Difference]: Without dead ends: 3929 [2021-06-05 22:31:17,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 826.4ms TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:31:17,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3929 states. [2021-06-05 22:31:17,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3929 to 3410. [2021-06-05 22:31:17,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3409 states have (on average 4.1827515400410675) internal successors, (14259), 3409 states have internal predecessors, (14259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:17,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 14259 transitions. [2021-06-05 22:31:17,312 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 14259 transitions. Word has length 23 [2021-06-05 22:31:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:17,312 INFO L482 AbstractCegarLoop]: Abstraction has 3410 states and 14259 transitions. [2021-06-05 22:31:17,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 14259 transitions. [2021-06-05 22:31:17,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:17,317 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:17,317 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:17,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:17,521 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:17,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1851349599, now seen corresponding path program 8 times [2021-06-05 22:31:17,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:17,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278175346] [2021-06-05 22:31:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:17,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:17,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278175346] [2021-06-05 22:31:17,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278175346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:17,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824483305] [2021-06-05 22:31:17,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:17,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:17,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:17,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:17,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:17,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:17,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:17,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:17,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:17,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:17,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:17,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824483305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:17,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:17,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:17,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700248042] [2021-06-05 22:31:17,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:17,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:17,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:17,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:17,856 INFO L87 Difference]: Start difference. First operand 3410 states and 14259 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:18,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:18,989 INFO L93 Difference]: Finished difference Result 3935 states and 16300 transitions. [2021-06-05 22:31:18,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:31:18,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:18,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:18,997 INFO L225 Difference]: With dead ends: 3935 [2021-06-05 22:31:18,997 INFO L226 Difference]: Without dead ends: 3914 [2021-06-05 22:31:18,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 865.9ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:31:19,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2021-06-05 22:31:19,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 3402. [2021-06-05 22:31:19,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 4.182593354895619) internal successors, (14225), 3401 states have internal predecessors, (14225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:19,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 14225 transitions. [2021-06-05 22:31:19,061 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 14225 transitions. Word has length 23 [2021-06-05 22:31:19,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:19,061 INFO L482 AbstractCegarLoop]: Abstraction has 3402 states and 14225 transitions. [2021-06-05 22:31:19,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:19,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 14225 transitions. [2021-06-05 22:31:19,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:19,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:19,066 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:19,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 22:31:19,266 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:19,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:19,267 INFO L82 PathProgramCache]: Analyzing trace with hash 594214389, now seen corresponding path program 9 times [2021-06-05 22:31:19,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:19,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43064878] [2021-06-05 22:31:19,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:19,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:19,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43064878] [2021-06-05 22:31:19,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43064878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:19,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323530015] [2021-06-05 22:31:19,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:19,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:31:19,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:19,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:31:19,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:19,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:19,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:19,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:19,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2021-06-05 22:31:19,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:19,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:19,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:19,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-06-05 22:31:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:19,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323530015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:19,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:19,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:19,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452518513] [2021-06-05 22:31:19,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:19,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:19,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:19,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:19,586 INFO L87 Difference]: Start difference. First operand 3402 states and 14225 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:20,161 INFO L93 Difference]: Finished difference Result 4084 states and 16893 transitions. [2021-06-05 22:31:20,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:31:20,162 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:20,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:20,169 INFO L225 Difference]: With dead ends: 4084 [2021-06-05 22:31:20,169 INFO L226 Difference]: Without dead ends: 4053 [2021-06-05 22:31:20,169 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:31:20,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2021-06-05 22:31:20,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 3417. [2021-06-05 22:31:20,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 4.182377049180328) internal successors, (14287), 3416 states have internal predecessors, (14287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:20,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 14287 transitions. [2021-06-05 22:31:20,215 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 14287 transitions. Word has length 23 [2021-06-05 22:31:20,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:20,215 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 14287 transitions. [2021-06-05 22:31:20,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:20,215 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 14287 transitions. [2021-06-05 22:31:20,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:20,220 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:20,220 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:20,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:20,420 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:20,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:20,421 INFO L82 PathProgramCache]: Analyzing trace with hash 675613445, now seen corresponding path program 10 times [2021-06-05 22:31:20,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:20,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872825663] [2021-06-05 22:31:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:20,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:20,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872825663] [2021-06-05 22:31:20,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872825663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:20,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267394840] [2021-06-05 22:31:20,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:20,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:20,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:20,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:20,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:20,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:20,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:20,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:20,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:20,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:20,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:20,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267394840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:20,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:20,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:20,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349546849] [2021-06-05 22:31:20,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:20,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:20,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:20,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:20,759 INFO L87 Difference]: Start difference. First operand 3417 states and 14287 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:21,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:21,704 INFO L93 Difference]: Finished difference Result 3968 states and 16422 transitions. [2021-06-05 22:31:21,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:31:21,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:21,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:21,711 INFO L225 Difference]: With dead ends: 3968 [2021-06-05 22:31:21,711 INFO L226 Difference]: Without dead ends: 3942 [2021-06-05 22:31:21,711 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 899.5ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:31:21,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3942 states. [2021-06-05 22:31:21,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3942 to 3421. [2021-06-05 22:31:21,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3421 states, 3420 states have (on average 4.182163742690059) internal successors, (14303), 3420 states have internal predecessors, (14303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3421 states to 3421 states and 14303 transitions. [2021-06-05 22:31:21,757 INFO L78 Accepts]: Start accepts. Automaton has 3421 states and 14303 transitions. Word has length 23 [2021-06-05 22:31:21,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:21,757 INFO L482 AbstractCegarLoop]: Abstraction has 3421 states and 14303 transitions. [2021-06-05 22:31:21,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:21,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3421 states and 14303 transitions. [2021-06-05 22:31:21,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:21,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:21,762 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:21,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 22:31:21,963 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:21,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:21,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2005787117, now seen corresponding path program 11 times [2021-06-05 22:31:21,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:21,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730797867] [2021-06-05 22:31:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:22,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:22,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730797867] [2021-06-05 22:31:22,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730797867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:22,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446434375] [2021-06-05 22:31:22,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:22,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:31:22,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:22,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:31:22,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:22,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:22,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 22:31:22,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:22,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:22,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:22,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:12 [2021-06-05 22:31:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:22,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446434375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:22,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:22,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:31:22,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029694715] [2021-06-05 22:31:22,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:31:22,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:22,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:31:22,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:31:22,319 INFO L87 Difference]: Start difference. First operand 3421 states and 14303 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:22,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:22,882 INFO L93 Difference]: Finished difference Result 3940 states and 16315 transitions. [2021-06-05 22:31:22,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:31:22,883 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:22,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:22,889 INFO L225 Difference]: With dead ends: 3940 [2021-06-05 22:31:22,889 INFO L226 Difference]: Without dead ends: 3919 [2021-06-05 22:31:22,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 447.9ms TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:31:22,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3919 states. [2021-06-05 22:31:22,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3919 to 3409. [2021-06-05 22:31:22,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3409 states, 3408 states have (on average 4.181044600938967) internal successors, (14249), 3408 states have internal predecessors, (14249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3409 states to 3409 states and 14249 transitions. [2021-06-05 22:31:22,933 INFO L78 Accepts]: Start accepts. Automaton has 3409 states and 14249 transitions. Word has length 23 [2021-06-05 22:31:22,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:22,933 INFO L482 AbstractCegarLoop]: Abstraction has 3409 states and 14249 transitions. [2021-06-05 22:31:22,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:22,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3409 states and 14249 transitions. [2021-06-05 22:31:22,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:22,938 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:22,938 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:23,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:23,138 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:23,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:23,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1159798499, now seen corresponding path program 12 times [2021-06-05 22:31:23,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:23,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044069638] [2021-06-05 22:31:23,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:23,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:23,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044069638] [2021-06-05 22:31:23,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044069638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:23,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995124854] [2021-06-05 22:31:23,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:23,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:31:23,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:23,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:23,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:23,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:23,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:31:23,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:23,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:23,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:23,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:31:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:23,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995124854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:23,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:23,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:23,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530215987] [2021-06-05 22:31:23,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:23,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:23,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:23,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:23,464 INFO L87 Difference]: Start difference. First operand 3409 states and 14249 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:24,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:24,125 INFO L93 Difference]: Finished difference Result 3908 states and 16196 transitions. [2021-06-05 22:31:24,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:31:24,129 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:24,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:24,136 INFO L225 Difference]: With dead ends: 3908 [2021-06-05 22:31:24,136 INFO L226 Difference]: Without dead ends: 3886 [2021-06-05 22:31:24,136 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 554.6ms TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:31:24,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3886 states. [2021-06-05 22:31:24,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3886 to 3417. [2021-06-05 22:31:24,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 4.181206088992974) internal successors, (14283), 3416 states have internal predecessors, (14283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 14283 transitions. [2021-06-05 22:31:24,181 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 14283 transitions. Word has length 23 [2021-06-05 22:31:24,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:24,181 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 14283 transitions. [2021-06-05 22:31:24,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 14283 transitions. [2021-06-05 22:31:24,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:24,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:24,186 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:24,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:24,386 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:24,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:24,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1745132451, now seen corresponding path program 13 times [2021-06-05 22:31:24,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:24,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111548548] [2021-06-05 22:31:24,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:24,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:24,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111548548] [2021-06-05 22:31:24,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111548548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:24,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540974112] [2021-06-05 22:31:24,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:24,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:24,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:24,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:24,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:24,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:24,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:24,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:24,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:24,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540974112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:24,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:24,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:24,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324924425] [2021-06-05 22:31:24,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:24,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:24,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:24,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:24,739 INFO L87 Difference]: Start difference. First operand 3417 states and 14283 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:25,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:25,547 INFO L93 Difference]: Finished difference Result 3820 states and 15834 transitions. [2021-06-05 22:31:25,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:31:25,547 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:25,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:25,554 INFO L225 Difference]: With dead ends: 3820 [2021-06-05 22:31:25,554 INFO L226 Difference]: Without dead ends: 3794 [2021-06-05 22:31:25,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 767.3ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:31:25,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3794 states. [2021-06-05 22:31:25,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3794 to 3421. [2021-06-05 22:31:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3421 states, 3420 states have (on average 4.180994152046783) internal successors, (14299), 3420 states have internal predecessors, (14299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3421 states to 3421 states and 14299 transitions. [2021-06-05 22:31:25,597 INFO L78 Accepts]: Start accepts. Automaton has 3421 states and 14299 transitions. Word has length 23 [2021-06-05 22:31:25,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:25,597 INFO L482 AbstractCegarLoop]: Abstraction has 3421 states and 14299 transitions. [2021-06-05 22:31:25,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:25,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3421 states and 14299 transitions. [2021-06-05 22:31:25,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:25,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:25,602 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:25,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 22:31:25,802 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:25,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:25,802 INFO L82 PathProgramCache]: Analyzing trace with hash -936268111, now seen corresponding path program 14 times [2021-06-05 22:31:25,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:25,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432331274] [2021-06-05 22:31:25,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:25,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:25,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432331274] [2021-06-05 22:31:25,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432331274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:25,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068038191] [2021-06-05 22:31:25,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:25,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:25,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:25,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:25,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:26,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:26,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:26,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:26,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:26,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:26,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:26,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068038191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:26,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:26,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:26,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944672124] [2021-06-05 22:31:26,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:26,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:26,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:26,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:26,138 INFO L87 Difference]: Start difference. First operand 3421 states and 14299 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:26,411 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-06-05 22:31:27,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:27,040 INFO L93 Difference]: Finished difference Result 3796 states and 15744 transitions. [2021-06-05 22:31:27,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:31:27,041 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:27,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:27,047 INFO L225 Difference]: With dead ends: 3796 [2021-06-05 22:31:27,047 INFO L226 Difference]: Without dead ends: 3775 [2021-06-05 22:31:27,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 775.7ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:31:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-06-05 22:31:27,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 3413. [2021-06-05 22:31:27,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 4.180832356389215) internal successors, (14265), 3412 states have internal predecessors, (14265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:27,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 14265 transitions. [2021-06-05 22:31:27,090 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 14265 transitions. Word has length 23 [2021-06-05 22:31:27,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:27,090 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 14265 transitions. [2021-06-05 22:31:27,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:27,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 14265 transitions. [2021-06-05 22:31:27,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:27,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:27,095 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:27,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 22:31:27,296 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:27,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:27,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1314236017, now seen corresponding path program 15 times [2021-06-05 22:31:27,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:27,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936067591] [2021-06-05 22:31:27,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:27,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:27,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936067591] [2021-06-05 22:31:27,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936067591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:27,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772312644] [2021-06-05 22:31:27,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:27,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:31:27,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:27,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:31:27,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:27,586 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 22:31:27,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 65 [2021-06-05 22:31:27,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:27,606 INFO L628 ElimStorePlain]: treesize reduction 39, result has 26.4 percent of original size [2021-06-05 22:31:27,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:27,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:14 [2021-06-05 22:31:27,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:27,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772312644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:27,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:27,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:31:27,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752894278] [2021-06-05 22:31:27,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:31:27,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:27,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:31:27,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:31:27,649 INFO L87 Difference]: Start difference. First operand 3413 states and 14265 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:28,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:28,149 INFO L93 Difference]: Finished difference Result 3707 states and 15400 transitions. [2021-06-05 22:31:28,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:31:28,149 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:28,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:28,155 INFO L225 Difference]: With dead ends: 3707 [2021-06-05 22:31:28,155 INFO L226 Difference]: Without dead ends: 3684 [2021-06-05 22:31:28,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 413.6ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:31:28,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3684 states. [2021-06-05 22:31:28,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3684 to 3401. [2021-06-05 22:31:28,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3401 states, 3400 states have (on average 4.179705882352941) internal successors, (14211), 3400 states have internal predecessors, (14211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 14211 transitions. [2021-06-05 22:31:28,198 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 14211 transitions. Word has length 23 [2021-06-05 22:31:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:28,198 INFO L482 AbstractCegarLoop]: Abstraction has 3401 states and 14211 transitions. [2021-06-05 22:31:28,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 14211 transitions. [2021-06-05 22:31:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:28,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:28,203 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:28,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:28,403 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:28,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:28,403 INFO L82 PathProgramCache]: Analyzing trace with hash -924097361, now seen corresponding path program 7 times [2021-06-05 22:31:28,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:28,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099556508] [2021-06-05 22:31:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:28,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:28,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099556508] [2021-06-05 22:31:28,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099556508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:28,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988861117] [2021-06-05 22:31:28,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:28,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:28,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:28,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:28,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:31:28,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:28,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:28,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:28,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:31:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:28,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988861117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:28,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:28,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:28,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771854018] [2021-06-05 22:31:28,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:28,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:28,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:28,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:28,773 INFO L87 Difference]: Start difference. First operand 3401 states and 14211 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:29,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:29,332 INFO L93 Difference]: Finished difference Result 3778 states and 15679 transitions. [2021-06-05 22:31:29,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:31:29,333 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:29,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:29,339 INFO L225 Difference]: With dead ends: 3778 [2021-06-05 22:31:29,339 INFO L226 Difference]: Without dead ends: 3761 [2021-06-05 22:31:29,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 487.9ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:31:29,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-05 22:31:29,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 3433. [2021-06-05 22:31:29,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3433 states, 3432 states have (on average 4.181235431235431) internal successors, (14350), 3432 states have internal predecessors, (14350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 14350 transitions. [2021-06-05 22:31:29,383 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 14350 transitions. Word has length 23 [2021-06-05 22:31:29,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:29,383 INFO L482 AbstractCegarLoop]: Abstraction has 3433 states and 14350 transitions. [2021-06-05 22:31:29,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:29,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 14350 transitions. [2021-06-05 22:31:29,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:29,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:29,387 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:29,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:29,588 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:29,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:29,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1346031629, now seen corresponding path program 8 times [2021-06-05 22:31:29,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:29,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511579010] [2021-06-05 22:31:29,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:29,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:29,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511579010] [2021-06-05 22:31:29,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511579010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:29,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970331123] [2021-06-05 22:31:29,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:29,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:29,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:29,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:31:29,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:29,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:29,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:29,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:29,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:29,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 33 [2021-06-05 22:31:29,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:29,881 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.5 percent of original size [2021-06-05 22:31:29,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:29,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:42 [2021-06-05 22:31:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:29,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970331123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:29,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:29,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:31:29,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73544996] [2021-06-05 22:31:29,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:31:29,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:29,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:31:29,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:31:29,958 INFO L87 Difference]: Start difference. First operand 3433 states and 14350 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:30,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:30,489 INFO L93 Difference]: Finished difference Result 3990 states and 16510 transitions. [2021-06-05 22:31:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:31:30,490 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:30,496 INFO L225 Difference]: With dead ends: 3990 [2021-06-05 22:31:30,496 INFO L226 Difference]: Without dead ends: 3949 [2021-06-05 22:31:30,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 450.3ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:31:30,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3949 states. [2021-06-05 22:31:30,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3949 to 3469. [2021-06-05 22:31:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3469 states, 3468 states have (on average 4.1833910034602075) internal successors, (14508), 3468 states have internal predecessors, (14508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3469 states to 3469 states and 14508 transitions. [2021-06-05 22:31:30,542 INFO L78 Accepts]: Start accepts. Automaton has 3469 states and 14508 transitions. Word has length 23 [2021-06-05 22:31:30,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:30,542 INFO L482 AbstractCegarLoop]: Abstraction has 3469 states and 14508 transitions. [2021-06-05 22:31:30,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:30,542 INFO L276 IsEmpty]: Start isEmpty. Operand 3469 states and 14508 transitions. [2021-06-05 22:31:30,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:30,546 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:30,547 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:30,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:30,747 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:30,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:30,747 INFO L82 PathProgramCache]: Analyzing trace with hash 2042774707, now seen corresponding path program 9 times [2021-06-05 22:31:30,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:30,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106470866] [2021-06-05 22:31:30,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:30,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:30,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106470866] [2021-06-05 22:31:30,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106470866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:30,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843223789] [2021-06-05 22:31:30,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:30,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:31:30,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:30,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:30,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:31,027 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:31:31,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 22:31:31,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:31,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:31,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:31,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:38 [2021-06-05 22:31:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:31,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843223789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:31,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:31,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:31:31,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133118441] [2021-06-05 22:31:31,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:31:31,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:31,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:31:31,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:31:31,164 INFO L87 Difference]: Start difference. First operand 3469 states and 14508 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:32,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:32,090 INFO L93 Difference]: Finished difference Result 4269 states and 17622 transitions. [2021-06-05 22:31:32,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:31:32,090 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:32,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:32,098 INFO L225 Difference]: With dead ends: 4269 [2021-06-05 22:31:32,098 INFO L226 Difference]: Without dead ends: 4213 [2021-06-05 22:31:32,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 724.0ms TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:31:32,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4213 states. [2021-06-05 22:31:32,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4213 to 3492. [2021-06-05 22:31:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 4.182182755657405) internal successors, (14600), 3491 states have internal predecessors, (14600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:32,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 14600 transitions. [2021-06-05 22:31:32,145 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 14600 transitions. Word has length 23 [2021-06-05 22:31:32,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:32,146 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 14600 transitions. [2021-06-05 22:31:32,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:32,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 14600 transitions. [2021-06-05 22:31:32,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:32,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:32,150 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:32,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 22:31:32,351 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:32,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:32,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1176481433, now seen corresponding path program 10 times [2021-06-05 22:31:32,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:32,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534507948] [2021-06-05 22:31:32,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:32,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:32,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534507948] [2021-06-05 22:31:32,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534507948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:32,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696283228] [2021-06-05 22:31:32,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:32,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:32,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:32,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:32,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:32,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:32,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:32,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:32,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:32,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:32,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:32,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696283228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:32,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:32,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:32,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131909902] [2021-06-05 22:31:32,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:32,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:32,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:32,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:32,688 INFO L87 Difference]: Start difference. First operand 3492 states and 14600 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:33,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:33,499 INFO L93 Difference]: Finished difference Result 3951 states and 16393 transitions. [2021-06-05 22:31:33,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:31:33,499 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:33,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:33,506 INFO L225 Difference]: With dead ends: 3951 [2021-06-05 22:31:33,506 INFO L226 Difference]: Without dead ends: 3928 [2021-06-05 22:31:33,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 718.0ms TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:31:33,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2021-06-05 22:31:33,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 3486. [2021-06-05 22:31:33,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3486 states, 3485 states have (on average 4.182496413199426) internal successors, (14576), 3485 states have internal predecessors, (14576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:33,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 14576 transitions. [2021-06-05 22:31:33,552 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 14576 transitions. Word has length 23 [2021-06-05 22:31:33,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:33,552 INFO L482 AbstractCegarLoop]: Abstraction has 3486 states and 14576 transitions. [2021-06-05 22:31:33,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:33,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 14576 transitions. [2021-06-05 22:31:33,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:33,557 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:33,557 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:33,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 22:31:33,757 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:33,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:33,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1620238247, now seen corresponding path program 11 times [2021-06-05 22:31:33,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:33,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752148224] [2021-06-05 22:31:33,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:33,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:33,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752148224] [2021-06-05 22:31:33,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752148224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:33,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516404970] [2021-06-05 22:31:33,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:33,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:31:33,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:33,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:33,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:34,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:34,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:31:34,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:34,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:34,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:34,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:31:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:34,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516404970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:34,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:34,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:34,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513799688] [2021-06-05 22:31:34,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:34,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:34,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:34,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:34,082 INFO L87 Difference]: Start difference. First operand 3486 states and 14576 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:34,698 INFO L93 Difference]: Finished difference Result 4019 states and 16669 transitions. [2021-06-05 22:31:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:31:34,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:34,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:34,705 INFO L225 Difference]: With dead ends: 4019 [2021-06-05 22:31:34,705 INFO L226 Difference]: Without dead ends: 3994 [2021-06-05 22:31:34,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 528.9ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:31:34,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3994 states. [2021-06-05 22:31:34,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3994 to 3490. [2021-06-05 22:31:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3490 states, 3489 states have (on average 4.182287188306105) internal successors, (14592), 3489 states have internal predecessors, (14592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3490 states to 3490 states and 14592 transitions. [2021-06-05 22:31:34,750 INFO L78 Accepts]: Start accepts. Automaton has 3490 states and 14592 transitions. Word has length 23 [2021-06-05 22:31:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:34,750 INFO L482 AbstractCegarLoop]: Abstraction has 3490 states and 14592 transitions. [2021-06-05 22:31:34,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:34,751 INFO L276 IsEmpty]: Start isEmpty. Operand 3490 states and 14592 transitions. [2021-06-05 22:31:34,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:34,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:34,755 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:34,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-05 22:31:34,956 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:34,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1605375419, now seen corresponding path program 12 times [2021-06-05 22:31:34,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:34,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377127286] [2021-06-05 22:31:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:35,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:35,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377127286] [2021-06-05 22:31:35,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377127286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:35,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079978851] [2021-06-05 22:31:35,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:35,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:31:35,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:35,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:35,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:35,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:35,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:31:35,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:35,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:35,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:35,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:31:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:35,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079978851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:35,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:35,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:35,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766132578] [2021-06-05 22:31:35,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:35,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:35,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:35,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:35,271 INFO L87 Difference]: Start difference. First operand 3490 states and 14592 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:36,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:36,020 INFO L93 Difference]: Finished difference Result 4384 states and 18075 transitions. [2021-06-05 22:31:36,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:31:36,020 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:36,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:36,028 INFO L225 Difference]: With dead ends: 4384 [2021-06-05 22:31:36,028 INFO L226 Difference]: Without dead ends: 4349 [2021-06-05 22:31:36,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 563.6ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:31:36,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2021-06-05 22:31:36,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 3518. [2021-06-05 22:31:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3518 states, 3517 states have (on average 4.182541939152687) internal successors, (14710), 3517 states have internal predecessors, (14710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:36,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 14710 transitions. [2021-06-05 22:31:36,076 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 14710 transitions. Word has length 23 [2021-06-05 22:31:36,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:36,077 INFO L482 AbstractCegarLoop]: Abstraction has 3518 states and 14710 transitions. [2021-06-05 22:31:36,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:36,077 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 14710 transitions. [2021-06-05 22:31:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:36,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:36,081 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:36,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 22:31:36,282 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:36,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:36,282 INFO L82 PathProgramCache]: Analyzing trace with hash -2101846555, now seen corresponding path program 13 times [2021-06-05 22:31:36,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:36,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296806802] [2021-06-05 22:31:36,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:36,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:36,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296806802] [2021-06-05 22:31:36,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296806802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:36,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019490231] [2021-06-05 22:31:36,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:36,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:36,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:36,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:36,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:36,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:36,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:36,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:36,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:36,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019490231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:36,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:36,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:36,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410471823] [2021-06-05 22:31:36,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:36,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:36,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:36,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:36,605 INFO L87 Difference]: Start difference. First operand 3518 states and 14710 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:37,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:37,377 INFO L93 Difference]: Finished difference Result 4183 states and 17298 transitions. [2021-06-05 22:31:37,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:31:37,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:37,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:37,385 INFO L225 Difference]: With dead ends: 4183 [2021-06-05 22:31:37,385 INFO L226 Difference]: Without dead ends: 4155 [2021-06-05 22:31:37,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 689.3ms TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:31:37,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-05 22:31:37,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3524. [2021-06-05 22:31:37,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3524 states, 3523 states have (on average 4.182231053079762) internal successors, (14734), 3523 states have internal predecessors, (14734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:37,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3524 states to 3524 states and 14734 transitions. [2021-06-05 22:31:37,438 INFO L78 Accepts]: Start accepts. Automaton has 3524 states and 14734 transitions. Word has length 23 [2021-06-05 22:31:37,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:37,438 INFO L482 AbstractCegarLoop]: Abstraction has 3524 states and 14734 transitions. [2021-06-05 22:31:37,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:37,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3524 states and 14734 transitions. [2021-06-05 22:31:37,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:37,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:37,443 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:37,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 22:31:37,643 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:37,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:37,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1026135399, now seen corresponding path program 14 times [2021-06-05 22:31:37,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:37,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767706342] [2021-06-05 22:31:37,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:37,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:37,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767706342] [2021-06-05 22:31:37,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767706342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:37,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888296704] [2021-06-05 22:31:37,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:37,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:37,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:37,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:37,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:37,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:37,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:37,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:37,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:37,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:37,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:37,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888296704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:37,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:37,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:37,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989974957] [2021-06-05 22:31:37,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:37,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:37,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:37,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:37,972 INFO L87 Difference]: Start difference. First operand 3524 states and 14734 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:38,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:38,877 INFO L93 Difference]: Finished difference Result 4150 states and 17172 transitions. [2021-06-05 22:31:38,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:31:38,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:38,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:38,885 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 22:31:38,885 INFO L226 Difference]: Without dead ends: 4127 [2021-06-05 22:31:38,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 649.1ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:31:38,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2021-06-05 22:31:38,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 3528. [2021-06-05 22:31:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 4.182024383328608) internal successors, (14750), 3527 states have internal predecessors, (14750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:38,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 14750 transitions. [2021-06-05 22:31:38,931 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 14750 transitions. Word has length 23 [2021-06-05 22:31:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:38,931 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 14750 transitions. [2021-06-05 22:31:38,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:38,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 14750 transitions. [2021-06-05 22:31:38,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:38,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:38,936 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:39,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:39,136 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:39,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:39,137 INFO L82 PathProgramCache]: Analyzing trace with hash -181439147, now seen corresponding path program 15 times [2021-06-05 22:31:39,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:39,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603874078] [2021-06-05 22:31:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:39,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:39,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603874078] [2021-06-05 22:31:39,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603874078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:39,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511089115] [2021-06-05 22:31:39,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:39,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:31:39,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:39,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:31:39,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:39,413 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 22:31:39,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 66 [2021-06-05 22:31:39,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:39,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:39,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:39,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:14 [2021-06-05 22:31:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:39,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511089115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:39,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:39,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:31:39,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302916741] [2021-06-05 22:31:39,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:31:39,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:39,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:31:39,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:31:39,465 INFO L87 Difference]: Start difference. First operand 3528 states and 14750 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:40,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:40,155 INFO L93 Difference]: Finished difference Result 4348 states and 17995 transitions. [2021-06-05 22:31:40,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:31:40,155 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:40,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:40,163 INFO L225 Difference]: With dead ends: 4348 [2021-06-05 22:31:40,164 INFO L226 Difference]: Without dead ends: 4324 [2021-06-05 22:31:40,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 493.4ms TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:31:40,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2021-06-05 22:31:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 3552. [2021-06-05 22:31:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3552 states, 3551 states have (on average 4.18445508307519) internal successors, (14859), 3551 states have internal predecessors, (14859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:40,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 14859 transitions. [2021-06-05 22:31:40,214 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 14859 transitions. Word has length 23 [2021-06-05 22:31:40,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:40,214 INFO L482 AbstractCegarLoop]: Abstraction has 3552 states and 14859 transitions. [2021-06-05 22:31:40,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 14859 transitions. [2021-06-05 22:31:40,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:40,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:40,219 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:40,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 22:31:40,419 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:40,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:40,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1087600107, now seen corresponding path program 16 times [2021-06-05 22:31:40,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:40,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80711494] [2021-06-05 22:31:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:40,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:40,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80711494] [2021-06-05 22:31:40,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80711494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:40,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014746445] [2021-06-05 22:31:40,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 22:31:40,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:40,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:40,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:40,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:40,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:40,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:40,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:40,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:40,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:40,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:40,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014746445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:40,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:40,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:40,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67065940] [2021-06-05 22:31:40,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:40,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:40,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:40,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:40,797 INFO L87 Difference]: Start difference. First operand 3552 states and 14859 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:41,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:41,543 INFO L93 Difference]: Finished difference Result 4096 states and 16971 transitions. [2021-06-05 22:31:41,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:31:41,543 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:41,550 INFO L225 Difference]: With dead ends: 4096 [2021-06-05 22:31:41,550 INFO L226 Difference]: Without dead ends: 4068 [2021-06-05 22:31:41,550 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 682.0ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:31:41,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4068 states. [2021-06-05 22:31:41,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4068 to 3558. [2021-06-05 22:31:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3558 states, 3557 states have (on average 4.184143941523756) internal successors, (14883), 3557 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:41,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 14883 transitions. [2021-06-05 22:31:41,595 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 14883 transitions. Word has length 23 [2021-06-05 22:31:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:41,595 INFO L482 AbstractCegarLoop]: Abstraction has 3558 states and 14883 transitions. [2021-06-05 22:31:41,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 14883 transitions. [2021-06-05 22:31:41,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:41,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:41,600 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:41,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:41,801 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:41,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:41,802 INFO L82 PathProgramCache]: Analyzing trace with hash -11888951, now seen corresponding path program 17 times [2021-06-05 22:31:41,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:41,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241744682] [2021-06-05 22:31:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:41,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:41,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241744682] [2021-06-05 22:31:41,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241744682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:41,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947207583] [2021-06-05 22:31:41,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:41,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:31:41,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:41,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:41,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:42,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:42,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:42,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:42,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:42,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:42,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:42,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947207583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:42,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:42,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:42,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564467019] [2021-06-05 22:31:42,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:42,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:42,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:42,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:42,117 INFO L87 Difference]: Start difference. First operand 3558 states and 14883 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:42,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:42,883 INFO L93 Difference]: Finished difference Result 4117 states and 17059 transitions. [2021-06-05 22:31:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:31:42,883 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:42,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:42,890 INFO L225 Difference]: With dead ends: 4117 [2021-06-05 22:31:42,890 INFO L226 Difference]: Without dead ends: 4094 [2021-06-05 22:31:42,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 626.5ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:31:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4094 states. [2021-06-05 22:31:42,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4094 to 3546. [2021-06-05 22:31:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 3545 states have (on average 4.18392101551481) internal successors, (14832), 3545 states have internal predecessors, (14832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 14832 transitions. [2021-06-05 22:31:42,935 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 14832 transitions. Word has length 23 [2021-06-05 22:31:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:42,935 INFO L482 AbstractCegarLoop]: Abstraction has 3546 states and 14832 transitions. [2021-06-05 22:31:42,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:42,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 14832 transitions. [2021-06-05 22:31:42,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:42,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:42,940 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:43,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 22:31:43,145 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:43,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:43,145 INFO L82 PathProgramCache]: Analyzing trace with hash -346648009, now seen corresponding path program 18 times [2021-06-05 22:31:43,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:43,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58052679] [2021-06-05 22:31:43,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:43,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:43,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58052679] [2021-06-05 22:31:43,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58052679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:43,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728561403] [2021-06-05 22:31:43,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:43,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:31:43,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:43,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:43,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:43,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:43,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:31:43,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:43,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:43,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:43,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:31:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:43,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728561403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:43,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:43,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:43,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459867318] [2021-06-05 22:31:43,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:43,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:43,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:43,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:43,456 INFO L87 Difference]: Start difference. First operand 3546 states and 14832 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:44,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:44,268 INFO L93 Difference]: Finished difference Result 4439 states and 18330 transitions. [2021-06-05 22:31:44,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:31:44,269 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:44,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:44,276 INFO L225 Difference]: With dead ends: 4439 [2021-06-05 22:31:44,276 INFO L226 Difference]: Without dead ends: 4408 [2021-06-05 22:31:44,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 598.5ms TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:31:44,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2021-06-05 22:31:44,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 3563. [2021-06-05 22:31:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3563 states, 3562 states have (on average 4.1869736103312745) internal successors, (14914), 3562 states have internal predecessors, (14914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3563 states to 3563 states and 14914 transitions. [2021-06-05 22:31:44,326 INFO L78 Accepts]: Start accepts. Automaton has 3563 states and 14914 transitions. Word has length 23 [2021-06-05 22:31:44,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:44,326 INFO L482 AbstractCegarLoop]: Abstraction has 3563 states and 14914 transitions. [2021-06-05 22:31:44,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:44,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3563 states and 14914 transitions. [2021-06-05 22:31:44,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:44,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:44,331 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:44,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 22:31:44,531 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:44,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:44,532 INFO L82 PathProgramCache]: Analyzing trace with hash 241097313, now seen corresponding path program 19 times [2021-06-05 22:31:44,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:44,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424066881] [2021-06-05 22:31:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:44,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:44,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424066881] [2021-06-05 22:31:44,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424066881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:44,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206190554] [2021-06-05 22:31:44,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:44,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:44,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:44,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:44,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:44,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:44,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:44,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:44,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:44,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206190554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:44,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:44,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:44,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001224340] [2021-06-05 22:31:44,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:44,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:44,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:44,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:44,850 INFO L87 Difference]: Start difference. First operand 3563 states and 14914 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:45,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:45,695 INFO L93 Difference]: Finished difference Result 4196 states and 17379 transitions. [2021-06-05 22:31:45,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:31:45,695 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:45,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:45,703 INFO L225 Difference]: With dead ends: 4196 [2021-06-05 22:31:45,703 INFO L226 Difference]: Without dead ends: 4168 [2021-06-05 22:31:45,703 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 717.1ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:31:45,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-06-05 22:31:45,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 3569. [2021-06-05 22:31:45,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3569 states, 3568 states have (on average 4.186659192825112) internal successors, (14938), 3568 states have internal predecessors, (14938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:45,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 14938 transitions. [2021-06-05 22:31:45,751 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 14938 transitions. Word has length 23 [2021-06-05 22:31:45,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:45,751 INFO L482 AbstractCegarLoop]: Abstraction has 3569 states and 14938 transitions. [2021-06-05 22:31:45,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:45,751 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 14938 transitions. [2021-06-05 22:31:45,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:45,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:45,756 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:45,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:45,956 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:45,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:45,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1316808469, now seen corresponding path program 20 times [2021-06-05 22:31:45,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:45,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497109333] [2021-06-05 22:31:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:46,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:46,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497109333] [2021-06-05 22:31:46,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497109333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:46,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256577965] [2021-06-05 22:31:46,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:46,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:46,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:46,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:46,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:46,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:46,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:46,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:46,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:46,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:46,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:46,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256577965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:46,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:46,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:46,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676959396] [2021-06-05 22:31:46,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:46,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:46,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:46,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:46,283 INFO L87 Difference]: Start difference. First operand 3569 states and 14938 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:46,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:46,988 INFO L93 Difference]: Finished difference Result 4238 states and 17551 transitions. [2021-06-05 22:31:46,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:31:46,989 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:46,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:46,996 INFO L225 Difference]: With dead ends: 4238 [2021-06-05 22:31:46,996 INFO L226 Difference]: Without dead ends: 4215 [2021-06-05 22:31:46,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 658.1ms TimeCoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:31:47,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4215 states. [2021-06-05 22:31:47,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4215 to 3559. [2021-06-05 22:31:47,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 3558 states have (on average 4.188026981450253) internal successors, (14901), 3558 states have internal predecessors, (14901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:47,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 14901 transitions. [2021-06-05 22:31:47,043 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 14901 transitions. Word has length 23 [2021-06-05 22:31:47,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:47,043 INFO L482 AbstractCegarLoop]: Abstraction has 3559 states and 14901 transitions. [2021-06-05 22:31:47,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:47,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 14901 transitions. [2021-06-05 22:31:47,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:47,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:47,048 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:47,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:47,248 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:47,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:47,249 INFO L82 PathProgramCache]: Analyzing trace with hash -355517803, now seen corresponding path program 21 times [2021-06-05 22:31:47,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:47,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494533336] [2021-06-05 22:31:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:47,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:47,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494533336] [2021-06-05 22:31:47,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494533336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:47,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110612954] [2021-06-05 22:31:47,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:47,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:31:47,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:47,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:47,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:47,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:47,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:31:47,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:47,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:47,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:47,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:31:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:47,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110612954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:47,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:47,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:47,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036802859] [2021-06-05 22:31:47,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:47,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:47,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:47,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:47,603 INFO L87 Difference]: Start difference. First operand 3559 states and 14901 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:48,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:48,119 INFO L93 Difference]: Finished difference Result 4037 states and 16762 transitions. [2021-06-05 22:31:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:31:48,119 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:48,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:48,126 INFO L225 Difference]: With dead ends: 4037 [2021-06-05 22:31:48,126 INFO L226 Difference]: Without dead ends: 4003 [2021-06-05 22:31:48,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 412.1ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:31:48,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2021-06-05 22:31:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 3580. [2021-06-05 22:31:48,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3580 states, 3579 states have (on average 4.186644314054205) internal successors, (14984), 3579 states have internal predecessors, (14984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:48,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 14984 transitions. [2021-06-05 22:31:48,172 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 14984 transitions. Word has length 23 [2021-06-05 22:31:48,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:48,172 INFO L482 AbstractCegarLoop]: Abstraction has 3580 states and 14984 transitions. [2021-06-05 22:31:48,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:48,173 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 14984 transitions. [2021-06-05 22:31:48,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:48,178 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:48,178 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:48,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:48,378 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:48,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:48,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1684215223, now seen corresponding path program 22 times [2021-06-05 22:31:48,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:48,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097061808] [2021-06-05 22:31:48,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:48,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:48,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097061808] [2021-06-05 22:31:48,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097061808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:48,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80212808] [2021-06-05 22:31:48,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:48,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:48,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:48,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:48,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:48,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:48,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:31:48,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:48,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:48,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:48,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:31:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:48,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80212808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:48,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:48,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:48,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115349791] [2021-06-05 22:31:48,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:48,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:48,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:48,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:48,703 INFO L87 Difference]: Start difference. First operand 3580 states and 14984 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:49,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:49,341 INFO L93 Difference]: Finished difference Result 4267 states and 17666 transitions. [2021-06-05 22:31:49,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:31:49,341 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:49,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:49,349 INFO L225 Difference]: With dead ends: 4267 [2021-06-05 22:31:49,349 INFO L226 Difference]: Without dead ends: 4236 [2021-06-05 22:31:49,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 501.0ms TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:31:49,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4236 states. [2021-06-05 22:31:49,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4236 to 3586. [2021-06-05 22:31:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3586 states, 3585 states have (on average 4.18744769874477) internal successors, (15012), 3585 states have internal predecessors, (15012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 15012 transitions. [2021-06-05 22:31:49,397 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 15012 transitions. Word has length 23 [2021-06-05 22:31:49,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:49,397 INFO L482 AbstractCegarLoop]: Abstraction has 3586 states and 15012 transitions. [2021-06-05 22:31:49,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:49,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 15012 transitions. [2021-06-05 22:31:49,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:49,402 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:49,402 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:49,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:49,603 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:49,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:49,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1096469901, now seen corresponding path program 23 times [2021-06-05 22:31:49,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:49,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477017029] [2021-06-05 22:31:49,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:49,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:49,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477017029] [2021-06-05 22:31:49,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477017029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:49,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154626397] [2021-06-05 22:31:49,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:49,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:31:49,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:49,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:31:49,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:49,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:49,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:49,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:49,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 22:31:49,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:49,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:49,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:49,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:31:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:49,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154626397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:49,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:49,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:49,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530164394] [2021-06-05 22:31:49,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:49,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:49,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:49,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:49,930 INFO L87 Difference]: Start difference. First operand 3586 states and 15012 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:50,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:50,344 INFO L93 Difference]: Finished difference Result 4118 states and 17067 transitions. [2021-06-05 22:31:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:31:50,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:50,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:50,352 INFO L225 Difference]: With dead ends: 4118 [2021-06-05 22:31:50,352 INFO L226 Difference]: Without dead ends: 4090 [2021-06-05 22:31:50,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 410.3ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:31:50,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2021-06-05 22:31:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3592. [2021-06-05 22:31:50,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3592 states, 3591 states have (on average 4.187134502923977) internal successors, (15036), 3591 states have internal predecessors, (15036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:50,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 15036 transitions. [2021-06-05 22:31:50,400 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 15036 transitions. Word has length 23 [2021-06-05 22:31:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:50,400 INFO L482 AbstractCegarLoop]: Abstraction has 3592 states and 15036 transitions. [2021-06-05 22:31:50,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 15036 transitions. [2021-06-05 22:31:50,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:50,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:50,405 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:50,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 22:31:50,605 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:50,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:50,606 INFO L82 PathProgramCache]: Analyzing trace with hash -20758745, now seen corresponding path program 24 times [2021-06-05 22:31:50,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:50,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143202336] [2021-06-05 22:31:50,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:50,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:50,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143202336] [2021-06-05 22:31:50,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143202336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:50,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211269422] [2021-06-05 22:31:50,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:50,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:31:50,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:50,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:50,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:50,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:50,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:50,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:50,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:50,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:50,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:50,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211269422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:50,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:50,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:50,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110629336] [2021-06-05 22:31:50,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:50,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:50,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:50,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:50,950 INFO L87 Difference]: Start difference. First operand 3592 states and 15036 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:51,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:51,656 INFO L93 Difference]: Finished difference Result 4150 states and 17202 transitions. [2021-06-05 22:31:51,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:31:51,656 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:51,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:51,663 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 22:31:51,663 INFO L226 Difference]: Without dead ends: 4127 [2021-06-05 22:31:51,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 682.7ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:31:51,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2021-06-05 22:31:51,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 3580. [2021-06-05 22:31:51,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3580 states, 3579 states have (on average 4.186644314054205) internal successors, (14984), 3579 states have internal predecessors, (14984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:51,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 14984 transitions. [2021-06-05 22:31:51,711 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 14984 transitions. Word has length 23 [2021-06-05 22:31:51,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:51,712 INFO L482 AbstractCegarLoop]: Abstraction has 3580 states and 14984 transitions. [2021-06-05 22:31:51,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:51,712 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 14984 transitions. [2021-06-05 22:31:51,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:51,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:51,718 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:51,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 22:31:51,933 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:51,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:51,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1454372855, now seen corresponding path program 25 times [2021-06-05 22:31:51,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:51,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117471449] [2021-06-05 22:31:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:52,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:52,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117471449] [2021-06-05 22:31:52,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117471449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:52,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390300970] [2021-06-05 22:31:52,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:52,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:52,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:52,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:52,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:31:52,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:52,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:52,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:52,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:31:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:52,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390300970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:52,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:52,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:52,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459923233] [2021-06-05 22:31:52,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:52,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:52,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:52,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:52,261 INFO L87 Difference]: Start difference. First operand 3580 states and 14984 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:52,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:52,867 INFO L93 Difference]: Finished difference Result 4354 states and 18034 transitions. [2021-06-05 22:31:52,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:31:52,867 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:52,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:52,875 INFO L225 Difference]: With dead ends: 4354 [2021-06-05 22:31:52,875 INFO L226 Difference]: Without dead ends: 4330 [2021-06-05 22:31:52,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 493.1ms TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:31:52,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4330 states. [2021-06-05 22:31:52,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4330 to 3598. [2021-06-05 22:31:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3598 states, 3597 states have (on average 4.18960244648318) internal successors, (15070), 3597 states have internal predecessors, (15070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:52,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3598 states to 3598 states and 15070 transitions. [2021-06-05 22:31:52,923 INFO L78 Accepts]: Start accepts. Automaton has 3598 states and 15070 transitions. Word has length 23 [2021-06-05 22:31:52,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:52,923 INFO L482 AbstractCegarLoop]: Abstraction has 3598 states and 15070 transitions. [2021-06-05 22:31:52,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:52,923 INFO L276 IsEmpty]: Start isEmpty. Operand 3598 states and 15070 transitions. [2021-06-05 22:31:52,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:52,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:52,928 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:53,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 22:31:53,128 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:53,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:53,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1934433481, now seen corresponding path program 26 times [2021-06-05 22:31:53,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:53,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7771664] [2021-06-05 22:31:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:53,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:53,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7771664] [2021-06-05 22:31:53,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7771664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:53,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327216937] [2021-06-05 22:31:53,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:53,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:53,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:53,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:53,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:53,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:53,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:53,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:53,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:53,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:53,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:53,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327216937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:53,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:53,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:53,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661288056] [2021-06-05 22:31:53,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:53,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:53,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:53,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:53,455 INFO L87 Difference]: Start difference. First operand 3598 states and 15070 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:54,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:54,239 INFO L93 Difference]: Finished difference Result 4209 states and 17438 transitions. [2021-06-05 22:31:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:31:54,239 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:54,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:54,246 INFO L225 Difference]: With dead ends: 4209 [2021-06-05 22:31:54,246 INFO L226 Difference]: Without dead ends: 4181 [2021-06-05 22:31:54,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 683.7ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:31:54,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-06-05 22:31:54,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 3604. [2021-06-05 22:31:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 3603 states have (on average 4.189286705523175) internal successors, (15094), 3603 states have internal predecessors, (15094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 15094 transitions. [2021-06-05 22:31:54,312 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 15094 transitions. Word has length 23 [2021-06-05 22:31:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:54,312 INFO L482 AbstractCegarLoop]: Abstraction has 3604 states and 15094 transitions. [2021-06-05 22:31:54,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:54,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 15094 transitions. [2021-06-05 22:31:54,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:54,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:54,318 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:54,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:54,519 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:54,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:54,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1284822659, now seen corresponding path program 27 times [2021-06-05 22:31:54,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:54,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707212757] [2021-06-05 22:31:54,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:54,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:54,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707212757] [2021-06-05 22:31:54,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707212757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:54,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571558044] [2021-06-05 22:31:54,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:54,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:31:54,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:54,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:54,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:54,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:54,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:54,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:54,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:54,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:54,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:54,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571558044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:54,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:54,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:54,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722788172] [2021-06-05 22:31:54,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:54,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:54,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:54,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:54,848 INFO L87 Difference]: Start difference. First operand 3604 states and 15094 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:55,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:55,463 INFO L93 Difference]: Finished difference Result 4143 states and 17189 transitions. [2021-06-05 22:31:55,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:31:55,463 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:55,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:55,471 INFO L225 Difference]: With dead ends: 4143 [2021-06-05 22:31:55,471 INFO L226 Difference]: Without dead ends: 4120 [2021-06-05 22:31:55,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 596.8ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:31:55,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4120 states. [2021-06-05 22:31:55,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4120 to 3592. [2021-06-05 22:31:55,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3592 states, 3591 states have (on average 4.189083820662768) internal successors, (15043), 3591 states have internal predecessors, (15043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:55,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 15043 transitions. [2021-06-05 22:31:55,519 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 15043 transitions. Word has length 23 [2021-06-05 22:31:55,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:55,519 INFO L482 AbstractCegarLoop]: Abstraction has 3592 states and 15043 transitions. [2021-06-05 22:31:55,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 15043 transitions. [2021-06-05 22:31:55,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:55,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:55,524 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:55,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:55,725 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:55,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:55,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1619581717, now seen corresponding path program 28 times [2021-06-05 22:31:55,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:55,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014369121] [2021-06-05 22:31:55,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:55,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:55,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014369121] [2021-06-05 22:31:55,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014369121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:55,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460013072] [2021-06-05 22:31:55,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:55,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:55,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:55,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:55,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:55,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:55,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:31:55,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:56,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:56,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:56,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:31:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:56,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460013072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:56,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:56,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:56,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447318242] [2021-06-05 22:31:56,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:56,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:56,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:56,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:56,076 INFO L87 Difference]: Start difference. First operand 3592 states and 15043 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:56,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:56,880 INFO L93 Difference]: Finished difference Result 4535 states and 18740 transitions. [2021-06-05 22:31:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:31:56,880 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:56,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:56,888 INFO L225 Difference]: With dead ends: 4535 [2021-06-05 22:31:56,888 INFO L226 Difference]: Without dead ends: 4504 [2021-06-05 22:31:56,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 668.7ms TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:31:56,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4504 states. [2021-06-05 22:31:56,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4504 to 3598. [2021-06-05 22:31:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3598 states, 3597 states have (on average 4.189880455935501) internal successors, (15071), 3597 states have internal predecessors, (15071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3598 states to 3598 states and 15071 transitions. [2021-06-05 22:31:56,940 INFO L78 Accepts]: Start accepts. Automaton has 3598 states and 15071 transitions. Word has length 23 [2021-06-05 22:31:56,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:56,940 INFO L482 AbstractCegarLoop]: Abstraction has 3598 states and 15071 transitions. [2021-06-05 22:31:56,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:56,940 INFO L276 IsEmpty]: Start isEmpty. Operand 3598 states and 15071 transitions. [2021-06-05 22:31:56,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:56,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:56,945 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:57,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-05 22:31:57,146 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:57,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:57,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1031836395, now seen corresponding path program 29 times [2021-06-05 22:31:57,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:57,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254300839] [2021-06-05 22:31:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:57,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:57,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254300839] [2021-06-05 22:31:57,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254300839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:57,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587332239] [2021-06-05 22:31:57,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:57,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:31:57,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:57,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:57,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:57,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:57,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:57,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:57,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:57,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:57,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:57,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587332239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:57,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:57,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:57,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111333767] [2021-06-05 22:31:57,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:57,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:57,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:57,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:57,473 INFO L87 Difference]: Start difference. First operand 3598 states and 15071 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:58,364 INFO L93 Difference]: Finished difference Result 4267 states and 17671 transitions. [2021-06-05 22:31:58,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:31:58,365 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:58,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:58,372 INFO L225 Difference]: With dead ends: 4267 [2021-06-05 22:31:58,372 INFO L226 Difference]: Without dead ends: 4239 [2021-06-05 22:31:58,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 767.1ms TimeCoverageRelationStatistics Valid=249, Invalid=941, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:31:58,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4239 states. [2021-06-05 22:31:58,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4239 to 3604. [2021-06-05 22:31:58,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 3603 states have (on average 4.189564252012212) internal successors, (15095), 3603 states have internal predecessors, (15095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:58,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 15095 transitions. [2021-06-05 22:31:58,422 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 15095 transitions. Word has length 23 [2021-06-05 22:31:58,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:58,422 INFO L482 AbstractCegarLoop]: Abstraction has 3604 states and 15095 transitions. [2021-06-05 22:31:58,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:58,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 15095 transitions. [2021-06-05 22:31:58,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:58,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:58,427 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:58,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 22:31:58,628 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:58,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:58,628 INFO L82 PathProgramCache]: Analyzing trace with hash 43874761, now seen corresponding path program 30 times [2021-06-05 22:31:58,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:58,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993829261] [2021-06-05 22:31:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:58,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:58,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993829261] [2021-06-05 22:31:58,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993829261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:58,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041982493] [2021-06-05 22:31:58,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:58,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:31:58,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:58,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:31:58,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:58,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:58,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:31:58,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:58,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:58,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:58,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:31:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:58,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041982493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:58,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:58,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:31:58,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986598010] [2021-06-05 22:31:58,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:31:58,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:58,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:31:58,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:31:58,959 INFO L87 Difference]: Start difference. First operand 3604 states and 15095 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:59,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:59,786 INFO L93 Difference]: Finished difference Result 4173 states and 17310 transitions. [2021-06-05 22:31:59,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:31:59,787 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:31:59,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:59,794 INFO L225 Difference]: With dead ends: 4173 [2021-06-05 22:31:59,794 INFO L226 Difference]: Without dead ends: 4150 [2021-06-05 22:31:59,795 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 669.7ms TimeCoverageRelationStatistics Valid=205, Invalid=787, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:31:59,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2021-06-05 22:31:59,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 3586. [2021-06-05 22:31:59,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3586 states, 3585 states have (on average 4.18744769874477) internal successors, (15012), 3585 states have internal predecessors, (15012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 15012 transitions. [2021-06-05 22:31:59,844 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 15012 transitions. Word has length 23 [2021-06-05 22:31:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:59,844 INFO L482 AbstractCegarLoop]: Abstraction has 3586 states and 15012 transitions. [2021-06-05 22:31:59,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 15012 transitions. [2021-06-05 22:31:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:31:59,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:59,849 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:00,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:00,051 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:00,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:00,051 INFO L82 PathProgramCache]: Analyzing trace with hash 728165811, now seen corresponding path program 31 times [2021-06-05 22:32:00,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:00,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853553432] [2021-06-05 22:32:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:00,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:00,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853553432] [2021-06-05 22:32:00,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853553432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:00,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705242088] [2021-06-05 22:32:00,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:00,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:00,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:00,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:00,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:32:00,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:00,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:00,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:00,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:32:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:00,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705242088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:00,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:00,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:00,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620354809] [2021-06-05 22:32:00,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:00,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:00,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:00,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:00,376 INFO L87 Difference]: Start difference. First operand 3586 states and 15012 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:01,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:01,003 INFO L93 Difference]: Finished difference Result 4168 states and 17295 transitions. [2021-06-05 22:32:01,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:32:01,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:01,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:01,012 INFO L225 Difference]: With dead ends: 4168 [2021-06-05 22:32:01,012 INFO L226 Difference]: Without dead ends: 4144 [2021-06-05 22:32:01,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 472.6ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:32:01,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-06-05 22:32:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 3598. [2021-06-05 22:32:01,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3598 states, 3597 states have (on average 4.18765638031693) internal successors, (15063), 3597 states have internal predecessors, (15063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3598 states to 3598 states and 15063 transitions. [2021-06-05 22:32:01,061 INFO L78 Accepts]: Start accepts. Automaton has 3598 states and 15063 transitions. Word has length 23 [2021-06-05 22:32:01,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:01,061 INFO L482 AbstractCegarLoop]: Abstraction has 3598 states and 15063 transitions. [2021-06-05 22:32:01,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:01,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3598 states and 15063 transitions. [2021-06-05 22:32:01,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:01,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:01,066 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:01,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:01,266 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:01,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:01,266 INFO L82 PathProgramCache]: Analyzing trace with hash -177995149, now seen corresponding path program 32 times [2021-06-05 22:32:01,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:01,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607506469] [2021-06-05 22:32:01,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:01,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:01,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607506469] [2021-06-05 22:32:01,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607506469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:01,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314284312] [2021-06-05 22:32:01,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:01,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:01,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:01,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:01,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:01,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:01,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:01,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:01,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:01,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:01,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:32:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:01,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314284312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:01,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:01,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:01,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852298899] [2021-06-05 22:32:01,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:01,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:01,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:01,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:01,618 INFO L87 Difference]: Start difference. First operand 3598 states and 15063 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:02,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:02,277 INFO L93 Difference]: Finished difference Result 4118 states and 17070 transitions. [2021-06-05 22:32:02,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:32:02,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:02,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:02,284 INFO L225 Difference]: With dead ends: 4118 [2021-06-05 22:32:02,284 INFO L226 Difference]: Without dead ends: 4090 [2021-06-05 22:32:02,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 664.6ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:32:02,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2021-06-05 22:32:02,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3604. [2021-06-05 22:32:02,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 3603 states have (on average 4.187343880099917) internal successors, (15087), 3603 states have internal predecessors, (15087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 15087 transitions. [2021-06-05 22:32:02,333 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 15087 transitions. Word has length 23 [2021-06-05 22:32:02,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:02,334 INFO L482 AbstractCegarLoop]: Abstraction has 3604 states and 15087 transitions. [2021-06-05 22:32:02,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 15087 transitions. [2021-06-05 22:32:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:02,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:02,338 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:02,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:02,539 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:02,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:02,539 INFO L82 PathProgramCache]: Analyzing trace with hash 897716007, now seen corresponding path program 33 times [2021-06-05 22:32:02,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:02,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698854405] [2021-06-05 22:32:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:02,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:02,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698854405] [2021-06-05 22:32:02,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698854405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:02,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093170995] [2021-06-05 22:32:02,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:02,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:32:02,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:02,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:02,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:02,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:02,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:02,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:02,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:02,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:02,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:32:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:02,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093170995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:02,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:02,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:02,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109433551] [2021-06-05 22:32:02,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:02,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:02,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:02,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:02,861 INFO L87 Difference]: Start difference. First operand 3604 states and 15087 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:03,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:03,584 INFO L93 Difference]: Finished difference Result 4016 states and 16685 transitions. [2021-06-05 22:32:03,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:32:03,584 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:03,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:03,591 INFO L225 Difference]: With dead ends: 4016 [2021-06-05 22:32:03,591 INFO L226 Difference]: Without dead ends: 3993 [2021-06-05 22:32:03,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 603.4ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:32:03,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3993 states. [2021-06-05 22:32:03,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3993 to 3592. [2021-06-05 22:32:03,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3592 states, 3591 states have (on average 4.187134502923977) internal successors, (15036), 3591 states have internal predecessors, (15036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 15036 transitions. [2021-06-05 22:32:03,659 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 15036 transitions. Word has length 23 [2021-06-05 22:32:03,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:03,659 INFO L482 AbstractCegarLoop]: Abstraction has 3592 states and 15036 transitions. [2021-06-05 22:32:03,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:03,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 15036 transitions. [2021-06-05 22:32:03,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:03,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:03,664 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:03,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:03,865 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:03,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:03,865 INFO L82 PathProgramCache]: Analyzing trace with hash -600531609, now seen corresponding path program 34 times [2021-06-05 22:32:03,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:03,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462109872] [2021-06-05 22:32:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:03,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:03,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462109872] [2021-06-05 22:32:03,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462109872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:03,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012083966] [2021-06-05 22:32:03,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:04,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:04,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:04,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:04,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:04,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:04,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:32:04,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:04,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:04,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:04,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:32:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:04,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012083966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:04,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:04,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:04,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41155312] [2021-06-05 22:32:04,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:04,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:04,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:04,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:04,185 INFO L87 Difference]: Start difference. First operand 3592 states and 15036 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:04,593 INFO L93 Difference]: Finished difference Result 4019 states and 16700 transitions. [2021-06-05 22:32:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:32:04,594 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:04,601 INFO L225 Difference]: With dead ends: 4019 [2021-06-05 22:32:04,601 INFO L226 Difference]: Without dead ends: 3994 [2021-06-05 22:32:04,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 401.3ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:32:04,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3994 states. [2021-06-05 22:32:04,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3994 to 3584. [2021-06-05 22:32:04,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 4.188110521909015) internal successors, (15006), 3583 states have internal predecessors, (15006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 15006 transitions. [2021-06-05 22:32:04,647 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 15006 transitions. Word has length 23 [2021-06-05 22:32:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:04,647 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 15006 transitions. [2021-06-05 22:32:04,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 15006 transitions. [2021-06-05 22:32:04,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:04,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:04,652 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:04,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 22:32:04,853 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:04,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:04,853 INFO L82 PathProgramCache]: Analyzing trace with hash -893511691, now seen corresponding path program 16 times [2021-06-05 22:32:04,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:04,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911703796] [2021-06-05 22:32:04,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:04,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:04,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911703796] [2021-06-05 22:32:04,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911703796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:04,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170193834] [2021-06-05 22:32:04,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:04,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:04,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:04,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:04,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:05,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:05,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:32:05,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:05,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:05,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:05,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:32:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:05,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170193834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:05,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:05,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:05,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279696423] [2021-06-05 22:32:05,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:05,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:05,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:05,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:05,175 INFO L87 Difference]: Start difference. First operand 3584 states and 15006 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:05,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:05,782 INFO L93 Difference]: Finished difference Result 3769 states and 15694 transitions. [2021-06-05 22:32:05,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:32:05,782 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:05,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:05,789 INFO L225 Difference]: With dead ends: 3769 [2021-06-05 22:32:05,789 INFO L226 Difference]: Without dead ends: 3754 [2021-06-05 22:32:05,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 472.5ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:32:05,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2021-06-05 22:32:05,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 3584. [2021-06-05 22:32:05,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 4.188110521909015) internal successors, (15006), 3583 states have internal predecessors, (15006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:05,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 15006 transitions. [2021-06-05 22:32:05,835 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 15006 transitions. Word has length 23 [2021-06-05 22:32:05,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:05,836 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 15006 transitions. [2021-06-05 22:32:05,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:05,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 15006 transitions. [2021-06-05 22:32:05,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:05,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:05,841 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:06,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 22:32:06,041 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:06,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:06,041 INFO L82 PathProgramCache]: Analyzing trace with hash -442965643, now seen corresponding path program 17 times [2021-06-05 22:32:06,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:06,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092813363] [2021-06-05 22:32:06,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:06,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:06,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092813363] [2021-06-05 22:32:06,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092813363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:06,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389650312] [2021-06-05 22:32:06,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:06,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:32:06,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:06,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:06,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:06,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:06,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:06,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:06,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:06,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:06,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:32:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:06,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389650312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:06,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:06,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:06,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492475556] [2021-06-05 22:32:06,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:06,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:06,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:06,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:06,388 INFO L87 Difference]: Start difference. First operand 3584 states and 15006 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:07,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:07,160 INFO L93 Difference]: Finished difference Result 3754 states and 15638 transitions. [2021-06-05 22:32:07,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:32:07,160 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:07,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:07,166 INFO L225 Difference]: With dead ends: 3754 [2021-06-05 22:32:07,166 INFO L226 Difference]: Without dead ends: 3732 [2021-06-05 22:32:07,167 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 718.4ms TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:32:07,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3732 states. [2021-06-05 22:32:07,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3732 to 3576. [2021-06-05 22:32:07,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3576 states, 3575 states have (on average 4.187972027972028) internal successors, (14972), 3575 states have internal predecessors, (14972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3576 states to 3576 states and 14972 transitions. [2021-06-05 22:32:07,212 INFO L78 Accepts]: Start accepts. Automaton has 3576 states and 14972 transitions. Word has length 23 [2021-06-05 22:32:07,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:07,212 INFO L482 AbstractCegarLoop]: Abstraction has 3576 states and 14972 transitions. [2021-06-05 22:32:07,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:07,212 INFO L276 IsEmpty]: Start isEmpty. Operand 3576 states and 14972 transitions. [2021-06-05 22:32:07,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:07,217 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:07,217 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:07,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:07,418 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:07,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:07,418 INFO L82 PathProgramCache]: Analyzing trace with hash -873862077, now seen corresponding path program 18 times [2021-06-05 22:32:07,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:07,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128382570] [2021-06-05 22:32:07,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:07,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:07,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128382570] [2021-06-05 22:32:07,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128382570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:07,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072623998] [2021-06-05 22:32:07,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:07,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:32:07,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:07,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 22:32:07,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:07,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:07,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:32:07,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-06-05 22:32:07,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:07,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:07,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:07,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-06-05 22:32:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:07,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072623998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:07,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:07,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:07,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989401721] [2021-06-05 22:32:07,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:07,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:07,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:07,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:07,710 INFO L87 Difference]: Start difference. First operand 3576 states and 14972 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:08,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:08,179 INFO L93 Difference]: Finished difference Result 3980 states and 16505 transitions. [2021-06-05 22:32:08,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:32:08,179 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:08,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:08,186 INFO L225 Difference]: With dead ends: 3980 [2021-06-05 22:32:08,187 INFO L226 Difference]: Without dead ends: 3945 [2021-06-05 22:32:08,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 343.8ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:32:08,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3945 states. [2021-06-05 22:32:08,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3945 to 3616. [2021-06-05 22:32:08,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3616 states, 3615 states have (on average 4.193360995850623) internal successors, (15159), 3615 states have internal predecessors, (15159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:08,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 15159 transitions. [2021-06-05 22:32:08,236 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 15159 transitions. Word has length 23 [2021-06-05 22:32:08,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:08,236 INFO L482 AbstractCegarLoop]: Abstraction has 3616 states and 15159 transitions. [2021-06-05 22:32:08,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:08,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 15159 transitions. [2021-06-05 22:32:08,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:08,264 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:08,264 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:08,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:08,464 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:08,465 INFO L82 PathProgramCache]: Analyzing trace with hash -209925775, now seen corresponding path program 19 times [2021-06-05 22:32:08,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:08,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027264391] [2021-06-05 22:32:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:08,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:08,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027264391] [2021-06-05 22:32:08,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027264391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:08,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69720553] [2021-06-05 22:32:08,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:08,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:08,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:08,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:08,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:08,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:32:08,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:08,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:08,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:08,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:32:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:08,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69720553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:08,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:08,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:08,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674810668] [2021-06-05 22:32:08,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:08,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:08,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:08,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:08,789 INFO L87 Difference]: Start difference. First operand 3616 states and 15159 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:09,361 INFO L93 Difference]: Finished difference Result 3838 states and 15999 transitions. [2021-06-05 22:32:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:32:09,362 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:09,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:09,369 INFO L225 Difference]: With dead ends: 3838 [2021-06-05 22:32:09,369 INFO L226 Difference]: Without dead ends: 3823 [2021-06-05 22:32:09,369 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 495.5ms TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:32:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3823 states. [2021-06-05 22:32:09,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3823 to 3620. [2021-06-05 22:32:09,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 4.193699917104173) internal successors, (15177), 3619 states have internal predecessors, (15177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 15177 transitions. [2021-06-05 22:32:09,416 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 15177 transitions. Word has length 23 [2021-06-05 22:32:09,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:09,416 INFO L482 AbstractCegarLoop]: Abstraction has 3620 states and 15177 transitions. [2021-06-05 22:32:09,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:09,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 15177 transitions. [2021-06-05 22:32:09,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:09,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:09,421 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:09,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:09,622 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:09,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:09,622 INFO L82 PathProgramCache]: Analyzing trace with hash -631860043, now seen corresponding path program 20 times [2021-06-05 22:32:09,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:09,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721067084] [2021-06-05 22:32:09,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:09,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:09,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721067084] [2021-06-05 22:32:09,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721067084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:09,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868124752] [2021-06-05 22:32:09,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:09,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:09,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:09,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:32:09,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:09,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:09,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 50 [2021-06-05 22:32:09,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:09,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:09,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:32:09,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:10 [2021-06-05 22:32:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:09,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868124752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:09,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:09,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:32:09,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625748785] [2021-06-05 22:32:09,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:32:09,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:09,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:32:09,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:32:09,917 INFO L87 Difference]: Start difference. First operand 3620 states and 15177 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:10,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:10,415 INFO L93 Difference]: Finished difference Result 3859 states and 16075 transitions. [2021-06-05 22:32:10,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:32:10,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:10,422 INFO L225 Difference]: With dead ends: 3859 [2021-06-05 22:32:10,422 INFO L226 Difference]: Without dead ends: 3844 [2021-06-05 22:32:10,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 354.9ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:32:10,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2021-06-05 22:32:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3628. [2021-06-05 22:32:10,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 4.193824097049903) internal successors, (15211), 3627 states have internal predecessors, (15211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:10,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 15211 transitions. [2021-06-05 22:32:10,468 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 15211 transitions. Word has length 23 [2021-06-05 22:32:10,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:10,468 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 15211 transitions. [2021-06-05 22:32:10,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:10,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 15211 transitions. [2021-06-05 22:32:10,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:10,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:10,473 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:10,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:10,673 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:10,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:10,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1538021003, now seen corresponding path program 21 times [2021-06-05 22:32:10,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:10,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853458518] [2021-06-05 22:32:10,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:10,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:10,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853458518] [2021-06-05 22:32:10,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853458518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:10,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426688626] [2021-06-05 22:32:10,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:10,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:32:10,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:10,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:32:10,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:10,931 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 22:32:10,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 54 [2021-06-05 22:32:10,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:10,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:10,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:10,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:47 [2021-06-05 22:32:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:11,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426688626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:11,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:11,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:32:11,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623203622] [2021-06-05 22:32:11,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:32:11,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:11,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:32:11,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:32:11,004 INFO L87 Difference]: Start difference. First operand 3628 states and 15211 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:11,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:11,584 INFO L93 Difference]: Finished difference Result 4007 states and 16672 transitions. [2021-06-05 22:32:11,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:32:11,585 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:11,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:11,591 INFO L225 Difference]: With dead ends: 4007 [2021-06-05 22:32:11,591 INFO L226 Difference]: Without dead ends: 3986 [2021-06-05 22:32:11,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 469.2ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:32:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2021-06-05 22:32:11,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3632. [2021-06-05 22:32:11,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3632 states, 3631 states have (on average 4.193610575599009) internal successors, (15227), 3631 states have internal predecessors, (15227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:11,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 15227 transitions. [2021-06-05 22:32:11,638 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 15227 transitions. Word has length 23 [2021-06-05 22:32:11,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:11,638 INFO L482 AbstractCegarLoop]: Abstraction has 3632 states and 15227 transitions. [2021-06-05 22:32:11,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:11,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 15227 transitions. [2021-06-05 22:32:11,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:11,643 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:11,643 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:11,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 22:32:11,843 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:11,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:11,843 INFO L82 PathProgramCache]: Analyzing trace with hash -462309847, now seen corresponding path program 22 times [2021-06-05 22:32:11,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:11,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248708677] [2021-06-05 22:32:11,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:11,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:11,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248708677] [2021-06-05 22:32:11,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248708677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:11,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214980414] [2021-06-05 22:32:11,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:11,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:11,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:11,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:11,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:12,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:12,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:12,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:12,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:12,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:12,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:32:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:12,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214980414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:12,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:12,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:12,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063708847] [2021-06-05 22:32:12,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:12,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:12,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:12,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:12,160 INFO L87 Difference]: Start difference. First operand 3632 states and 15227 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:12,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:12,863 INFO L93 Difference]: Finished difference Result 3856 states and 16061 transitions. [2021-06-05 22:32:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:32:12,863 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:12,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:12,870 INFO L225 Difference]: With dead ends: 3856 [2021-06-05 22:32:12,870 INFO L226 Difference]: Without dead ends: 3841 [2021-06-05 22:32:12,870 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 638.6ms TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:32:12,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2021-06-05 22:32:12,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 3624. [2021-06-05 22:32:12,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 3623 states have (on average 4.193486061275187) internal successors, (15193), 3623 states have internal predecessors, (15193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:12,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 15193 transitions. [2021-06-05 22:32:12,915 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 15193 transitions. Word has length 23 [2021-06-05 22:32:12,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:12,915 INFO L482 AbstractCegarLoop]: Abstraction has 3624 states and 15193 transitions. [2021-06-05 22:32:12,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:12,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 15193 transitions. [2021-06-05 22:32:12,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:12,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:12,920 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:13,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-05 22:32:13,121 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:13,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:13,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1960557463, now seen corresponding path program 23 times [2021-06-05 22:32:13,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:13,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609115973] [2021-06-05 22:32:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:13,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:13,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609115973] [2021-06-05 22:32:13,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609115973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:13,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196867992] [2021-06-05 22:32:13,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:13,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:32:13,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:13,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:32:13,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:13,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:13,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:32:13,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:13,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:13,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:13,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:32:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:13,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196867992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:13,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:13,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:13,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038467748] [2021-06-05 22:32:13,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:13,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:13,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:13,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:13,456 INFO L87 Difference]: Start difference. First operand 3624 states and 15193 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:13,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:13,996 INFO L93 Difference]: Finished difference Result 3829 states and 15963 transitions. [2021-06-05 22:32:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:32:13,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:14,003 INFO L225 Difference]: With dead ends: 3829 [2021-06-05 22:32:14,003 INFO L226 Difference]: Without dead ends: 3814 [2021-06-05 22:32:14,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 457.8ms TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:32:14,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3814 states. [2021-06-05 22:32:14,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3814 to 3616. [2021-06-05 22:32:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3616 states, 3615 states have (on average 4.193360995850623) internal successors, (15159), 3615 states have internal predecessors, (15159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:14,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 15159 transitions. [2021-06-05 22:32:14,058 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 15159 transitions. Word has length 23 [2021-06-05 22:32:14,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:14,058 INFO L482 AbstractCegarLoop]: Abstraction has 3616 states and 15159 transitions. [2021-06-05 22:32:14,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:14,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 15159 transitions. [2021-06-05 22:32:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:14,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:14,064 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:14,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:14,264 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:14,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:14,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1788483957, now seen corresponding path program 24 times [2021-06-05 22:32:14,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:14,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34000552] [2021-06-05 22:32:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:14,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:14,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34000552] [2021-06-05 22:32:14,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34000552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:14,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891709705] [2021-06-05 22:32:14,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:14,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:32:14,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:14,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:14,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:14,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:14,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:32:14,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:14,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:14,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:14,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:32:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:14,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891709705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:14,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:14,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:14,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730848767] [2021-06-05 22:32:14,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:14,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:14,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:14,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:14,585 INFO L87 Difference]: Start difference. First operand 3616 states and 15159 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:15,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:15,197 INFO L93 Difference]: Finished difference Result 3864 states and 16107 transitions. [2021-06-05 22:32:15,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:32:15,197 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:15,204 INFO L225 Difference]: With dead ends: 3864 [2021-06-05 22:32:15,204 INFO L226 Difference]: Without dead ends: 3849 [2021-06-05 22:32:15,204 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 486.0ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:32:15,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2021-06-05 22:32:15,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 3624. [2021-06-05 22:32:15,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 3623 states have (on average 4.193762075627933) internal successors, (15194), 3623 states have internal predecessors, (15194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:15,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 15194 transitions. [2021-06-05 22:32:15,250 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 15194 transitions. Word has length 23 [2021-06-05 22:32:15,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:15,250 INFO L482 AbstractCegarLoop]: Abstraction has 3624 states and 15194 transitions. [2021-06-05 22:32:15,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:15,250 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 15194 transitions. [2021-06-05 22:32:15,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:15,255 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:15,255 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:15,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:15,457 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:15,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1921149387, now seen corresponding path program 25 times [2021-06-05 22:32:15,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:15,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996333316] [2021-06-05 22:32:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:15,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:15,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996333316] [2021-06-05 22:32:15,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996333316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:15,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546426890] [2021-06-05 22:32:15,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:15,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:15,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:15,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:15,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:15,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:15,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:15,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:15,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:15,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:32:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:15,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546426890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:15,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:15,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:15,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332514284] [2021-06-05 22:32:15,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:15,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:15,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:15,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:15,805 INFO L87 Difference]: Start difference. First operand 3624 states and 15194 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:16,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:16,509 INFO L93 Difference]: Finished difference Result 3826 states and 15955 transitions. [2021-06-05 22:32:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:32:16,510 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:16,517 INFO L225 Difference]: With dead ends: 3826 [2021-06-05 22:32:16,517 INFO L226 Difference]: Without dead ends: 3804 [2021-06-05 22:32:16,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 692.7ms TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:32:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3804 states. [2021-06-05 22:32:16,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3804 to 3628. [2021-06-05 22:32:16,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 4.193548387096774) internal successors, (15210), 3627 states have internal predecessors, (15210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:16,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 15210 transitions. [2021-06-05 22:32:16,563 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 15210 transitions. Word has length 23 [2021-06-05 22:32:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:16,563 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 15210 transitions. [2021-06-05 22:32:16,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:16,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 15210 transitions. [2021-06-05 22:32:16,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:16,568 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:16,568 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:16,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-05 22:32:16,769 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:16,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:16,769 INFO L82 PathProgramCache]: Analyzing trace with hash -307582653, now seen corresponding path program 26 times [2021-06-05 22:32:16,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:16,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258363347] [2021-06-05 22:32:16,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:16,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:16,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258363347] [2021-06-05 22:32:16,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258363347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:16,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811576652] [2021-06-05 22:32:16,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:16,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:16,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:16,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:16,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:16,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:16,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:16,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:17,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:17,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:17,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:32:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:17,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811576652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:17,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:17,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:17,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098283394] [2021-06-05 22:32:17,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:17,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:17,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:17,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:17,096 INFO L87 Difference]: Start difference. First operand 3628 states and 15210 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:17,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:17,808 INFO L93 Difference]: Finished difference Result 3804 states and 15876 transitions. [2021-06-05 22:32:17,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:32:17,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:17,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:17,816 INFO L225 Difference]: With dead ends: 3804 [2021-06-05 22:32:17,816 INFO L226 Difference]: Without dead ends: 3789 [2021-06-05 22:32:17,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 661.7ms TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:32:17,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3789 states. [2021-06-05 22:32:17,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3789 to 3620. [2021-06-05 22:32:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 4.193423597678917) internal successors, (15176), 3619 states have internal predecessors, (15176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:17,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 15176 transitions. [2021-06-05 22:32:17,864 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 15176 transitions. Word has length 23 [2021-06-05 22:32:17,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:17,864 INFO L482 AbstractCegarLoop]: Abstraction has 3620 states and 15176 transitions. [2021-06-05 22:32:17,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:17,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 15176 transitions. [2021-06-05 22:32:17,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:17,870 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:17,870 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:18,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:18,070 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:18,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:18,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1561262577, now seen corresponding path program 27 times [2021-06-05 22:32:18,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:18,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908810266] [2021-06-05 22:32:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:18,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:18,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908810266] [2021-06-05 22:32:18,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908810266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:18,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85362128] [2021-06-05 22:32:18,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:18,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:32:18,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:18,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:18,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:18,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:18,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:32:18,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:18,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:18,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:18,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:32:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:18,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85362128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:18,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:18,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:18,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190742694] [2021-06-05 22:32:18,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:18,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:18,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:18,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:18,393 INFO L87 Difference]: Start difference. First operand 3620 states and 15176 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:19,010 INFO L93 Difference]: Finished difference Result 3875 states and 16145 transitions. [2021-06-05 22:32:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:32:19,011 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:19,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:19,018 INFO L225 Difference]: With dead ends: 3875 [2021-06-05 22:32:19,018 INFO L226 Difference]: Without dead ends: 3860 [2021-06-05 22:32:19,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 462.8ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:32:19,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2021-06-05 22:32:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 3624. [2021-06-05 22:32:19,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 3623 states have (on average 4.193762075627933) internal successors, (15194), 3623 states have internal predecessors, (15194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:19,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 15194 transitions. [2021-06-05 22:32:19,067 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 15194 transitions. Word has length 23 [2021-06-05 22:32:19,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:19,067 INFO L482 AbstractCegarLoop]: Abstraction has 3624 states and 15194 transitions. [2021-06-05 22:32:19,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:19,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 15194 transitions. [2021-06-05 22:32:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:19,072 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:19,072 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:19,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:19,273 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:19,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:19,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2074789429, now seen corresponding path program 28 times [2021-06-05 22:32:19,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:19,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452964569] [2021-06-05 22:32:19,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:19,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:19,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452964569] [2021-06-05 22:32:19,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452964569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:19,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771762187] [2021-06-05 22:32:19,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:19,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:19,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:19,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:19,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:19,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:19,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:19,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:19,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:19,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:19,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:32:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:19,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771762187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:19,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:19,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:19,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915548551] [2021-06-05 22:32:19,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:19,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:19,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:19,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:19,593 INFO L87 Difference]: Start difference. First operand 3624 states and 15194 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:20,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:20,264 INFO L93 Difference]: Finished difference Result 3827 states and 15958 transitions. [2021-06-05 22:32:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:32:20,265 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:20,271 INFO L225 Difference]: With dead ends: 3827 [2021-06-05 22:32:20,271 INFO L226 Difference]: Without dead ends: 3806 [2021-06-05 22:32:20,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 597.0ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:32:20,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-06-05 22:32:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3628. [2021-06-05 22:32:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 4.193548387096774) internal successors, (15210), 3627 states have internal predecessors, (15210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 15210 transitions. [2021-06-05 22:32:20,317 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 15210 transitions. Word has length 23 [2021-06-05 22:32:20,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:20,317 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 15210 transitions. [2021-06-05 22:32:20,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:20,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 15210 transitions. [2021-06-05 22:32:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:20,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:20,322 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:20,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:20,523 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:20,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:20,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1144466711, now seen corresponding path program 29 times [2021-06-05 22:32:20,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:20,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531538491] [2021-06-05 22:32:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:20,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:20,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531538491] [2021-06-05 22:32:20,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531538491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:20,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347217593] [2021-06-05 22:32:20,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:20,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:32:20,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:20,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:20,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:20,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:20,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:20,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:20,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:20,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:20,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:32:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:20,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347217593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:20,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:20,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:20,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465050988] [2021-06-05 22:32:20,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:20,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:20,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:20,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:20,848 INFO L87 Difference]: Start difference. First operand 3628 states and 15210 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:21,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:21,376 INFO L93 Difference]: Finished difference Result 3813 states and 15904 transitions. [2021-06-05 22:32:21,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:32:21,376 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:21,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:21,383 INFO L225 Difference]: With dead ends: 3813 [2021-06-05 22:32:21,383 INFO L226 Difference]: Without dead ends: 3798 [2021-06-05 22:32:21,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 514.8ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:32:21,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2021-06-05 22:32:21,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 3620. [2021-06-05 22:32:21,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 4.193423597678917) internal successors, (15176), 3619 states have internal predecessors, (15176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:21,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 15176 transitions. [2021-06-05 22:32:21,429 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 15176 transitions. Word has length 23 [2021-06-05 22:32:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:21,429 INFO L482 AbstractCegarLoop]: Abstraction has 3620 states and 15176 transitions. [2021-06-05 22:32:21,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 15176 transitions. [2021-06-05 22:32:21,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:21,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:21,434 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:21,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:21,634 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:21,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:21,635 INFO L82 PathProgramCache]: Analyzing trace with hash -863470859, now seen corresponding path program 30 times [2021-06-05 22:32:21,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:21,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918083470] [2021-06-05 22:32:21,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:21,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:21,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918083470] [2021-06-05 22:32:21,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918083470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:21,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387549775] [2021-06-05 22:32:21,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:21,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:32:21,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:21,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:21,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:21,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:21,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:21,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:21,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:21,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:21,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:32:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:21,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387549775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:21,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:21,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:21,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989188998] [2021-06-05 22:32:21,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:21,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:21,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:21,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:21,984 INFO L87 Difference]: Start difference. First operand 3620 states and 15176 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:22,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:22,523 INFO L93 Difference]: Finished difference Result 3838 states and 16010 transitions. [2021-06-05 22:32:22,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:32:22,524 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:22,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:22,530 INFO L225 Difference]: With dead ends: 3838 [2021-06-05 22:32:22,530 INFO L226 Difference]: Without dead ends: 3816 [2021-06-05 22:32:22,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 545.0ms TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:32:22,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-06-05 22:32:22,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 3629. [2021-06-05 22:32:22,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 3628 states have (on average 4.191841234840132) internal successors, (15208), 3628 states have internal predecessors, (15208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:22,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 15208 transitions. [2021-06-05 22:32:22,577 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 15208 transitions. Word has length 23 [2021-06-05 22:32:22,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:22,577 INFO L482 AbstractCegarLoop]: Abstraction has 3629 states and 15208 transitions. [2021-06-05 22:32:22,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:22,577 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 15208 transitions. [2021-06-05 22:32:22,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:22,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:22,582 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:22,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 22:32:22,783 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:22,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:22,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1905046927, now seen corresponding path program 31 times [2021-06-05 22:32:22,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:22,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452376968] [2021-06-05 22:32:22,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:22,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:22,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452376968] [2021-06-05 22:32:22,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452376968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:22,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510641167] [2021-06-05 22:32:22,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 22:32:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:22,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:22,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:23,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:23,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:23,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:23,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:23,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:23,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:32:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:23,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510641167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:23,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:23,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:23,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078104178] [2021-06-05 22:32:23,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:23,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:23,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:23,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:23,152 INFO L87 Difference]: Start difference. First operand 3629 states and 15208 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:23,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:23,741 INFO L93 Difference]: Finished difference Result 3845 states and 16033 transitions. [2021-06-05 22:32:23,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:32:23,742 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:23,748 INFO L225 Difference]: With dead ends: 3845 [2021-06-05 22:32:23,748 INFO L226 Difference]: Without dead ends: 3821 [2021-06-05 22:32:23,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 573.6ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:32:23,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3821 states. [2021-06-05 22:32:23,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3821 to 3626. [2021-06-05 22:32:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.1931034482758625) internal successors, (15200), 3625 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:23,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15200 transitions. [2021-06-05 22:32:23,794 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15200 transitions. Word has length 23 [2021-06-05 22:32:23,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:23,794 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 15200 transitions. [2021-06-05 22:32:23,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:23,794 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15200 transitions. [2021-06-05 22:32:23,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:23,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:23,799 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:23,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 22:32:23,999 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:24,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:24,000 INFO L82 PathProgramCache]: Analyzing trace with hash 2102799017, now seen corresponding path program 32 times [2021-06-05 22:32:24,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:24,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284382990] [2021-06-05 22:32:24,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:24,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:24,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284382990] [2021-06-05 22:32:24,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284382990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:24,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001613646] [2021-06-05 22:32:24,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:24,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:24,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:24,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:24,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:24,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:24,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:24,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:24,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:24,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:24,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:32:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:24,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001613646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:24,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:24,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:24,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759258317] [2021-06-05 22:32:24,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:24,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:24,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:24,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:24,385 INFO L87 Difference]: Start difference. First operand 3626 states and 15200 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:25,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:25,026 INFO L93 Difference]: Finished difference Result 3802 states and 15861 transitions. [2021-06-05 22:32:25,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:32:25,026 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:25,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:25,032 INFO L225 Difference]: With dead ends: 3802 [2021-06-05 22:32:25,033 INFO L226 Difference]: Without dead ends: 3780 [2021-06-05 22:32:25,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 683.0ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:32:25,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2021-06-05 22:32:25,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 3630. [2021-06-05 22:32:25,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3629 states have (on average 4.192890603472031) internal successors, (15216), 3629 states have internal predecessors, (15216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:25,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 15216 transitions. [2021-06-05 22:32:25,078 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 15216 transitions. Word has length 23 [2021-06-05 22:32:25,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:25,078 INFO L482 AbstractCegarLoop]: Abstraction has 3630 states and 15216 transitions. [2021-06-05 22:32:25,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:25,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 15216 transitions. [2021-06-05 22:32:25,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:25,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:25,083 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:25,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 22:32:25,284 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:25,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:25,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1609581631, now seen corresponding path program 33 times [2021-06-05 22:32:25,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:25,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274756241] [2021-06-05 22:32:25,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:25,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:25,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274756241] [2021-06-05 22:32:25,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274756241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:25,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230256038] [2021-06-05 22:32:25,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:25,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:32:25,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:25,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:25,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:25,536 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:32:25,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 22:32:25,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:25,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:25,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:25,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:41 [2021-06-05 22:32:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:25,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230256038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:25,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:25,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:32:25,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682776928] [2021-06-05 22:32:25,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:32:25,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:25,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:32:25,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:32:25,674 INFO L87 Difference]: Start difference. First operand 3630 states and 15216 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:26,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:26,489 INFO L93 Difference]: Finished difference Result 3922 states and 16351 transitions. [2021-06-05 22:32:26,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:32:26,489 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:26,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:26,496 INFO L225 Difference]: With dead ends: 3922 [2021-06-05 22:32:26,496 INFO L226 Difference]: Without dead ends: 3907 [2021-06-05 22:32:26,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 756.9ms TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:32:26,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-06-05 22:32:26,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3626. [2021-06-05 22:32:26,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.1931034482758625) internal successors, (15200), 3625 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:26,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15200 transitions. [2021-06-05 22:32:26,544 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15200 transitions. Word has length 23 [2021-06-05 22:32:26,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:26,545 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 15200 transitions. [2021-06-05 22:32:26,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:26,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15200 transitions. [2021-06-05 22:32:26,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:26,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:26,550 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:26,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:26,757 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:26,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:26,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1750609409, now seen corresponding path program 34 times [2021-06-05 22:32:26,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:26,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475895517] [2021-06-05 22:32:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:26,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:26,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475895517] [2021-06-05 22:32:26,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475895517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:26,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875440167] [2021-06-05 22:32:26,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:26,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:26,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:26,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:26,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:26,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:26,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:26,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:26,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:26,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:26,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:32:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:27,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875440167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:27,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:27,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:27,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036907966] [2021-06-05 22:32:27,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:27,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:27,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:27,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:27,091 INFO L87 Difference]: Start difference. First operand 3626 states and 15200 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:27,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:27,719 INFO L93 Difference]: Finished difference Result 3788 states and 15802 transitions. [2021-06-05 22:32:27,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:32:27,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:27,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:27,726 INFO L225 Difference]: With dead ends: 3788 [2021-06-05 22:32:27,726 INFO L226 Difference]: Without dead ends: 3767 [2021-06-05 22:32:27,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 591.6ms TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:32:27,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2021-06-05 22:32:27,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3630. [2021-06-05 22:32:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3629 states have (on average 4.192890603472031) internal successors, (15216), 3629 states have internal predecessors, (15216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:27,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 15216 transitions. [2021-06-05 22:32:27,771 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 15216 transitions. Word has length 23 [2021-06-05 22:32:27,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:27,771 INFO L482 AbstractCegarLoop]: Abstraction has 3630 states and 15216 transitions. [2021-06-05 22:32:27,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:27,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 15216 transitions. [2021-06-05 22:32:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:27,776 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:27,776 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:27,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:27,986 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:27,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:27,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1531665355, now seen corresponding path program 35 times [2021-06-05 22:32:27,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:27,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478247328] [2021-06-05 22:32:27,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:28,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:28,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478247328] [2021-06-05 22:32:28,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478247328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:28,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467235645] [2021-06-05 22:32:28,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:28,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:32:28,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:28,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:28,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:28,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:28,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:28,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:28,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:28,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:28,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:32:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:28,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467235645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:28,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:28,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:28,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799578859] [2021-06-05 22:32:28,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:28,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:28,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:28,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:28,321 INFO L87 Difference]: Start difference. First operand 3630 states and 15216 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:28,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:28,821 INFO L93 Difference]: Finished difference Result 3777 states and 15760 transitions. [2021-06-05 22:32:28,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:32:28,821 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:28,828 INFO L225 Difference]: With dead ends: 3777 [2021-06-05 22:32:28,828 INFO L226 Difference]: Without dead ends: 3762 [2021-06-05 22:32:28,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 494.4ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:32:28,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2021-06-05 22:32:28,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 3626. [2021-06-05 22:32:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.1931034482758625) internal successors, (15200), 3625 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15200 transitions. [2021-06-05 22:32:28,873 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15200 transitions. Word has length 23 [2021-06-05 22:32:28,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:28,873 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 15200 transitions. [2021-06-05 22:32:28,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:28,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15200 transitions. [2021-06-05 22:32:28,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:28,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:28,878 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:29,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-05 22:32:29,079 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:29,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:29,079 INFO L82 PathProgramCache]: Analyzing trace with hash 515550249, now seen corresponding path program 36 times [2021-06-05 22:32:29,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:29,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959518947] [2021-06-05 22:32:29,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:29,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:29,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959518947] [2021-06-05 22:32:29,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959518947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:29,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196621074] [2021-06-05 22:32:29,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:29,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:32:29,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:29,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:29,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:29,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:29,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:32:29,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:29,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:29,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:29,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:32:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:29,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196621074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:29,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:29,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:29,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887344854] [2021-06-05 22:32:29,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:29,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:29,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:29,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:29,390 INFO L87 Difference]: Start difference. First operand 3626 states and 15200 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:29,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:29,927 INFO L93 Difference]: Finished difference Result 3851 states and 16056 transitions. [2021-06-05 22:32:29,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:32:29,927 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:29,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:29,933 INFO L225 Difference]: With dead ends: 3851 [2021-06-05 22:32:29,934 INFO L226 Difference]: Without dead ends: 3836 [2021-06-05 22:32:29,934 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:32:29,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3836 states. [2021-06-05 22:32:29,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3836 to 3634. [2021-06-05 22:32:29,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3633 states have (on average 4.193228736581338) internal successors, (15234), 3633 states have internal predecessors, (15234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 15234 transitions. [2021-06-05 22:32:29,980 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 15234 transitions. Word has length 23 [2021-06-05 22:32:29,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:29,980 INFO L482 AbstractCegarLoop]: Abstraction has 3634 states and 15234 transitions. [2021-06-05 22:32:29,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:29,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 15234 transitions. [2021-06-05 22:32:29,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:29,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:29,985 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:30,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 22:32:30,185 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:30,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:30,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1100884201, now seen corresponding path program 37 times [2021-06-05 22:32:30,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:30,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096431547] [2021-06-05 22:32:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:30,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:30,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096431547] [2021-06-05 22:32:30,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096431547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:30,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089381085] [2021-06-05 22:32:30,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:30,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:30,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:30,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:30,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:30,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:30,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:30,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:30,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:32:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:30,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089381085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:30,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:30,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:30,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749262501] [2021-06-05 22:32:30,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:30,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:30,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:30,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:30,510 INFO L87 Difference]: Start difference. First operand 3634 states and 15234 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:31,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:31,253 INFO L93 Difference]: Finished difference Result 3824 states and 15947 transitions. [2021-06-05 22:32:31,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:32:31,253 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:31,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:31,260 INFO L225 Difference]: With dead ends: 3824 [2021-06-05 22:32:31,260 INFO L226 Difference]: Without dead ends: 3802 [2021-06-05 22:32:31,260 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 711.2ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:32:31,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3802 states. [2021-06-05 22:32:31,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3802 to 3638. [2021-06-05 22:32:31,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193016222161122) internal successors, (15250), 3637 states have internal predecessors, (15250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:31,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15250 transitions. [2021-06-05 22:32:31,306 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15250 transitions. Word has length 23 [2021-06-05 22:32:31,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:31,307 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15250 transitions. [2021-06-05 22:32:31,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:31,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15250 transitions. [2021-06-05 22:32:31,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:31,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:31,311 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:31,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-05 22:32:31,512 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:31,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:31,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1580516361, now seen corresponding path program 38 times [2021-06-05 22:32:31,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:31,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058873898] [2021-06-05 22:32:31,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:31,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:31,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058873898] [2021-06-05 22:32:31,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058873898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:31,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87440173] [2021-06-05 22:32:31,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:31,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:31,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:31,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:31,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:31,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:31,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:31,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:31,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:31,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:31,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:32:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:31,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87440173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:31,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:31,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:31,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084715811] [2021-06-05 22:32:31,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:31,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:31,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:31,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:31,862 INFO L87 Difference]: Start difference. First operand 3638 states and 15250 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:32,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:32,543 INFO L93 Difference]: Finished difference Result 3789 states and 15816 transitions. [2021-06-05 22:32:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:32:32,543 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:32,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:32,550 INFO L225 Difference]: With dead ends: 3789 [2021-06-05 22:32:32,550 INFO L226 Difference]: Without dead ends: 3774 [2021-06-05 22:32:32,550 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 667.0ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:32:32,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3774 states. [2021-06-05 22:32:32,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3774 to 3630. [2021-06-05 22:32:32,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3629 states have (on average 4.192890603472031) internal successors, (15216), 3629 states have internal predecessors, (15216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:32,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 15216 transitions. [2021-06-05 22:32:32,597 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 15216 transitions. Word has length 23 [2021-06-05 22:32:32,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:32,597 INFO L482 AbstractCegarLoop]: Abstraction has 3630 states and 15216 transitions. [2021-06-05 22:32:32,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:32,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 15216 transitions. [2021-06-05 22:32:32,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:32,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:32,602 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:32,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-05 22:32:32,802 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:32,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:32,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1019955137, now seen corresponding path program 39 times [2021-06-05 22:32:32,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:32,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573568886] [2021-06-05 22:32:32,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:32,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:32,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573568886] [2021-06-05 22:32:32,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573568886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:32,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312461123] [2021-06-05 22:32:32,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:32,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:32:32,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:32,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:32,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:33,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:33,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:32:33,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:33,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:33,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:33,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:32:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:33,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312461123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:33,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:33,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:33,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14382482] [2021-06-05 22:32:33,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:33,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:33,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:33,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:33,124 INFO L87 Difference]: Start difference. First operand 3630 states and 15216 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:33,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:33,643 INFO L93 Difference]: Finished difference Result 3822 states and 15936 transitions. [2021-06-05 22:32:33,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:32:33,644 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:33,650 INFO L225 Difference]: With dead ends: 3822 [2021-06-05 22:32:33,650 INFO L226 Difference]: Without dead ends: 3807 [2021-06-05 22:32:33,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 434.9ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:32:33,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-06-05 22:32:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 3626. [2021-06-05 22:32:33,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.1931034482758625) internal successors, (15200), 3625 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:33,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15200 transitions. [2021-06-05 22:32:33,695 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15200 transitions. Word has length 23 [2021-06-05 22:32:33,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:33,695 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 15200 transitions. [2021-06-05 22:32:33,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:33,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15200 transitions. [2021-06-05 22:32:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:33,700 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:33,700 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:33,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2021-06-05 22:32:33,916 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:33,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:33,916 INFO L82 PathProgramCache]: Analyzing trace with hash -348137985, now seen corresponding path program 40 times [2021-06-05 22:32:33,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:33,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770729766] [2021-06-05 22:32:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:34,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:34,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770729766] [2021-06-05 22:32:34,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770729766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:34,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454810426] [2021-06-05 22:32:34,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:34,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:34,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:34,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:34,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:34,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:34,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:32:34,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:34,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:34,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:34,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:32:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:34,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454810426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:34,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:34,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:34,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672632490] [2021-06-05 22:32:34,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:34,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:34,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:34,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:34,261 INFO L87 Difference]: Start difference. First operand 3626 states and 15200 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:34,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:34,866 INFO L93 Difference]: Finished difference Result 3863 states and 16096 transitions. [2021-06-05 22:32:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:32:34,866 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:34,873 INFO L225 Difference]: With dead ends: 3863 [2021-06-05 22:32:34,873 INFO L226 Difference]: Without dead ends: 3848 [2021-06-05 22:32:34,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 477.1ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:32:34,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3848 states. [2021-06-05 22:32:34,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3848 to 3634. [2021-06-05 22:32:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3633 states have (on average 4.193228736581338) internal successors, (15234), 3633 states have internal predecessors, (15234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:34,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 15234 transitions. [2021-06-05 22:32:34,919 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 15234 transitions. Word has length 23 [2021-06-05 22:32:34,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:34,919 INFO L482 AbstractCegarLoop]: Abstraction has 3634 states and 15234 transitions. [2021-06-05 22:32:34,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:34,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 15234 transitions. [2021-06-05 22:32:34,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:34,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:34,924 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:35,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-05 22:32:35,125 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:35,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:35,125 INFO L82 PathProgramCache]: Analyzing trace with hash 165388867, now seen corresponding path program 41 times [2021-06-05 22:32:35,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:35,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320879287] [2021-06-05 22:32:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:35,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:35,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320879287] [2021-06-05 22:32:35,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320879287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:35,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887401212] [2021-06-05 22:32:35,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:35,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:32:35,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:35,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:35,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:35,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:35,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:35,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:35,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:35,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:35,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:32:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:35,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887401212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:35,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:35,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:35,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656144894] [2021-06-05 22:32:35,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:35,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:35,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:35,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:35,445 INFO L87 Difference]: Start difference. First operand 3634 states and 15234 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:36,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:36,189 INFO L93 Difference]: Finished difference Result 3822 states and 15936 transitions. [2021-06-05 22:32:36,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:32:36,189 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:36,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:36,196 INFO L225 Difference]: With dead ends: 3822 [2021-06-05 22:32:36,196 INFO L226 Difference]: Without dead ends: 3801 [2021-06-05 22:32:36,196 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 574.0ms TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:32:36,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2021-06-05 22:32:36,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3638. [2021-06-05 22:32:36,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193016222161122) internal successors, (15250), 3637 states have internal predecessors, (15250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15250 transitions. [2021-06-05 22:32:36,242 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15250 transitions. Word has length 23 [2021-06-05 22:32:36,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:36,242 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15250 transitions. [2021-06-05 22:32:36,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:36,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15250 transitions. [2021-06-05 22:32:36,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:36,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:36,247 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:36,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 22:32:36,447 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:36,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:36,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1241100023, now seen corresponding path program 42 times [2021-06-05 22:32:36,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:36,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371423144] [2021-06-05 22:32:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:36,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:36,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371423144] [2021-06-05 22:32:36,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371423144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:36,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417023981] [2021-06-05 22:32:36,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:36,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:32:36,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:36,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:36,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:36,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:36,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:36,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:36,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:36,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:36,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:32:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:36,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417023981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:36,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:36,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:36,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836169207] [2021-06-05 22:32:36,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:36,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:36,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:36,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:36,812 INFO L87 Difference]: Start difference. First operand 3638 states and 15250 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:37,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:37,338 INFO L93 Difference]: Finished difference Result 3803 states and 15863 transitions. [2021-06-05 22:32:37,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:32:37,338 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:37,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:37,344 INFO L225 Difference]: With dead ends: 3803 [2021-06-05 22:32:37,345 INFO L226 Difference]: Without dead ends: 3788 [2021-06-05 22:32:37,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 533.5ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:32:37,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3788 states. [2021-06-05 22:32:37,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3788 to 3630. [2021-06-05 22:32:37,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3629 states have (on average 4.192890603472031) internal successors, (15216), 3629 states have internal predecessors, (15216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:37,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 15216 transitions. [2021-06-05 22:32:37,394 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 15216 transitions. Word has length 23 [2021-06-05 22:32:37,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:37,394 INFO L482 AbstractCegarLoop]: Abstraction has 3630 states and 15216 transitions. [2021-06-05 22:32:37,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:37,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 15216 transitions. [2021-06-05 22:32:37,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:37,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:37,399 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:37,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:37,601 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:37,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:37,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1411914955, now seen corresponding path program 43 times [2021-06-05 22:32:37,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:37,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097459797] [2021-06-05 22:32:37,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:37,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:37,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097459797] [2021-06-05 22:32:37,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097459797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:37,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998457562] [2021-06-05 22:32:37,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:37,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:37,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:37,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:37,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:32:37,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:37,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:37,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:37,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:32:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:37,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998457562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:37,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:37,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:37,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168360297] [2021-06-05 22:32:37,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:37,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:37,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:37,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:37,917 INFO L87 Difference]: Start difference. First operand 3630 states and 15216 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:38,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:38,419 INFO L93 Difference]: Finished difference Result 3812 states and 15896 transitions. [2021-06-05 22:32:38,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:32:38,420 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:38,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:38,426 INFO L225 Difference]: With dead ends: 3812 [2021-06-05 22:32:38,427 INFO L226 Difference]: Without dead ends: 3797 [2021-06-05 22:32:38,427 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 426.7ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:32:38,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3797 states. [2021-06-05 22:32:38,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3797 to 3626. [2021-06-05 22:32:38,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.1931034482758625) internal successors, (15200), 3625 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:38,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15200 transitions. [2021-06-05 22:32:38,473 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15200 transitions. Word has length 23 [2021-06-05 22:32:38,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:38,473 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 15200 transitions. [2021-06-05 22:32:38,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:38,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15200 transitions. [2021-06-05 22:32:38,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:38,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:38,478 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:38,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 22:32:38,678 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:38,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:38,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1665661203, now seen corresponding path program 44 times [2021-06-05 22:32:38,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:38,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312328397] [2021-06-05 22:32:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:38,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:38,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312328397] [2021-06-05 22:32:38,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312328397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:38,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966442411] [2021-06-05 22:32:38,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:38,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:38,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:38,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:32:38,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:39,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:39,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 50 [2021-06-05 22:32:39,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:39,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:39,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:32:39,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:10 [2021-06-05 22:32:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:39,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966442411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:39,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:39,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:32:39,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836631031] [2021-06-05 22:32:39,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:32:39,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:39,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:32:39,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:32:39,042 INFO L87 Difference]: Start difference. First operand 3626 states and 15200 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:39,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:39,750 INFO L93 Difference]: Finished difference Result 4271 states and 17731 transitions. [2021-06-05 22:32:39,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:32:39,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:39,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:39,758 INFO L225 Difference]: With dead ends: 4271 [2021-06-05 22:32:39,758 INFO L226 Difference]: Without dead ends: 4249 [2021-06-05 22:32:39,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 465.3ms TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:32:39,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4249 states. [2021-06-05 22:32:39,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4249 to 3638. [2021-06-05 22:32:39,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.1946659334616445) internal successors, (15256), 3637 states have internal predecessors, (15256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:39,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15256 transitions. [2021-06-05 22:32:39,809 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15256 transitions. Word has length 23 [2021-06-05 22:32:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:39,809 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15256 transitions. [2021-06-05 22:32:39,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:39,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15256 transitions. [2021-06-05 22:32:39,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:39,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:39,814 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:40,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-06-05 22:32:40,015 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:40,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:40,015 INFO L82 PathProgramCache]: Analyzing trace with hash -2043972141, now seen corresponding path program 45 times [2021-06-05 22:32:40,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:40,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589672595] [2021-06-05 22:32:40,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:40,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:40,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589672595] [2021-06-05 22:32:40,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589672595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:40,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217404653] [2021-06-05 22:32:40,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:40,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:32:40,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:40,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:32:40,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:40,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:40,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 22:32:40,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:40,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:40,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:40,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:12 [2021-06-05 22:32:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:40,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217404653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:40,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:40,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:32:40,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342219228] [2021-06-05 22:32:40,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:32:40,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:40,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:32:40,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:32:40,370 INFO L87 Difference]: Start difference. First operand 3638 states and 15256 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:41,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:41,010 INFO L93 Difference]: Finished difference Result 4093 states and 17016 transitions. [2021-06-05 22:32:41,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:32:41,011 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:41,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:41,018 INFO L225 Difference]: With dead ends: 4093 [2021-06-05 22:32:41,018 INFO L226 Difference]: Without dead ends: 4067 [2021-06-05 22:32:41,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 520.4ms TimeCoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:32:41,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4067 states. [2021-06-05 22:32:41,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4067 to 3642. [2021-06-05 22:32:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3642 states, 3641 states have (on average 4.194452073606152) internal successors, (15272), 3641 states have internal predecessors, (15272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:41,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 15272 transitions. [2021-06-05 22:32:41,063 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 15272 transitions. Word has length 23 [2021-06-05 22:32:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:41,064 INFO L482 AbstractCegarLoop]: Abstraction has 3642 states and 15272 transitions. [2021-06-05 22:32:41,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:41,064 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 15272 transitions. [2021-06-05 22:32:41,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:41,068 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:41,068 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:41,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 22:32:41,269 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:41,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:41,269 INFO L82 PathProgramCache]: Analyzing trace with hash -430405407, now seen corresponding path program 46 times [2021-06-05 22:32:41,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:41,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018834818] [2021-06-05 22:32:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:41,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:41,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018834818] [2021-06-05 22:32:41,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018834818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:41,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688291574] [2021-06-05 22:32:41,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:41,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:41,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:41,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:41,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:41,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:41,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:41,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:41,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:41,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:41,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:32:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:41,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688291574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:41,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:41,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:41,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157381430] [2021-06-05 22:32:41,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:41,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:41,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:41,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:41,624 INFO L87 Difference]: Start difference. First operand 3642 states and 15272 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:42,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:42,463 INFO L93 Difference]: Finished difference Result 4158 states and 17272 transitions. [2021-06-05 22:32:42,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:32:42,464 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:42,471 INFO L225 Difference]: With dead ends: 4158 [2021-06-05 22:32:42,471 INFO L226 Difference]: Without dead ends: 4137 [2021-06-05 22:32:42,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 795.4ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:32:42,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4137 states. [2021-06-05 22:32:42,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4137 to 3634. [2021-06-05 22:32:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3633 states have (on average 4.1943297550233964) internal successors, (15238), 3633 states have internal predecessors, (15238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:42,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 15238 transitions. [2021-06-05 22:32:42,517 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 15238 transitions. Word has length 23 [2021-06-05 22:32:42,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:42,518 INFO L482 AbstractCegarLoop]: Abstraction has 3634 states and 15238 transitions. [2021-06-05 22:32:42,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:42,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 15238 transitions. [2021-06-05 22:32:42,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:42,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:42,522 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:42,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 22:32:42,723 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:42,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:42,723 INFO L82 PathProgramCache]: Analyzing trace with hash 2015158581, now seen corresponding path program 47 times [2021-06-05 22:32:42,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:42,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010116400] [2021-06-05 22:32:42,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:42,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:42,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010116400] [2021-06-05 22:32:42,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010116400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:42,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935827639] [2021-06-05 22:32:42,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:42,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:32:42,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:42,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:42,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:42,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:42,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:32:42,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:42,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:42,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:42,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:32:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:43,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935827639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:43,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:43,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:43,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542644624] [2021-06-05 22:32:43,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:43,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:43,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:43,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:43,052 INFO L87 Difference]: Start difference. First operand 3634 states and 15238 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:43,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:43,949 INFO L93 Difference]: Finished difference Result 4302 states and 17834 transitions. [2021-06-05 22:32:43,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:32:43,949 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:43,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:43,957 INFO L225 Difference]: With dead ends: 4302 [2021-06-05 22:32:43,958 INFO L226 Difference]: Without dead ends: 4267 [2021-06-05 22:32:43,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 677.0ms TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:32:43,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4267 states. [2021-06-05 22:32:43,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4267 to 3642. [2021-06-05 22:32:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3642 states, 3641 states have (on average 4.194452073606152) internal successors, (15272), 3641 states have internal predecessors, (15272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:44,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 15272 transitions. [2021-06-05 22:32:44,008 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 15272 transitions. Word has length 23 [2021-06-05 22:32:44,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:44,008 INFO L482 AbstractCegarLoop]: Abstraction has 3642 states and 15272 transitions. [2021-06-05 22:32:44,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:44,008 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 15272 transitions. [2021-06-05 22:32:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:44,013 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:44,013 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:44,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-06-05 22:32:44,214 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:44,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:44,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2096557637, now seen corresponding path program 48 times [2021-06-05 22:32:44,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:44,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57528166] [2021-06-05 22:32:44,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:44,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:44,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57528166] [2021-06-05 22:32:44,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57528166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:44,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475311852] [2021-06-05 22:32:44,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:44,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:32:44,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:44,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:44,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:44,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:44,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:44,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:44,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:44,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:44,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:32:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:44,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475311852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:44,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:44,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:44,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184800040] [2021-06-05 22:32:44,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:44,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:44,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:44,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:44,553 INFO L87 Difference]: Start difference. First operand 3642 states and 15272 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:45,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:45,382 INFO L93 Difference]: Finished difference Result 4116 states and 17103 transitions. [2021-06-05 22:32:45,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:32:45,382 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:45,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:45,389 INFO L225 Difference]: With dead ends: 4116 [2021-06-05 22:32:45,389 INFO L226 Difference]: Without dead ends: 4090 [2021-06-05 22:32:45,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 807.7ms TimeCoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:32:45,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2021-06-05 22:32:45,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3646. [2021-06-05 22:32:45,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3646 states, 3645 states have (on average 4.194238683127572) internal successors, (15288), 3645 states have internal predecessors, (15288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:45,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 15288 transitions. [2021-06-05 22:32:45,436 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 15288 transitions. Word has length 23 [2021-06-05 22:32:45,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:45,436 INFO L482 AbstractCegarLoop]: Abstraction has 3646 states and 15288 transitions. [2021-06-05 22:32:45,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:45,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 15288 transitions. [2021-06-05 22:32:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:45,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:45,441 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:45,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:45,642 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:45,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:45,642 INFO L82 PathProgramCache]: Analyzing trace with hash -584842925, now seen corresponding path program 49 times [2021-06-05 22:32:45,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:45,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320843564] [2021-06-05 22:32:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:45,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:45,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320843564] [2021-06-05 22:32:45,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320843564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:45,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535728028] [2021-06-05 22:32:45,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:45,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:45,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:45,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:45,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:45,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:45,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:45,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:45,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:32:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:46,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535728028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:46,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:46,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:46,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138060288] [2021-06-05 22:32:46,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:46,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:46,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:46,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:46,027 INFO L87 Difference]: Start difference. First operand 3646 states and 15288 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:46,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:46,847 INFO L93 Difference]: Finished difference Result 4175 states and 17331 transitions. [2021-06-05 22:32:46,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:32:46,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:46,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:46,855 INFO L225 Difference]: With dead ends: 4175 [2021-06-05 22:32:46,855 INFO L226 Difference]: Without dead ends: 4154 [2021-06-05 22:32:46,855 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 745.5ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:32:46,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2021-06-05 22:32:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 3626. [2021-06-05 22:32:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.1931034482758625) internal successors, (15200), 3625 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15200 transitions. [2021-06-05 22:32:46,903 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15200 transitions. Word has length 23 [2021-06-05 22:32:46,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:46,903 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 15200 transitions. [2021-06-05 22:32:46,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:46,903 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15200 transitions. [2021-06-05 22:32:46,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:46,908 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:46,908 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:47,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:47,109 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:47,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:47,109 INFO L82 PathProgramCache]: Analyzing trace with hash -448592937, now seen corresponding path program 50 times [2021-06-05 22:32:47,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:47,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337953006] [2021-06-05 22:32:47,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:47,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:47,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337953006] [2021-06-05 22:32:47,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337953006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:47,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374870249] [2021-06-05 22:32:47,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:47,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:47,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:47,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:47,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:47,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:47,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:32:47,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:47,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:47,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:47,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:32:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:47,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374870249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:47,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:47,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:47,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865650398] [2021-06-05 22:32:47,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:47,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:47,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:47,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:47,446 INFO L87 Difference]: Start difference. First operand 3626 states and 15200 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:48,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:48,145 INFO L93 Difference]: Finished difference Result 4118 states and 17119 transitions. [2021-06-05 22:32:48,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:32:48,146 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:48,153 INFO L225 Difference]: With dead ends: 4118 [2021-06-05 22:32:48,153 INFO L226 Difference]: Without dead ends: 4096 [2021-06-05 22:32:48,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 513.2ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:32:48,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4096 states. [2021-06-05 22:32:48,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4096 to 3634. [2021-06-05 22:32:48,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3633 states have (on average 4.193503991191853) internal successors, (15235), 3633 states have internal predecessors, (15235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:48,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 15235 transitions. [2021-06-05 22:32:48,200 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 15235 transitions. Word has length 23 [2021-06-05 22:32:48,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:48,200 INFO L482 AbstractCegarLoop]: Abstraction has 3634 states and 15235 transitions. [2021-06-05 22:32:48,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:48,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 15235 transitions. [2021-06-05 22:32:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:48,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:48,227 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:48,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 22:32:48,428 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:48,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:48,428 INFO L82 PathProgramCache]: Analyzing trace with hash 136741015, now seen corresponding path program 51 times [2021-06-05 22:32:48,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:48,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055672704] [2021-06-05 22:32:48,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:48,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:48,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055672704] [2021-06-05 22:32:48,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055672704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:48,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664491502] [2021-06-05 22:32:48,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:48,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:32:48,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:48,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:48,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:48,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:48,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:48,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:48,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:48,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:48,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:32:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:48,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664491502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:48,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:48,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:48,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22932753] [2021-06-05 22:32:48,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:48,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:48,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:48,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:48,769 INFO L87 Difference]: Start difference. First operand 3634 states and 15235 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:49,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:49,534 INFO L93 Difference]: Finished difference Result 3996 states and 16631 transitions. [2021-06-05 22:32:49,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:32:49,534 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:49,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:49,541 INFO L225 Difference]: With dead ends: 3996 [2021-06-05 22:32:49,541 INFO L226 Difference]: Without dead ends: 3970 [2021-06-05 22:32:49,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 703.6ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:32:49,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2021-06-05 22:32:49,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 3638. [2021-06-05 22:32:49,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193291174044542) internal successors, (15251), 3637 states have internal predecessors, (15251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:49,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15251 transitions. [2021-06-05 22:32:49,588 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15251 transitions. Word has length 23 [2021-06-05 22:32:49,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:49,588 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15251 transitions. [2021-06-05 22:32:49,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:49,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15251 transitions. [2021-06-05 22:32:49,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:49,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:49,593 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:49,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 22:32:49,794 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:49,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:49,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1750307749, now seen corresponding path program 52 times [2021-06-05 22:32:49,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:49,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355131593] [2021-06-05 22:32:49,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:49,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:49,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355131593] [2021-06-05 22:32:49,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355131593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:49,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308153046] [2021-06-05 22:32:49,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:49,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:49,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:49,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:49,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:50,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:50,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:50,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:50,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:50,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:50,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:32:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:50,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308153046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:50,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:50,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:50,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054108373] [2021-06-05 22:32:50,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:50,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:50,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:50,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:50,137 INFO L87 Difference]: Start difference. First operand 3638 states and 15251 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:50,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:50,953 INFO L93 Difference]: Finished difference Result 4014 states and 16703 transitions. [2021-06-05 22:32:50,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:32:50,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:50,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:50,961 INFO L225 Difference]: With dead ends: 4014 [2021-06-05 22:32:50,961 INFO L226 Difference]: Without dead ends: 3993 [2021-06-05 22:32:50,961 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 695.7ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:32:50,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3993 states. [2021-06-05 22:32:50,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3993 to 3630. [2021-06-05 22:32:51,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3629 states have (on average 4.193166161476991) internal successors, (15217), 3629 states have internal predecessors, (15217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 15217 transitions. [2021-06-05 22:32:51,007 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 15217 transitions. Word has length 23 [2021-06-05 22:32:51,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:51,007 INFO L482 AbstractCegarLoop]: Abstraction has 3630 states and 15217 transitions. [2021-06-05 22:32:51,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:51,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 15217 transitions. [2021-06-05 22:32:51,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:51,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:51,012 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:51,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:51,213 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:51,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:51,214 INFO L82 PathProgramCache]: Analyzing trace with hash -675814317, now seen corresponding path program 53 times [2021-06-05 22:32:51,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:51,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457737016] [2021-06-05 22:32:51,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:51,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:51,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457737016] [2021-06-05 22:32:51,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457737016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:51,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184231046] [2021-06-05 22:32:51,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:51,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:51,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:51,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:51,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:51,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:51,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:32:51,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:51,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:51,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:51,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:32:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:51,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184231046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:51,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:51,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:51,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550757102] [2021-06-05 22:32:51,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:51,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:51,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:51,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:51,541 INFO L87 Difference]: Start difference. First operand 3630 states and 15217 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:52,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:52,050 INFO L93 Difference]: Finished difference Result 3988 states and 16595 transitions. [2021-06-05 22:32:52,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:32:52,051 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:52,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:52,057 INFO L225 Difference]: With dead ends: 3988 [2021-06-05 22:32:52,058 INFO L226 Difference]: Without dead ends: 3966 [2021-06-05 22:32:52,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 487.1ms TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:32:52,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3966 states. [2021-06-05 22:32:52,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3966 to 3636. [2021-06-05 22:32:52,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 4.193672627235213) internal successors, (15244), 3635 states have internal predecessors, (15244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 15244 transitions. [2021-06-05 22:32:52,103 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 15244 transitions. Word has length 23 [2021-06-05 22:32:52,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:52,103 INFO L482 AbstractCegarLoop]: Abstraction has 3636 states and 15244 transitions. [2021-06-05 22:32:52,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:52,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 15244 transitions. [2021-06-05 22:32:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:52,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:52,108 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:52,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-05 22:32:52,309 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:52,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:52,309 INFO L82 PathProgramCache]: Analyzing trace with hash -162287465, now seen corresponding path program 54 times [2021-06-05 22:32:52,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:52,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703130502] [2021-06-05 22:32:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:52,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:52,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703130502] [2021-06-05 22:32:52,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703130502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:52,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713076988] [2021-06-05 22:32:52,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:52,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:32:52,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:52,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:52,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:52,584 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 22:32:52,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 68 [2021-06-05 22:32:52,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:52,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:52,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:52,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:48 [2021-06-05 22:32:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:52,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713076988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:52,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:52,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:32:52,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855220568] [2021-06-05 22:32:52,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:32:52,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:52,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:32:52,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:32:52,686 INFO L87 Difference]: Start difference. First operand 3636 states and 15244 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:53,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:53,363 INFO L93 Difference]: Finished difference Result 3940 states and 16403 transitions. [2021-06-05 22:32:53,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:32:53,364 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:53,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:53,370 INFO L225 Difference]: With dead ends: 3940 [2021-06-05 22:32:53,370 INFO L226 Difference]: Without dead ends: 3915 [2021-06-05 22:32:53,370 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 510.3ms TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:32:53,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3915 states. [2021-06-05 22:32:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3915 to 3640. [2021-06-05 22:32:53,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 4.193459741687277) internal successors, (15260), 3639 states have internal predecessors, (15260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:53,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 15260 transitions. [2021-06-05 22:32:53,416 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 15260 transitions. Word has length 23 [2021-06-05 22:32:53,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:53,416 INFO L482 AbstractCegarLoop]: Abstraction has 3640 states and 15260 transitions. [2021-06-05 22:32:53,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:53,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 15260 transitions. [2021-06-05 22:32:53,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:53,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:53,421 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:53,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:53,621 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:53,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:53,621 INFO L82 PathProgramCache]: Analyzing trace with hash 913423691, now seen corresponding path program 55 times [2021-06-05 22:32:53,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:53,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591766316] [2021-06-05 22:32:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:53,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:53,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591766316] [2021-06-05 22:32:53,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591766316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:53,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146445572] [2021-06-05 22:32:53,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:53,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:53,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:53,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:53,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:53,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:53,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:53,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:53,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:32:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:53,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146445572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:53,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:53,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:53,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050987315] [2021-06-05 22:32:53,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:53,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:53,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:53,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:53,946 INFO L87 Difference]: Start difference. First operand 3640 states and 15260 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:54,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:54,501 INFO L93 Difference]: Finished difference Result 3936 states and 16385 transitions. [2021-06-05 22:32:54,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:32:54,501 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:54,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:54,508 INFO L225 Difference]: With dead ends: 3936 [2021-06-05 22:32:54,508 INFO L226 Difference]: Without dead ends: 3915 [2021-06-05 22:32:54,508 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 487.4ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:32:54,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3915 states. [2021-06-05 22:32:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3915 to 3632. [2021-06-05 22:32:54,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3632 states, 3631 states have (on average 4.193335169374828) internal successors, (15226), 3631 states have internal predecessors, (15226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:54,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 15226 transitions. [2021-06-05 22:32:54,554 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 15226 transitions. Word has length 23 [2021-06-05 22:32:54,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:54,554 INFO L482 AbstractCegarLoop]: Abstraction has 3632 states and 15226 transitions. [2021-06-05 22:32:54,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:54,554 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 15226 transitions. [2021-06-05 22:32:54,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:54,559 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:54,559 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:54,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 22:32:54,761 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:54,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:54,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1194419543, now seen corresponding path program 56 times [2021-06-05 22:32:54,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:54,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956312903] [2021-06-05 22:32:54,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:54,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:54,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:54,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956312903] [2021-06-05 22:32:54,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956312903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:54,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193699442] [2021-06-05 22:32:54,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:54,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:54,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:54,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:54,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:54,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:54,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:54,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:55,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:55,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:55,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:32:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:55,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193699442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:55,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:55,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:55,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220359370] [2021-06-05 22:32:55,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:55,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:55,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:55,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:55,123 INFO L87 Difference]: Start difference. First operand 3632 states and 15226 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:55,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:55,740 INFO L93 Difference]: Finished difference Result 3969 states and 16526 transitions. [2021-06-05 22:32:55,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:32:55,740 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:55,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:55,747 INFO L225 Difference]: With dead ends: 3969 [2021-06-05 22:32:55,747 INFO L226 Difference]: Without dead ends: 3943 [2021-06-05 22:32:55,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 565.6ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:32:55,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2021-06-05 22:32:55,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3641. [2021-06-05 22:32:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3640 states have (on average 4.191758241758242) internal successors, (15258), 3640 states have internal predecessors, (15258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 15258 transitions. [2021-06-05 22:32:55,795 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 15258 transitions. Word has length 23 [2021-06-05 22:32:55,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:55,795 INFO L482 AbstractCegarLoop]: Abstraction has 3641 states and 15258 transitions. [2021-06-05 22:32:55,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:55,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 15258 transitions. [2021-06-05 22:32:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:55,800 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:55,800 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:56,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-05 22:32:56,001 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:56,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:56,001 INFO L82 PathProgramCache]: Analyzing trace with hash 152843475, now seen corresponding path program 57 times [2021-06-05 22:32:56,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:56,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798892184] [2021-06-05 22:32:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:56,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:56,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798892184] [2021-06-05 22:32:56,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798892184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:56,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272605581] [2021-06-05 22:32:56,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:56,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:32:56,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:56,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:56,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:56,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:56,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:56,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:56,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:56,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:56,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:32:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:56,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272605581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:56,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:56,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:56,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345993698] [2021-06-05 22:32:56,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:56,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:56,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:56,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:56,365 INFO L87 Difference]: Start difference. First operand 3641 states and 15258 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:57,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:57,017 INFO L93 Difference]: Finished difference Result 3976 states and 16549 transitions. [2021-06-05 22:32:57,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:32:57,018 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:57,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:57,024 INFO L225 Difference]: With dead ends: 3976 [2021-06-05 22:32:57,025 INFO L226 Difference]: Without dead ends: 3948 [2021-06-05 22:32:57,025 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 543.6ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:32:57,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-06-05 22:32:57,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3638. [2021-06-05 22:32:57,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193016222161122) internal successors, (15250), 3637 states have internal predecessors, (15250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:57,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15250 transitions. [2021-06-05 22:32:57,071 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15250 transitions. Word has length 23 [2021-06-05 22:32:57,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:57,071 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15250 transitions. [2021-06-05 22:32:57,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:57,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15250 transitions. [2021-06-05 22:32:57,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:57,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:57,076 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:57,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-06-05 22:32:57,277 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:57,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:57,277 INFO L82 PathProgramCache]: Analyzing trace with hash -134277877, now seen corresponding path program 58 times [2021-06-05 22:32:57,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:57,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618601409] [2021-06-05 22:32:57,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:57,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:57,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618601409] [2021-06-05 22:32:57,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618601409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:57,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414713068] [2021-06-05 22:32:57,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:57,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:57,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:57,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:57,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:57,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:57,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:57,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:57,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:57,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:57,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:32:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:57,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414713068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:57,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:57,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:57,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901854549] [2021-06-05 22:32:57,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:57,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:57,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:57,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:57,637 INFO L87 Difference]: Start difference. First operand 3638 states and 15250 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:58,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:58,166 INFO L93 Difference]: Finished difference Result 3893 states and 16217 transitions. [2021-06-05 22:32:58,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:32:58,167 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:58,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:58,173 INFO L225 Difference]: With dead ends: 3893 [2021-06-05 22:32:58,173 INFO L226 Difference]: Without dead ends: 3867 [2021-06-05 22:32:58,174 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 575.0ms TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:32:58,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2021-06-05 22:32:58,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3642. [2021-06-05 22:32:58,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3642 states, 3641 states have (on average 4.192804174677287) internal successors, (15266), 3641 states have internal predecessors, (15266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:58,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 15266 transitions. [2021-06-05 22:32:58,219 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 15266 transitions. Word has length 23 [2021-06-05 22:32:58,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:58,219 INFO L482 AbstractCegarLoop]: Abstraction has 3642 states and 15266 transitions. [2021-06-05 22:32:58,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:58,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 15266 transitions. [2021-06-05 22:32:58,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:58,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:58,224 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:58,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:58,425 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:58,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:58,425 INFO L82 PathProgramCache]: Analyzing trace with hash -627495263, now seen corresponding path program 59 times [2021-06-05 22:32:58,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:58,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079390588] [2021-06-05 22:32:58,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:58,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:58,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079390588] [2021-06-05 22:32:58,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079390588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:58,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272494898] [2021-06-05 22:32:58,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:58,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:32:58,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:58,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:58,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:58,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:58,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:58,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:58,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:58,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:58,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:32:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:58,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272494898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:58,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:58,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:32:58,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394334554] [2021-06-05 22:32:58,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:32:58,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:58,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:32:58,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:32:58,785 INFO L87 Difference]: Start difference. First operand 3642 states and 15266 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:59,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:59,356 INFO L93 Difference]: Finished difference Result 3906 states and 16269 transitions. [2021-06-05 22:32:59,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:32:59,356 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:32:59,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:59,363 INFO L225 Difference]: With dead ends: 3906 [2021-06-05 22:32:59,363 INFO L226 Difference]: Without dead ends: 3885 [2021-06-05 22:32:59,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 570.3ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:32:59,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2021-06-05 22:32:59,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3638. [2021-06-05 22:32:59,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193016222161122) internal successors, (15250), 3637 states have internal predecessors, (15250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15250 transitions. [2021-06-05 22:32:59,409 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15250 transitions. Word has length 23 [2021-06-05 22:32:59,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:59,409 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15250 transitions. [2021-06-05 22:32:59,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:59,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15250 transitions. [2021-06-05 22:32:59,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:32:59,414 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:59,414 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:59,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:59,614 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:59,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:59,615 INFO L82 PathProgramCache]: Analyzing trace with hash 307280993, now seen corresponding path program 60 times [2021-06-05 22:32:59,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:59,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179693838] [2021-06-05 22:32:59,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:59,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:59,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179693838] [2021-06-05 22:32:59,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179693838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:59,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378146345] [2021-06-05 22:32:59,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:59,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:32:59,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:59,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:32:59,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:59,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:59,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:32:59,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:59,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:59,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:59,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:33:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:00,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378146345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:00,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:00,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:00,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057695727] [2021-06-05 22:33:00,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:00,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:00,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:00,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:00,003 INFO L87 Difference]: Start difference. First operand 3638 states and 15250 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:00,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:00,547 INFO L93 Difference]: Finished difference Result 3896 states and 16227 transitions. [2021-06-05 22:33:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:33:00,548 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:00,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:00,554 INFO L225 Difference]: With dead ends: 3896 [2021-06-05 22:33:00,554 INFO L226 Difference]: Without dead ends: 3871 [2021-06-05 22:33:00,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 565.6ms TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:33:00,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-06-05 22:33:00,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3642. [2021-06-05 22:33:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3642 states, 3641 states have (on average 4.192804174677287) internal successors, (15266), 3641 states have internal predecessors, (15266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:00,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 15266 transitions. [2021-06-05 22:33:00,604 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 15266 transitions. Word has length 23 [2021-06-05 22:33:00,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:00,604 INFO L482 AbstractCegarLoop]: Abstraction has 3642 states and 15266 transitions. [2021-06-05 22:33:00,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:00,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 15266 transitions. [2021-06-05 22:33:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:00,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:00,609 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:00,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:00,809 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:00,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:00,810 INFO L82 PathProgramCache]: Analyzing trace with hash -705411539, now seen corresponding path program 61 times [2021-06-05 22:33:00,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:00,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741303979] [2021-06-05 22:33:00,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:00,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:00,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741303979] [2021-06-05 22:33:00,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741303979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:00,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052211802] [2021-06-05 22:33:00,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:00,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:00,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:01,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:01,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:01,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:01,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:01,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:01,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:33:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:01,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052211802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:01,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:01,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:01,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738835255] [2021-06-05 22:33:01,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:01,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:01,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:01,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:01,162 INFO L87 Difference]: Start difference. First operand 3642 states and 15266 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:01,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:01,612 INFO L93 Difference]: Finished difference Result 3910 states and 16281 transitions. [2021-06-05 22:33:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:33:01,612 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:01,619 INFO L225 Difference]: With dead ends: 3910 [2021-06-05 22:33:01,619 INFO L226 Difference]: Without dead ends: 3889 [2021-06-05 22:33:01,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 466.3ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:33:01,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2021-06-05 22:33:01,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 3638. [2021-06-05 22:33:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193016222161122) internal successors, (15250), 3637 states have internal predecessors, (15250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15250 transitions. [2021-06-05 22:33:01,664 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15250 transitions. Word has length 23 [2021-06-05 22:33:01,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:01,664 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15250 transitions. [2021-06-05 22:33:01,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:01,665 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15250 transitions. [2021-06-05 22:33:01,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:01,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:01,669 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:01,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 22:33:01,870 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:01,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:01,870 INFO L82 PathProgramCache]: Analyzing trace with hash 443454581, now seen corresponding path program 62 times [2021-06-05 22:33:01,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:01,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709797436] [2021-06-05 22:33:01,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:02,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:02,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709797436] [2021-06-05 22:33:02,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709797436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:02,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685191361] [2021-06-05 22:33:02,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:02,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:02,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:02,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:02,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:02,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:02,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:33:02,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:02,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:02,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:02,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:33:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:02,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685191361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:02,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:02,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:02,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819449254] [2021-06-05 22:33:02,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:02,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:02,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:02,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:02,241 INFO L87 Difference]: Start difference. First operand 3638 states and 15250 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:02,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:02,765 INFO L93 Difference]: Finished difference Result 4062 states and 16894 transitions. [2021-06-05 22:33:02,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:33:02,765 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:02,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:02,772 INFO L225 Difference]: With dead ends: 4062 [2021-06-05 22:33:02,772 INFO L226 Difference]: Without dead ends: 4027 [2021-06-05 22:33:02,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 421.7ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:33:02,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4027 states. [2021-06-05 22:33:02,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4027 to 3638. [2021-06-05 22:33:02,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.19191641462744) internal successors, (15246), 3637 states have internal predecessors, (15246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15246 transitions. [2021-06-05 22:33:02,822 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15246 transitions. Word has length 23 [2021-06-05 22:33:02,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:02,822 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15246 transitions. [2021-06-05 22:33:02,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:02,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15246 transitions. [2021-06-05 22:33:02,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:02,827 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:02,827 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:03,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:03,028 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:03,028 INFO L82 PathProgramCache]: Analyzing trace with hash -2106228679, now seen corresponding path program 63 times [2021-06-05 22:33:03,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:03,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629968176] [2021-06-05 22:33:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:03,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:03,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629968176] [2021-06-05 22:33:03,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629968176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:03,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79000288] [2021-06-05 22:33:03,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:03,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:33:03,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:03,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:03,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:03,301 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:33:03,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 22:33:03,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:33:03,328 INFO L628 ElimStorePlain]: treesize reduction 53, result has 24.3 percent of original size [2021-06-05 22:33:03,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:03,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:17 [2021-06-05 22:33:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:03,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79000288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:03,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:03,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:33:03,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577220937] [2021-06-05 22:33:03,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:33:03,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:03,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:33:03,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:33:03,391 INFO L87 Difference]: Start difference. First operand 3638 states and 15246 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:04,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:04,036 INFO L93 Difference]: Finished difference Result 4000 states and 16643 transitions. [2021-06-05 22:33:04,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:33:04,036 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:04,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:04,043 INFO L225 Difference]: With dead ends: 4000 [2021-06-05 22:33:04,043 INFO L226 Difference]: Without dead ends: 3974 [2021-06-05 22:33:04,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 499.9ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:33:04,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3974 states. [2021-06-05 22:33:04,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3974 to 3645. [2021-06-05 22:33:04,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3645 states, 3644 states have (on average 4.190450054884742) internal successors, (15270), 3644 states have internal predecessors, (15270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 15270 transitions. [2021-06-05 22:33:04,098 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 15270 transitions. Word has length 23 [2021-06-05 22:33:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:04,098 INFO L482 AbstractCegarLoop]: Abstraction has 3645 states and 15270 transitions. [2021-06-05 22:33:04,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:04,098 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 15270 transitions. [2021-06-05 22:33:04,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:04,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:04,103 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:04,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-06-05 22:33:04,304 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:04,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:04,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1147162549, now seen corresponding path program 64 times [2021-06-05 22:33:04,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:04,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621375997] [2021-06-05 22:33:04,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:04,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:04,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621375997] [2021-06-05 22:33:04,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621375997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:04,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429923803] [2021-06-05 22:33:04,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:04,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:04,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:04,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:04,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:04,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:04,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:33:04,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:04,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:04,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:04,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:33:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:04,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429923803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:04,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:04,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:04,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418642296] [2021-06-05 22:33:04,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:04,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:04,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:04,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:04,667 INFO L87 Difference]: Start difference. First operand 3645 states and 15270 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:05,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:05,247 INFO L93 Difference]: Finished difference Result 4011 states and 16687 transitions. [2021-06-05 22:33:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:33:05,248 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:05,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:05,254 INFO L225 Difference]: With dead ends: 4011 [2021-06-05 22:33:05,254 INFO L226 Difference]: Without dead ends: 3979 [2021-06-05 22:33:05,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 530.9ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:33:05,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2021-06-05 22:33:05,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 3638. [2021-06-05 22:33:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193291174044542) internal successors, (15251), 3637 states have internal predecessors, (15251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:05,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15251 transitions. [2021-06-05 22:33:05,301 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15251 transitions. Word has length 23 [2021-06-05 22:33:05,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:05,301 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15251 transitions. [2021-06-05 22:33:05,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:05,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15251 transitions. [2021-06-05 22:33:05,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:05,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:05,306 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:05,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:05,506 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:05,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:05,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2091459775, now seen corresponding path program 65 times [2021-06-05 22:33:05,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:05,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579151780] [2021-06-05 22:33:05,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:05,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:05,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579151780] [2021-06-05 22:33:05,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579151780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:05,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889288793] [2021-06-05 22:33:05,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:05,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:33:05,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:05,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:05,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:05,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:05,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:33:05,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:05,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:05,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:05,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:33:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:05,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889288793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:05,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:05,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:05,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134486957] [2021-06-05 22:33:05,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:05,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:05,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:05,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:05,839 INFO L87 Difference]: Start difference. First operand 3638 states and 15251 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:06,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:06,427 INFO L93 Difference]: Finished difference Result 4211 states and 17480 transitions. [2021-06-05 22:33:06,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:33:06,427 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:06,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:06,434 INFO L225 Difference]: With dead ends: 4211 [2021-06-05 22:33:06,435 INFO L226 Difference]: Without dead ends: 4176 [2021-06-05 22:33:06,435 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 521.6ms TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:33:06,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-05 22:33:06,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3646. [2021-06-05 22:33:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3646 states, 3645 states have (on average 4.193415637860082) internal successors, (15285), 3645 states have internal predecessors, (15285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 15285 transitions. [2021-06-05 22:33:06,483 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 15285 transitions. Word has length 23 [2021-06-05 22:33:06,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:06,483 INFO L482 AbstractCegarLoop]: Abstraction has 3646 states and 15285 transitions. [2021-06-05 22:33:06,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 15285 transitions. [2021-06-05 22:33:06,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:06,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:06,488 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:06,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 22:33:06,688 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:06,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:06,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1399108297, now seen corresponding path program 66 times [2021-06-05 22:33:06,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:06,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887196627] [2021-06-05 22:33:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:06,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:06,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887196627] [2021-06-05 22:33:06,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887196627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:06,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170693592] [2021-06-05 22:33:06,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:06,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:33:06,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:06,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:06,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:06,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:06,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:06,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:06,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:06,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:06,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:33:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:07,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170693592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:07,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:07,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:07,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597676499] [2021-06-05 22:33:07,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:07,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:07,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:07,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:07,052 INFO L87 Difference]: Start difference. First operand 3646 states and 15285 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:07,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:07,794 INFO L93 Difference]: Finished difference Result 4064 states and 16897 transitions. [2021-06-05 22:33:07,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:33:07,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:07,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:07,801 INFO L225 Difference]: With dead ends: 4064 [2021-06-05 22:33:07,801 INFO L226 Difference]: Without dead ends: 4038 [2021-06-05 22:33:07,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 720.7ms TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:33:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4038 states. [2021-06-05 22:33:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4038 to 3650. [2021-06-05 22:33:07,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3650 states, 3649 states have (on average 4.1932036174294325) internal successors, (15301), 3649 states have internal predecessors, (15301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:07,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3650 states to 3650 states and 15301 transitions. [2021-06-05 22:33:07,849 INFO L78 Accepts]: Start accepts. Automaton has 3650 states and 15301 transitions. Word has length 23 [2021-06-05 22:33:07,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:07,849 INFO L482 AbstractCegarLoop]: Abstraction has 3650 states and 15301 transitions. [2021-06-05 22:33:07,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:07,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3650 states and 15301 transitions. [2021-06-05 22:33:07,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:07,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:07,854 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:08,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 22:33:08,055 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:08,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:08,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1282292265, now seen corresponding path program 67 times [2021-06-05 22:33:08,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:08,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743066205] [2021-06-05 22:33:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:08,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:08,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743066205] [2021-06-05 22:33:08,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743066205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:08,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97922061] [2021-06-05 22:33:08,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:08,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:08,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:08,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:08,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:08,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:08,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:08,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:08,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:33:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:08,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97922061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:08,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:08,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:08,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029930204] [2021-06-05 22:33:08,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:08,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:08,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:08,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:08,394 INFO L87 Difference]: Start difference. First operand 3650 states and 15301 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:09,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:09,175 INFO L93 Difference]: Finished difference Result 4120 states and 17113 transitions. [2021-06-05 22:33:09,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:33:09,175 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:09,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:09,183 INFO L225 Difference]: With dead ends: 4120 [2021-06-05 22:33:09,183 INFO L226 Difference]: Without dead ends: 4099 [2021-06-05 22:33:09,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 674.7ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:33:09,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2021-06-05 22:33:09,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 3638. [2021-06-05 22:33:09,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193291174044542) internal successors, (15251), 3637 states have internal predecessors, (15251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:09,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15251 transitions. [2021-06-05 22:33:09,230 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15251 transitions. Word has length 23 [2021-06-05 22:33:09,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:09,230 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15251 transitions. [2021-06-05 22:33:09,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:09,230 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15251 transitions. [2021-06-05 22:33:09,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:09,235 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:09,235 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:09,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:09,435 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:09,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:09,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1191147191, now seen corresponding path program 68 times [2021-06-05 22:33:09,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:09,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423071986] [2021-06-05 22:33:09,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:09,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:09,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423071986] [2021-06-05 22:33:09,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423071986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:09,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769638897] [2021-06-05 22:33:09,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:09,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:09,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:09,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:09,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:09,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:09,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:09,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:09,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:09,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:09,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:33:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:09,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769638897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:09,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:09,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:09,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751213161] [2021-06-05 22:33:09,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:09,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:09,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:09,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:09,796 INFO L87 Difference]: Start difference. First operand 3638 states and 15251 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:10,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:10,355 INFO L93 Difference]: Finished difference Result 3976 states and 16555 transitions. [2021-06-05 22:33:10,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:33:10,356 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:10,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:10,362 INFO L225 Difference]: With dead ends: 3976 [2021-06-05 22:33:10,363 INFO L226 Difference]: Without dead ends: 3950 [2021-06-05 22:33:10,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 538.4ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:33:10,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2021-06-05 22:33:10,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 3647. [2021-06-05 22:33:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3647 states, 3646 states have (on average 4.191716950082282) internal successors, (15283), 3646 states have internal predecessors, (15283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:10,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3647 states to 3647 states and 15283 transitions. [2021-06-05 22:33:10,410 INFO L78 Accepts]: Start accepts. Automaton has 3647 states and 15283 transitions. Word has length 23 [2021-06-05 22:33:10,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:10,410 INFO L482 AbstractCegarLoop]: Abstraction has 3647 states and 15283 transitions. [2021-06-05 22:33:10,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:10,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3647 states and 15283 transitions. [2021-06-05 22:33:10,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:10,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:10,415 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:10,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:10,615 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:10,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:10,616 INFO L82 PathProgramCache]: Analyzing trace with hash 2062244037, now seen corresponding path program 69 times [2021-06-05 22:33:10,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:10,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647814593] [2021-06-05 22:33:10,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:10,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:10,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647814593] [2021-06-05 22:33:10,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647814593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:10,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507041061] [2021-06-05 22:33:10,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:10,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:33:10,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:10,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:10,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:10,875 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:33:10,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 22:33:10,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:10,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:10,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:10,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:41 [2021-06-05 22:33:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:10,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507041061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:10,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:10,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:33:10,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129437242] [2021-06-05 22:33:10,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:33:10,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:10,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:33:10,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:33:10,995 INFO L87 Difference]: Start difference. First operand 3647 states and 15283 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:11,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:11,748 INFO L93 Difference]: Finished difference Result 3937 states and 16396 transitions. [2021-06-05 22:33:11,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:33:11,748 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:11,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:11,754 INFO L225 Difference]: With dead ends: 3937 [2021-06-05 22:33:11,755 INFO L226 Difference]: Without dead ends: 3909 [2021-06-05 22:33:11,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 633.3ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:33:11,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2021-06-05 22:33:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 3640. [2021-06-05 22:33:11,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 4.193184940917835) internal successors, (15259), 3639 states have internal predecessors, (15259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:11,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 15259 transitions. [2021-06-05 22:33:11,801 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 15259 transitions. Word has length 23 [2021-06-05 22:33:11,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:11,801 INFO L482 AbstractCegarLoop]: Abstraction has 3640 states and 15259 transitions. [2021-06-05 22:33:11,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:11,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 15259 transitions. [2021-06-05 22:33:11,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:11,806 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:11,806 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:12,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:12,007 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:12,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:12,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1775122685, now seen corresponding path program 70 times [2021-06-05 22:33:12,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:12,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781679792] [2021-06-05 22:33:12,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:12,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:12,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781679792] [2021-06-05 22:33:12,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781679792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:12,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135192526] [2021-06-05 22:33:12,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:12,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:12,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:12,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:12,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:12,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:12,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:12,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:12,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:12,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:12,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:33:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:12,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135192526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:12,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:12,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:12,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222780623] [2021-06-05 22:33:12,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:12,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:12,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:12,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:12,380 INFO L87 Difference]: Start difference. First operand 3640 states and 15259 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:12,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:12,963 INFO L93 Difference]: Finished difference Result 3892 states and 16214 transitions. [2021-06-05 22:33:12,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:33:12,963 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:12,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:12,970 INFO L225 Difference]: With dead ends: 3892 [2021-06-05 22:33:12,970 INFO L226 Difference]: Without dead ends: 3866 [2021-06-05 22:33:12,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 581.5ms TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:33:12,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3866 states. [2021-06-05 22:33:13,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3866 to 3644. [2021-06-05 22:33:13,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 4.192972824595114) internal successors, (15275), 3643 states have internal predecessors, (15275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 15275 transitions. [2021-06-05 22:33:13,015 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 15275 transitions. Word has length 23 [2021-06-05 22:33:13,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:13,015 INFO L482 AbstractCegarLoop]: Abstraction has 3644 states and 15275 transitions. [2021-06-05 22:33:13,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:13,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 15275 transitions. [2021-06-05 22:33:13,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:13,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:13,020 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:13,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 22:33:13,221 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:13,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:13,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1281905299, now seen corresponding path program 71 times [2021-06-05 22:33:13,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:13,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429618185] [2021-06-05 22:33:13,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:13,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:13,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429618185] [2021-06-05 22:33:13,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429618185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:13,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585024122] [2021-06-05 22:33:13,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:13,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:33:13,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:13,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:13,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:13,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:13,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:13,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:13,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:13,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:13,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:33:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:13,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585024122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:13,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:13,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:13,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95647518] [2021-06-05 22:33:13,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:13,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:13,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:13,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:13,581 INFO L87 Difference]: Start difference. First operand 3644 states and 15275 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:14,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:14,147 INFO L93 Difference]: Finished difference Result 3906 states and 16270 transitions. [2021-06-05 22:33:14,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:33:14,148 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:14,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:14,155 INFO L225 Difference]: With dead ends: 3906 [2021-06-05 22:33:14,156 INFO L226 Difference]: Without dead ends: 3885 [2021-06-05 22:33:14,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 583.5ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:33:14,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2021-06-05 22:33:14,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3640. [2021-06-05 22:33:14,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 4.193184940917835) internal successors, (15259), 3639 states have internal predecessors, (15259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:14,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 15259 transitions. [2021-06-05 22:33:14,204 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 15259 transitions. Word has length 23 [2021-06-05 22:33:14,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:14,204 INFO L482 AbstractCegarLoop]: Abstraction has 3640 states and 15259 transitions. [2021-06-05 22:33:14,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:14,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 15259 transitions. [2021-06-05 22:33:14,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:14,209 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:14,209 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:14,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:14,413 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:14,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:14,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2078285741, now seen corresponding path program 72 times [2021-06-05 22:33:14,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:14,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760402429] [2021-06-05 22:33:14,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:14,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:14,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760402429] [2021-06-05 22:33:14,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760402429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:14,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706262100] [2021-06-05 22:33:14,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:14,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:33:14,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:14,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:14,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:14,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:14,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:14,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:14,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:14,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:14,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:33:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:14,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706262100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:14,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:14,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:14,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544249669] [2021-06-05 22:33:14,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:14,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:14,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:14,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:14,767 INFO L87 Difference]: Start difference. First operand 3640 states and 15259 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:15,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:15,352 INFO L93 Difference]: Finished difference Result 3895 states and 16224 transitions. [2021-06-05 22:33:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:33:15,352 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:15,359 INFO L225 Difference]: With dead ends: 3895 [2021-06-05 22:33:15,359 INFO L226 Difference]: Without dead ends: 3870 [2021-06-05 22:33:15,359 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 544.3ms TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:33:15,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2021-06-05 22:33:15,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 3644. [2021-06-05 22:33:15,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 4.192972824595114) internal successors, (15275), 3643 states have internal predecessors, (15275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:15,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 15275 transitions. [2021-06-05 22:33:15,405 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 15275 transitions. Word has length 23 [2021-06-05 22:33:15,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:15,405 INFO L482 AbstractCegarLoop]: Abstraction has 3644 states and 15275 transitions. [2021-06-05 22:33:15,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:15,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 15275 transitions. [2021-06-05 22:33:15,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:15,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:15,410 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:15,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:15,615 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:15,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:15,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1203989023, now seen corresponding path program 73 times [2021-06-05 22:33:15,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:15,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613536558] [2021-06-05 22:33:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:15,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:15,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613536558] [2021-06-05 22:33:15,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613536558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:15,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827287614] [2021-06-05 22:33:15,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:15,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:15,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:15,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:15,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:15,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:15,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:15,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:15,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:33:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:15,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827287614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:15,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:15,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:15,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13813057] [2021-06-05 22:33:15,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:15,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:15,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:15,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:15,989 INFO L87 Difference]: Start difference. First operand 3644 states and 15275 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:16,551 INFO L93 Difference]: Finished difference Result 3910 states and 16282 transitions. [2021-06-05 22:33:16,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:33:16,552 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:16,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:16,559 INFO L225 Difference]: With dead ends: 3910 [2021-06-05 22:33:16,559 INFO L226 Difference]: Without dead ends: 3889 [2021-06-05 22:33:16,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 468.5ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:33:16,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2021-06-05 22:33:16,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 3640. [2021-06-05 22:33:16,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 4.193184940917835) internal successors, (15259), 3639 states have internal predecessors, (15259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 15259 transitions. [2021-06-05 22:33:16,605 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 15259 transitions. Word has length 23 [2021-06-05 22:33:16,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:16,605 INFO L482 AbstractCegarLoop]: Abstraction has 3640 states and 15259 transitions. [2021-06-05 22:33:16,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:16,605 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 15259 transitions. [2021-06-05 22:33:16,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:16,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:16,610 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:16,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:16,810 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:16,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:16,810 INFO L82 PathProgramCache]: Analyzing trace with hash 859421919, now seen corresponding path program 74 times [2021-06-05 22:33:16,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:16,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092116502] [2021-06-05 22:33:16,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:16,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:16,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092116502] [2021-06-05 22:33:16,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092116502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:16,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683629326] [2021-06-05 22:33:16,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:16,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:16,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:16,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:16,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:17,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:17,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:33:17,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:17,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:17,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:17,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:33:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:17,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683629326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:17,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:17,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:17,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249535604] [2021-06-05 22:33:17,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:17,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:17,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:17,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:17,134 INFO L87 Difference]: Start difference. First operand 3640 states and 15259 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:17,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:17,769 INFO L93 Difference]: Finished difference Result 4232 states and 17572 transitions. [2021-06-05 22:33:17,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:33:17,769 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:17,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:17,776 INFO L225 Difference]: With dead ends: 4232 [2021-06-05 22:33:17,777 INFO L226 Difference]: Without dead ends: 4210 [2021-06-05 22:33:17,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 591.4ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:33:17,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4210 states. [2021-06-05 22:33:17,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4210 to 3652. [2021-06-05 22:33:17,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3652 states, 3651 states have (on average 4.191454396055875) internal successors, (15303), 3651 states have internal predecessors, (15303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:17,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3652 states to 3652 states and 15303 transitions. [2021-06-05 22:33:17,828 INFO L78 Accepts]: Start accepts. Automaton has 3652 states and 15303 transitions. Word has length 23 [2021-06-05 22:33:17,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:17,828 INFO L482 AbstractCegarLoop]: Abstraction has 3652 states and 15303 transitions. [2021-06-05 22:33:17,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:17,828 INFO L276 IsEmpty]: Start isEmpty. Operand 3652 states and 15303 transitions. [2021-06-05 22:33:17,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:17,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:17,833 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:18,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:18,033 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:18,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:18,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1444755871, now seen corresponding path program 75 times [2021-06-05 22:33:18,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:18,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988523619] [2021-06-05 22:33:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:18,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:18,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988523619] [2021-06-05 22:33:18,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988523619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:18,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431650748] [2021-06-05 22:33:18,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:18,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:33:18,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:18,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:18,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:18,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:18,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:18,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:18,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:18,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:18,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:33:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:18,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431650748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:18,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:18,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:18,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790216588] [2021-06-05 22:33:18,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:18,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:18,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:18,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:18,418 INFO L87 Difference]: Start difference. First operand 3652 states and 15303 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:19,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:19,286 INFO L93 Difference]: Finished difference Result 4128 states and 17141 transitions. [2021-06-05 22:33:19,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:33:19,286 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:19,293 INFO L225 Difference]: With dead ends: 4128 [2021-06-05 22:33:19,293 INFO L226 Difference]: Without dead ends: 4102 [2021-06-05 22:33:19,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 856.0ms TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:33:19,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2021-06-05 22:33:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 3656. [2021-06-05 22:33:19,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 3655 states have (on average 4.191244870041039) internal successors, (15319), 3655 states have internal predecessors, (15319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:19,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 15319 transitions. [2021-06-05 22:33:19,341 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 15319 transitions. Word has length 23 [2021-06-05 22:33:19,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:19,341 INFO L482 AbstractCegarLoop]: Abstraction has 3656 states and 15319 transitions. [2021-06-05 22:33:19,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:19,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 15319 transitions. [2021-06-05 22:33:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:19,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:19,347 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:19,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 22:33:19,547 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:19,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1236644691, now seen corresponding path program 76 times [2021-06-05 22:33:19,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:19,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936155581] [2021-06-05 22:33:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:19,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:19,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936155581] [2021-06-05 22:33:19,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936155581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:19,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945752074] [2021-06-05 22:33:19,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:19,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:19,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:19,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:19,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:19,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:19,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:19,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:19,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:19,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:19,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:33:19,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:19,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945752074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:19,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:19,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:19,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032002715] [2021-06-05 22:33:19,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:19,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:19,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:19,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:19,882 INFO L87 Difference]: Start difference. First operand 3656 states and 15319 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:20,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:20,686 INFO L93 Difference]: Finished difference Result 4082 states and 16965 transitions. [2021-06-05 22:33:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:33:20,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:20,711 INFO L225 Difference]: With dead ends: 4082 [2021-06-05 22:33:20,711 INFO L226 Difference]: Without dead ends: 4061 [2021-06-05 22:33:20,711 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 773.7ms TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:33:20,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2021-06-05 22:33:20,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 3648. [2021-06-05 22:33:20,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3648 states, 3647 states have (on average 4.191115985741705) internal successors, (15285), 3647 states have internal predecessors, (15285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:20,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 15285 transitions. [2021-06-05 22:33:20,758 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 15285 transitions. Word has length 23 [2021-06-05 22:33:20,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:20,758 INFO L482 AbstractCegarLoop]: Abstraction has 3648 states and 15285 transitions. [2021-06-05 22:33:20,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:20,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 15285 transitions. [2021-06-05 22:33:20,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:20,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:20,763 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:20,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 22:33:20,964 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:20,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:20,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1208919297, now seen corresponding path program 77 times [2021-06-05 22:33:20,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:20,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584932276] [2021-06-05 22:33:20,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:21,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:21,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584932276] [2021-06-05 22:33:21,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584932276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:21,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322318900] [2021-06-05 22:33:21,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:21,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:33:21,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:21,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:21,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:21,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:21,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:33:21,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:21,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:21,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:21,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:33:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:21,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322318900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:21,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:21,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:21,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755723596] [2021-06-05 22:33:21,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:21,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:21,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:21,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:21,296 INFO L87 Difference]: Start difference. First operand 3648 states and 15285 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:22,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:22,013 INFO L93 Difference]: Finished difference Result 4272 states and 17685 transitions. [2021-06-05 22:33:22,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:33:22,014 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:22,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:22,021 INFO L225 Difference]: With dead ends: 4272 [2021-06-05 22:33:22,021 INFO L226 Difference]: Without dead ends: 4237 [2021-06-05 22:33:22,022 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 634.3ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:33:22,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4237 states. [2021-06-05 22:33:22,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4237 to 3641. [2021-06-05 22:33:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3640 states have (on average 4.187637362637362) internal successors, (15243), 3640 states have internal predecessors, (15243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:22,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 15243 transitions. [2021-06-05 22:33:22,071 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 15243 transitions. Word has length 23 [2021-06-05 22:33:22,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:22,071 INFO L482 AbstractCegarLoop]: Abstraction has 3641 states and 15243 transitions. [2021-06-05 22:33:22,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:22,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 15243 transitions. [2021-06-05 22:33:22,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:22,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:22,076 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:22,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-05 22:33:22,277 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:22,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:22,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1290318353, now seen corresponding path program 78 times [2021-06-05 22:33:22,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:22,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087017133] [2021-06-05 22:33:22,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:22,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:22,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087017133] [2021-06-05 22:33:22,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087017133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:22,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577103478] [2021-06-05 22:33:22,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:22,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:33:22,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:22,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:22,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:22,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:22,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:22,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:22,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:22,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:22,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:33:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:22,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577103478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:22,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:22,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:22,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830360307] [2021-06-05 22:33:22,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:22,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:22,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:22,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:22,639 INFO L87 Difference]: Start difference. First operand 3641 states and 15243 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:23,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:23,556 INFO L93 Difference]: Finished difference Result 4077 states and 16923 transitions. [2021-06-05 22:33:23,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:33:23,556 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:23,563 INFO L225 Difference]: With dead ends: 4077 [2021-06-05 22:33:23,563 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 22:33:23,563 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 822.7ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:33:23,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 22:33:23,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3645. [2021-06-05 22:33:23,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3645 states, 3644 states have (on average 4.187431394072448) internal successors, (15259), 3644 states have internal predecessors, (15259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 15259 transitions. [2021-06-05 22:33:23,610 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 15259 transitions. Word has length 23 [2021-06-05 22:33:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:23,610 INFO L482 AbstractCegarLoop]: Abstraction has 3645 states and 15259 transitions. [2021-06-05 22:33:23,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 15259 transitions. [2021-06-05 22:33:23,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:23,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:23,615 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:23,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 22:33:23,816 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:23,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:23,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1391082209, now seen corresponding path program 79 times [2021-06-05 22:33:23,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:23,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536484513] [2021-06-05 22:33:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:23,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:23,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536484513] [2021-06-05 22:33:23,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536484513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:23,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767009572] [2021-06-05 22:33:23,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:23,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:23,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:24,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:24,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:24,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:24,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:24,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:24,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:33:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:24,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767009572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:24,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:24,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:24,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469894540] [2021-06-05 22:33:24,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:24,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:24,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:24,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:24,174 INFO L87 Difference]: Start difference. First operand 3645 states and 15259 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:25,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:25,037 INFO L93 Difference]: Finished difference Result 4052 states and 16830 transitions. [2021-06-05 22:33:25,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:33:25,037 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:25,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:25,044 INFO L225 Difference]: With dead ends: 4052 [2021-06-05 22:33:25,045 INFO L226 Difference]: Without dead ends: 4031 [2021-06-05 22:33:25,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 734.4ms TimeCoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:33:25,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4031 states. [2021-06-05 22:33:25,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4031 to 3625. [2021-06-05 22:33:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3625 states, 3624 states have (on average 4.186258278145695) internal successors, (15171), 3624 states have internal predecessors, (15171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 15171 transitions. [2021-06-05 22:33:25,095 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 15171 transitions. Word has length 23 [2021-06-05 22:33:25,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:25,096 INFO L482 AbstractCegarLoop]: Abstraction has 3625 states and 15171 transitions. [2021-06-05 22:33:25,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:25,096 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 15171 transitions. [2021-06-05 22:33:25,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:25,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:25,101 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:25,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:25,302 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:25,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:25,302 INFO L82 PathProgramCache]: Analyzing trace with hash 925880935, now seen corresponding path program 80 times [2021-06-05 22:33:25,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:25,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572127472] [2021-06-05 22:33:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:25,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:25,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572127472] [2021-06-05 22:33:25,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572127472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:25,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937664758] [2021-06-05 22:33:25,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:25,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:25,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:25,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:25,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:25,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:25,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:33:25,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:25,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:25,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:25,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:33:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:25,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937664758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:25,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:25,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:25,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350991071] [2021-06-05 22:33:25,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:25,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:25,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:25,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:25,674 INFO L87 Difference]: Start difference. First operand 3625 states and 15171 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:26,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:26,256 INFO L93 Difference]: Finished difference Result 4150 states and 17232 transitions. [2021-06-05 22:33:26,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:33:26,256 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:26,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:26,263 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 22:33:26,263 INFO L226 Difference]: Without dead ends: 4128 [2021-06-05 22:33:26,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 513.0ms TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:33:26,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-05 22:33:26,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3633. [2021-06-05 22:33:26,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3633 states, 3632 states have (on average 4.186398678414097) internal successors, (15205), 3632 states have internal predecessors, (15205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:26,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 15205 transitions. [2021-06-05 22:33:26,312 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 15205 transitions. Word has length 23 [2021-06-05 22:33:26,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:26,312 INFO L482 AbstractCegarLoop]: Abstraction has 3633 states and 15205 transitions. [2021-06-05 22:33:26,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:26,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 15205 transitions. [2021-06-05 22:33:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:26,317 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:26,317 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:26,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-05 22:33:26,518 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:26,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:26,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1511214887, now seen corresponding path program 81 times [2021-06-05 22:33:26,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:26,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009296461] [2021-06-05 22:33:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:26,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:26,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009296461] [2021-06-05 22:33:26,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009296461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:26,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736297830] [2021-06-05 22:33:26,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:26,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:33:26,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:26,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:26,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:26,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:26,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:26,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:26,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:26,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:26,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:33:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:26,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736297830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:26,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:26,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:26,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295994522] [2021-06-05 22:33:26,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:26,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:26,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:26,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:26,864 INFO L87 Difference]: Start difference. First operand 3633 states and 15205 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:27,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:27,685 INFO L93 Difference]: Finished difference Result 4049 states and 16819 transitions. [2021-06-05 22:33:27,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:33:27,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:27,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:27,693 INFO L225 Difference]: With dead ends: 4049 [2021-06-05 22:33:27,693 INFO L226 Difference]: Without dead ends: 4023 [2021-06-05 22:33:27,693 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 752.1ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:33:27,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4023 states. [2021-06-05 22:33:27,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4023 to 3637. [2021-06-05 22:33:27,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3637 states, 3636 states have (on average 4.186193619361936) internal successors, (15221), 3636 states have internal predecessors, (15221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:27,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3637 states to 3637 states and 15221 transitions. [2021-06-05 22:33:27,759 INFO L78 Accepts]: Start accepts. Automaton has 3637 states and 15221 transitions. Word has length 23 [2021-06-05 22:33:27,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:27,759 INFO L482 AbstractCegarLoop]: Abstraction has 3637 states and 15221 transitions. [2021-06-05 22:33:27,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:27,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3637 states and 15221 transitions. [2021-06-05 22:33:27,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:27,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:27,764 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:27,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 22:33:27,965 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:27,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:27,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1170185675, now seen corresponding path program 82 times [2021-06-05 22:33:27,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:27,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854113808] [2021-06-05 22:33:27,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:28,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:28,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854113808] [2021-06-05 22:33:28,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854113808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:28,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101428832] [2021-06-05 22:33:28,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:28,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:28,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:28,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:28,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:28,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:28,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:28,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:28,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:28,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:28,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:33:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:28,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101428832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:28,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:28,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:28,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453456214] [2021-06-05 22:33:28,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:28,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:28,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:28,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:28,304 INFO L87 Difference]: Start difference. First operand 3637 states and 15221 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:29,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:29,046 INFO L93 Difference]: Finished difference Result 4005 states and 16651 transitions. [2021-06-05 22:33:29,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:33:29,046 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:29,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:29,053 INFO L225 Difference]: With dead ends: 4005 [2021-06-05 22:33:29,053 INFO L226 Difference]: Without dead ends: 3984 [2021-06-05 22:33:29,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 690.0ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:33:29,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3984 states. [2021-06-05 22:33:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3984 to 3629. [2021-06-05 22:33:29,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 3628 states have (on average 4.186052921719956) internal successors, (15187), 3628 states have internal predecessors, (15187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:29,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 15187 transitions. [2021-06-05 22:33:29,102 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 15187 transitions. Word has length 23 [2021-06-05 22:33:29,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:29,102 INFO L482 AbstractCegarLoop]: Abstraction has 3629 states and 15187 transitions. [2021-06-05 22:33:29,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:29,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 15187 transitions. [2021-06-05 22:33:29,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:29,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:29,107 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:29,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 22:33:29,308 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:29,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:29,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1080318453, now seen corresponding path program 83 times [2021-06-05 22:33:29,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:29,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689082268] [2021-06-05 22:33:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:29,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:29,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689082268] [2021-06-05 22:33:29,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689082268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:29,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269944570] [2021-06-05 22:33:29,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:29,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:29,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:29,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:29,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:29,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:29,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:33:29,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:29,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:29,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:29,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:33:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:29,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269944570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:29,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:29,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:29,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176212122] [2021-06-05 22:33:29,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:29,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:29,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:29,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:29,640 INFO L87 Difference]: Start difference. First operand 3629 states and 15187 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:30,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:30,139 INFO L93 Difference]: Finished difference Result 3993 states and 16603 transitions. [2021-06-05 22:33:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:33:30,139 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:30,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:30,146 INFO L225 Difference]: With dead ends: 3993 [2021-06-05 22:33:30,146 INFO L226 Difference]: Without dead ends: 3970 [2021-06-05 22:33:30,146 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 432.3ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:33:30,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2021-06-05 22:33:30,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 3621. [2021-06-05 22:33:30,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3621 states, 3620 states have (on average 4.185911602209945) internal successors, (15153), 3620 states have internal predecessors, (15153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:30,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3621 states to 3621 states and 15153 transitions. [2021-06-05 22:33:30,193 INFO L78 Accepts]: Start accepts. Automaton has 3621 states and 15153 transitions. Word has length 23 [2021-06-05 22:33:30,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:30,193 INFO L482 AbstractCegarLoop]: Abstraction has 3621 states and 15153 transitions. [2021-06-05 22:33:30,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:30,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3621 states and 15153 transitions. [2021-06-05 22:33:30,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:30,198 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:30,198 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:30,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:30,398 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:30,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:30,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1750800029, now seen corresponding path program 84 times [2021-06-05 22:33:30,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:30,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841160535] [2021-06-05 22:33:30,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:30,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:30,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841160535] [2021-06-05 22:33:30,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841160535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:30,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100520619] [2021-06-05 22:33:30,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:30,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:33:30,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:30,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:33:30,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:30,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:30,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 50 [2021-06-05 22:33:30,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:30,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:30,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:33:30,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:10 [2021-06-05 22:33:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:30,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100520619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:30,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:30,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:33:30,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044481569] [2021-06-05 22:33:30,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:33:30,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:30,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:33:30,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:33:30,724 INFO L87 Difference]: Start difference. First operand 3621 states and 15153 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:31,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:31,284 INFO L93 Difference]: Finished difference Result 3897 states and 16215 transitions. [2021-06-05 22:33:31,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:33:31,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:31,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:31,292 INFO L225 Difference]: With dead ends: 3897 [2021-06-05 22:33:31,292 INFO L226 Difference]: Without dead ends: 3875 [2021-06-05 22:33:31,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 413.1ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:33:31,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2021-06-05 22:33:31,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 3625. [2021-06-05 22:33:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3625 states, 3624 states have (on average 4.186258278145695) internal successors, (15171), 3624 states have internal predecessors, (15171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 15171 transitions. [2021-06-05 22:33:31,339 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 15171 transitions. Word has length 23 [2021-06-05 22:33:31,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:31,339 INFO L482 AbstractCegarLoop]: Abstraction has 3625 states and 15171 transitions. [2021-06-05 22:33:31,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:31,339 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 15171 transitions. [2021-06-05 22:33:31,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:31,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:31,344 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:31,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:31,544 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:31,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:31,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1237273177, now seen corresponding path program 85 times [2021-06-05 22:33:31,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:31,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876464363] [2021-06-05 22:33:31,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:31,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:31,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876464363] [2021-06-05 22:33:31,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876464363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:31,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754352456] [2021-06-05 22:33:31,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:31,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:31,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:31,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:31,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:31,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:31,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:31,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:31,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:33:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:31,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754352456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:31,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:31,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:31,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498838391] [2021-06-05 22:33:31,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:31,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:31,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:31,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:31,867 INFO L87 Difference]: Start difference. First operand 3625 states and 15171 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:32,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:32,554 INFO L93 Difference]: Finished difference Result 3860 states and 16055 transitions. [2021-06-05 22:33:32,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:33:32,554 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:32,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:32,560 INFO L225 Difference]: With dead ends: 3860 [2021-06-05 22:33:32,560 INFO L226 Difference]: Without dead ends: 3835 [2021-06-05 22:33:32,561 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 543.0ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:33:32,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3835 states. [2021-06-05 22:33:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3835 to 3629. [2021-06-05 22:33:32,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 3628 states have (on average 4.186052921719956) internal successors, (15187), 3628 states have internal predecessors, (15187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:32,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 15187 transitions. [2021-06-05 22:33:32,605 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 15187 transitions. Word has length 23 [2021-06-05 22:33:32,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:32,605 INFO L482 AbstractCegarLoop]: Abstraction has 3629 states and 15187 transitions. [2021-06-05 22:33:32,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 15187 transitions. [2021-06-05 22:33:32,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:32,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:32,610 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:32,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:32,810 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:32,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:32,810 INFO L82 PathProgramCache]: Analyzing trace with hash -161562021, now seen corresponding path program 86 times [2021-06-05 22:33:32,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:32,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811039198] [2021-06-05 22:33:32,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:32,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:32,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811039198] [2021-06-05 22:33:32,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811039198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:32,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405113717] [2021-06-05 22:33:32,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:32,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:32,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:32,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:32,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:33,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:33,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:33,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:33,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:33,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:33,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:33:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:33,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405113717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:33,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:33,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:33,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898496572] [2021-06-05 22:33:33,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:33,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:33,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:33,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:33,134 INFO L87 Difference]: Start difference. First operand 3629 states and 15187 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:33,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:33,690 INFO L93 Difference]: Finished difference Result 3848 states and 16015 transitions. [2021-06-05 22:33:33,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:33:33,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:33,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:33,697 INFO L225 Difference]: With dead ends: 3848 [2021-06-05 22:33:33,697 INFO L226 Difference]: Without dead ends: 3827 [2021-06-05 22:33:33,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 484.9ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:33:33,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2021-06-05 22:33:33,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 3621. [2021-06-05 22:33:33,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3621 states, 3620 states have (on average 4.185911602209945) internal successors, (15153), 3620 states have internal predecessors, (15153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:33,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3621 states to 3621 states and 15153 transitions. [2021-06-05 22:33:33,743 INFO L78 Accepts]: Start accepts. Automaton has 3621 states and 15153 transitions. Word has length 23 [2021-06-05 22:33:33,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:33,743 INFO L482 AbstractCegarLoop]: Abstraction has 3621 states and 15153 transitions. [2021-06-05 22:33:33,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:33,743 INFO L276 IsEmpty]: Start isEmpty. Operand 3621 states and 15153 transitions. [2021-06-05 22:33:33,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:33,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:33,748 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:33,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 22:33:33,948 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:33,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:33,948 INFO L82 PathProgramCache]: Analyzing trace with hash 119433831, now seen corresponding path program 87 times [2021-06-05 22:33:33,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:33,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798467469] [2021-06-05 22:33:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:34,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:34,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798467469] [2021-06-05 22:33:34,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798467469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:34,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796955411] [2021-06-05 22:33:34,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:34,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:33:34,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:34,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:34,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:34,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:34,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:34,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:34,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:34,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:34,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:33:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:34,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796955411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:34,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:34,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:34,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068328561] [2021-06-05 22:33:34,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:34,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:34,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:34,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:34,298 INFO L87 Difference]: Start difference. First operand 3621 states and 15153 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:34,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:34,878 INFO L93 Difference]: Finished difference Result 3860 states and 16065 transitions. [2021-06-05 22:33:34,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:33:34,879 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:34,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:34,885 INFO L225 Difference]: With dead ends: 3860 [2021-06-05 22:33:34,885 INFO L226 Difference]: Without dead ends: 3834 [2021-06-05 22:33:34,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 542.7ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:33:34,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2021-06-05 22:33:34,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3630. [2021-06-05 22:33:34,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3629 states have (on average 4.184348305318269) internal successors, (15185), 3629 states have internal predecessors, (15185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 15185 transitions. [2021-06-05 22:33:34,932 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 15185 transitions. Word has length 23 [2021-06-05 22:33:34,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:34,932 INFO L482 AbstractCegarLoop]: Abstraction has 3630 states and 15185 transitions. [2021-06-05 22:33:34,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 15185 transitions. [2021-06-05 22:33:34,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:34,937 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:34,937 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:35,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-05 22:33:35,138 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:35,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:35,138 INFO L82 PathProgramCache]: Analyzing trace with hash -922142237, now seen corresponding path program 88 times [2021-06-05 22:33:35,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:35,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98635305] [2021-06-05 22:33:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:35,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:35,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98635305] [2021-06-05 22:33:35,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98635305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:35,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52798094] [2021-06-05 22:33:35,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:35,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:35,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:35,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:35,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:35,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:35,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:35,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:35,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:35,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:35,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:33:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:35,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52798094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:35,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:35,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:35,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365149422] [2021-06-05 22:33:35,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:35,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:35,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:35,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:35,491 INFO L87 Difference]: Start difference. First operand 3630 states and 15185 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:36,125 INFO L93 Difference]: Finished difference Result 3920 states and 16297 transitions. [2021-06-05 22:33:36,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:33:36,125 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:36,132 INFO L225 Difference]: With dead ends: 3920 [2021-06-05 22:33:36,132 INFO L226 Difference]: Without dead ends: 3892 [2021-06-05 22:33:36,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 553.6ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:33:36,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3892 states. [2021-06-05 22:33:36,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3892 to 3623. [2021-06-05 22:33:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 4.185808945334069) internal successors, (15161), 3622 states have internal predecessors, (15161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 15161 transitions. [2021-06-05 22:33:36,179 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 15161 transitions. Word has length 23 [2021-06-05 22:33:36,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:36,179 INFO L482 AbstractCegarLoop]: Abstraction has 3623 states and 15161 transitions. [2021-06-05 22:33:36,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:36,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 15161 transitions. [2021-06-05 22:33:36,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:36,184 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:36,184 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:36,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:36,384 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:36,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:36,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1209263589, now seen corresponding path program 89 times [2021-06-05 22:33:36,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:36,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290073681] [2021-06-05 22:33:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:36,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:36,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290073681] [2021-06-05 22:33:36,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290073681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:36,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689688570] [2021-06-05 22:33:36,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:36,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:33:36,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:36,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:36,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:36,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:36,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:36,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:36,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:36,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:36,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:33:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:36,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689688570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:36,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:36,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:36,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844826321] [2021-06-05 22:33:36,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:36,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:36,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:36,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:36,742 INFO L87 Difference]: Start difference. First operand 3623 states and 15161 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:37,314 INFO L93 Difference]: Finished difference Result 3766 states and 15685 transitions. [2021-06-05 22:33:37,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:33:37,314 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:37,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:37,321 INFO L225 Difference]: With dead ends: 3766 [2021-06-05 22:33:37,321 INFO L226 Difference]: Without dead ends: 3740 [2021-06-05 22:33:37,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 583.5ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:33:37,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2021-06-05 22:33:37,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 3627. [2021-06-05 22:33:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 4.185603971318257) internal successors, (15177), 3626 states have internal predecessors, (15177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 15177 transitions. [2021-06-05 22:33:37,367 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 15177 transitions. Word has length 23 [2021-06-05 22:33:37,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:37,367 INFO L482 AbstractCegarLoop]: Abstraction has 3627 states and 15177 transitions. [2021-06-05 22:33:37,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:37,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 15177 transitions. [2021-06-05 22:33:37,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:37,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:37,373 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:37,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2021-06-05 22:33:37,573 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:37,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:37,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1702480975, now seen corresponding path program 90 times [2021-06-05 22:33:37,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:37,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125524312] [2021-06-05 22:33:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:37,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:37,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125524312] [2021-06-05 22:33:37,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125524312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:37,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609724621] [2021-06-05 22:33:37,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:37,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:33:37,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:37,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:37,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:37,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:37,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:37,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:37,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:37,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:37,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:33:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:37,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609724621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:37,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:37,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:37,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382634520] [2021-06-05 22:33:37,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:37,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:37,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:37,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:37,927 INFO L87 Difference]: Start difference. First operand 3627 states and 15177 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:38,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:38,552 INFO L93 Difference]: Finished difference Result 3816 states and 15891 transitions. [2021-06-05 22:33:38,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:33:38,552 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:38,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:38,559 INFO L225 Difference]: With dead ends: 3816 [2021-06-05 22:33:38,559 INFO L226 Difference]: Without dead ends: 3795 [2021-06-05 22:33:38,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 564.7ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:33:38,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2021-06-05 22:33:38,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 3623. [2021-06-05 22:33:38,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 4.185808945334069) internal successors, (15161), 3622 states have internal predecessors, (15161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:38,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 15161 transitions. [2021-06-05 22:33:38,605 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 15161 transitions. Word has length 23 [2021-06-05 22:33:38,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:38,605 INFO L482 AbstractCegarLoop]: Abstraction has 3623 states and 15161 transitions. [2021-06-05 22:33:38,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:38,605 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 15161 transitions. [2021-06-05 22:33:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:38,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:38,610 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:38,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-06-05 22:33:38,811 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:38,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:38,811 INFO L82 PathProgramCache]: Analyzing trace with hash -767704719, now seen corresponding path program 91 times [2021-06-05 22:33:38,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:38,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377564436] [2021-06-05 22:33:38,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:38,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:38,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377564436] [2021-06-05 22:33:38,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377564436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:38,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899630789] [2021-06-05 22:33:38,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:38,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:38,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:39,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:39,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:39,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:39,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:39,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:39,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:33:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:39,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899630789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:39,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:39,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:39,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484002245] [2021-06-05 22:33:39,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:39,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:39,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:39,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:39,158 INFO L87 Difference]: Start difference. First operand 3623 states and 15161 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:39,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:39,688 INFO L93 Difference]: Finished difference Result 3832 states and 15943 transitions. [2021-06-05 22:33:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:33:39,688 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:39,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:39,695 INFO L225 Difference]: With dead ends: 3832 [2021-06-05 22:33:39,695 INFO L226 Difference]: Without dead ends: 3807 [2021-06-05 22:33:39,695 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 543.8ms TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:33:39,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-06-05 22:33:39,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 3627. [2021-06-05 22:33:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 4.185603971318257) internal successors, (15177), 3626 states have internal predecessors, (15177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 15177 transitions. [2021-06-05 22:33:39,742 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 15177 transitions. Word has length 23 [2021-06-05 22:33:39,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:39,742 INFO L482 AbstractCegarLoop]: Abstraction has 3627 states and 15177 transitions. [2021-06-05 22:33:39,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:39,743 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 15177 transitions. [2021-06-05 22:33:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:39,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:39,748 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:39,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:39,948 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:39,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:39,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1780397251, now seen corresponding path program 92 times [2021-06-05 22:33:39,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:39,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845065985] [2021-06-05 22:33:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:40,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:40,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845065985] [2021-06-05 22:33:40,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845065985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:40,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701773752] [2021-06-05 22:33:40,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:40,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:40,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:40,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:40,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:40,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:40,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:40,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:40,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:40,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:40,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:33:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:40,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701773752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:40,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:40,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:40,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116092304] [2021-06-05 22:33:40,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:40,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:40,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:40,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:40,295 INFO L87 Difference]: Start difference. First operand 3627 states and 15177 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:40,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:40,741 INFO L93 Difference]: Finished difference Result 3820 states and 15903 transitions. [2021-06-05 22:33:40,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:33:40,742 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:40,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:40,748 INFO L225 Difference]: With dead ends: 3820 [2021-06-05 22:33:40,748 INFO L226 Difference]: Without dead ends: 3799 [2021-06-05 22:33:40,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 460.2ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:33:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3799 states. [2021-06-05 22:33:40,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3799 to 3619. [2021-06-05 22:33:40,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3619 states, 3618 states have (on average 4.185737976782753) internal successors, (15144), 3618 states have internal predecessors, (15144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3619 states to 3619 states and 15144 transitions. [2021-06-05 22:33:40,794 INFO L78 Accepts]: Start accepts. Automaton has 3619 states and 15144 transitions. Word has length 23 [2021-06-05 22:33:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:40,794 INFO L482 AbstractCegarLoop]: Abstraction has 3619 states and 15144 transitions. [2021-06-05 22:33:40,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 3619 states and 15144 transitions. [2021-06-05 22:33:40,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:40,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:40,799 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:40,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 22:33:41,000 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:41,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:41,000 INFO L82 PathProgramCache]: Analyzing trace with hash -37050447, now seen corresponding path program 93 times [2021-06-05 22:33:41,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:41,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771039187] [2021-06-05 22:33:41,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:41,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:41,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771039187] [2021-06-05 22:33:41,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771039187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:41,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412294848] [2021-06-05 22:33:41,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:41,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:33:41,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:41,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:41,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:41,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:41,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:41,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:41,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 34 [2021-06-05 22:33:41,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:41,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:41,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:41,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:31 [2021-06-05 22:33:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:41,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412294848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:41,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:41,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:41,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414183401] [2021-06-05 22:33:41,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:41,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:41,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:41,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:41,323 INFO L87 Difference]: Start difference. First operand 3619 states and 15144 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:41,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:41,762 INFO L93 Difference]: Finished difference Result 3845 states and 16010 transitions. [2021-06-05 22:33:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:33:41,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:41,769 INFO L225 Difference]: With dead ends: 3845 [2021-06-05 22:33:41,769 INFO L226 Difference]: Without dead ends: 3822 [2021-06-05 22:33:41,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 320.3ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:33:41,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-06-05 22:33:41,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3615. [2021-06-05 22:33:41,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3615 states, 3614 states have (on average 4.185943552850028) internal successors, (15128), 3614 states have internal predecessors, (15128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:41,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3615 states to 3615 states and 15128 transitions. [2021-06-05 22:33:41,813 INFO L78 Accepts]: Start accepts. Automaton has 3615 states and 15128 transitions. Word has length 23 [2021-06-05 22:33:41,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:41,813 INFO L482 AbstractCegarLoop]: Abstraction has 3615 states and 15128 transitions. [2021-06-05 22:33:41,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3615 states and 15128 transitions. [2021-06-05 22:33:41,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:41,818 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:41,818 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:42,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:42,024 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:42,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:42,024 INFO L82 PathProgramCache]: Analyzing trace with hash 634766705, now seen corresponding path program 94 times [2021-06-05 22:33:42,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:42,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58557676] [2021-06-05 22:33:42,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:42,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:42,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58557676] [2021-06-05 22:33:42,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58557676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:42,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093632984] [2021-06-05 22:33:42,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:42,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:42,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:42,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:42,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:42,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:42,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:33:42,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:42,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:42,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:42,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:33:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:42,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093632984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:42,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:42,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:42,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441704162] [2021-06-05 22:33:42,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:42,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:42,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:42,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:42,346 INFO L87 Difference]: Start difference. First operand 3615 states and 15128 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:42,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:42,930 INFO L93 Difference]: Finished difference Result 3905 states and 16247 transitions. [2021-06-05 22:33:42,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:33:42,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:42,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:42,937 INFO L225 Difference]: With dead ends: 3905 [2021-06-05 22:33:42,937 INFO L226 Difference]: Without dead ends: 3883 [2021-06-05 22:33:42,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 497.5ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:33:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3883 states. [2021-06-05 22:33:42,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3883 to 3623. [2021-06-05 22:33:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 4.1860850358917725) internal successors, (15162), 3622 states have internal predecessors, (15162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:42,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 15162 transitions. [2021-06-05 22:33:42,984 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 15162 transitions. Word has length 23 [2021-06-05 22:33:42,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:42,984 INFO L482 AbstractCegarLoop]: Abstraction has 3623 states and 15162 transitions. [2021-06-05 22:33:42,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:42,984 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 15162 transitions. [2021-06-05 22:33:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:42,989 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:42,989 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:43,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 22:33:43,189 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:43,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:43,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1148293557, now seen corresponding path program 95 times [2021-06-05 22:33:43,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:43,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884214283] [2021-06-05 22:33:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:43,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:43,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884214283] [2021-06-05 22:33:43,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884214283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:43,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866066785] [2021-06-05 22:33:43,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:43,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:33:43,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:43,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:43,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:43,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:43,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:43,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:43,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:43,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:43,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:33:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:43,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866066785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:43,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:43,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:43,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776487285] [2021-06-05 22:33:43,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:43,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:43,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:43,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:43,512 INFO L87 Difference]: Start difference. First operand 3623 states and 15162 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:44,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:44,278 INFO L93 Difference]: Finished difference Result 3907 states and 16243 transitions. [2021-06-05 22:33:44,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:33:44,278 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:44,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:44,285 INFO L225 Difference]: With dead ends: 3907 [2021-06-05 22:33:44,285 INFO L226 Difference]: Without dead ends: 3882 [2021-06-05 22:33:44,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 540.7ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:33:44,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2021-06-05 22:33:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3627. [2021-06-05 22:33:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 4.185879757308329) internal successors, (15178), 3626 states have internal predecessors, (15178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:44,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 15178 transitions. [2021-06-05 22:33:44,331 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 15178 transitions. Word has length 23 [2021-06-05 22:33:44,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:44,331 INFO L482 AbstractCegarLoop]: Abstraction has 3627 states and 15178 transitions. [2021-06-05 22:33:44,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:44,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 15178 transitions. [2021-06-05 22:33:44,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:44,336 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:44,336 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:44,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:44,536 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:44,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:44,536 INFO L82 PathProgramCache]: Analyzing trace with hash -2070962583, now seen corresponding path program 96 times [2021-06-05 22:33:44,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:44,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136286727] [2021-06-05 22:33:44,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:44,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:44,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136286727] [2021-06-05 22:33:44,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136286727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:44,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267584077] [2021-06-05 22:33:44,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:44,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:33:44,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:44,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:44,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:44,802 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 22:33:44,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 64 [2021-06-05 22:33:44,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:44,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:44,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:44,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:40 [2021-06-05 22:33:44,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:44,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267584077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:44,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:44,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:33:44,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328956408] [2021-06-05 22:33:44,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:33:44,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:44,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:33:44,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:33:44,887 INFO L87 Difference]: Start difference. First operand 3627 states and 15178 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:45,510 INFO L93 Difference]: Finished difference Result 3938 states and 16373 transitions. [2021-06-05 22:33:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:33:45,511 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:45,517 INFO L225 Difference]: With dead ends: 3938 [2021-06-05 22:33:45,517 INFO L226 Difference]: Without dead ends: 3917 [2021-06-05 22:33:45,518 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 532.0ms TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:33:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3917 states. [2021-06-05 22:33:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3917 to 3619. [2021-06-05 22:33:45,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3619 states, 3618 states have (on average 4.185737976782753) internal successors, (15144), 3618 states have internal predecessors, (15144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:45,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3619 states to 3619 states and 15144 transitions. [2021-06-05 22:33:45,564 INFO L78 Accepts]: Start accepts. Automaton has 3619 states and 15144 transitions. Word has length 23 [2021-06-05 22:33:45,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:45,564 INFO L482 AbstractCegarLoop]: Abstraction has 3619 states and 15144 transitions. [2021-06-05 22:33:45,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:45,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3619 states and 15144 transitions. [2021-06-05 22:33:45,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:45,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:45,569 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:45,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:45,777 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:45,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1900147651, now seen corresponding path program 97 times [2021-06-05 22:33:45,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:45,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628117502] [2021-06-05 22:33:45,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:45,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:45,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628117502] [2021-06-05 22:33:45,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628117502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:45,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139745649] [2021-06-05 22:33:45,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:45,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:45,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:46,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:46,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:33:46,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:46,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:46,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:46,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:33:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:46,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139745649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:46,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:46,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:46,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811642566] [2021-06-05 22:33:46,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:46,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:46,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:46,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:46,105 INFO L87 Difference]: Start difference. First operand 3619 states and 15144 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:46,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:46,528 INFO L93 Difference]: Finished difference Result 3845 states and 16010 transitions. [2021-06-05 22:33:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:33:46,529 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:46,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:46,535 INFO L225 Difference]: With dead ends: 3845 [2021-06-05 22:33:46,535 INFO L226 Difference]: Without dead ends: 3822 [2021-06-05 22:33:46,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 424.9ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:33:46,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-06-05 22:33:46,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3615. [2021-06-05 22:33:46,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3615 states, 3614 states have (on average 4.185943552850028) internal successors, (15128), 3614 states have internal predecessors, (15128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:46,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3615 states to 3615 states and 15128 transitions. [2021-06-05 22:33:46,581 INFO L78 Accepts]: Start accepts. Automaton has 3615 states and 15128 transitions. Word has length 23 [2021-06-05 22:33:46,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:46,581 INFO L482 AbstractCegarLoop]: Abstraction has 3615 states and 15128 transitions. [2021-06-05 22:33:46,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:46,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3615 states and 15128 transitions. [2021-06-05 22:33:46,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:46,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:46,586 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:46,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 22:33:46,786 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:46,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:46,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1294245051, now seen corresponding path program 35 times [2021-06-05 22:33:46,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:46,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909596738] [2021-06-05 22:33:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:46,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:46,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909596738] [2021-06-05 22:33:46,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909596738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:46,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334937982] [2021-06-05 22:33:46,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:46,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:33:46,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:46,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:46,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:47,018 INFO L354 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2021-06-05 22:33:47,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 22:33:47,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:47,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:47,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:47,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:29 [2021-06-05 22:33:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:47,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334937982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:47,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:47,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:47,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333633115] [2021-06-05 22:33:47,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:47,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:47,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:47,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:47,092 INFO L87 Difference]: Start difference. First operand 3615 states and 15128 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:47,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:47,853 INFO L93 Difference]: Finished difference Result 4559 states and 18845 transitions. [2021-06-05 22:33:47,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:33:47,854 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:47,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:47,862 INFO L225 Difference]: With dead ends: 4559 [2021-06-05 22:33:47,862 INFO L226 Difference]: Without dead ends: 4535 [2021-06-05 22:33:47,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 551.4ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:33:47,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4535 states. [2021-06-05 22:33:47,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4535 to 3639. [2021-06-05 22:33:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3638 states have (on average 4.188565145684442) internal successors, (15238), 3638 states have internal predecessors, (15238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 15238 transitions. [2021-06-05 22:33:47,914 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 15238 transitions. Word has length 23 [2021-06-05 22:33:47,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:47,914 INFO L482 AbstractCegarLoop]: Abstraction has 3639 states and 15238 transitions. [2021-06-05 22:33:47,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:47,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 15238 transitions. [2021-06-05 22:33:47,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:47,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:47,919 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:48,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:48,119 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:48,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:48,120 INFO L82 PathProgramCache]: Analyzing trace with hash 388084091, now seen corresponding path program 36 times [2021-06-05 22:33:48,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:48,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431909382] [2021-06-05 22:33:48,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:48,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:48,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431909382] [2021-06-05 22:33:48,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431909382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:48,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869917916] [2021-06-05 22:33:48,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:48,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:33:48,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:48,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:48,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:48,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:48,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:48,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:48,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:48,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:48,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:33:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:48,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869917916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:48,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:48,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:48,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554074755] [2021-06-05 22:33:48,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:48,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:48,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:48,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:48,413 INFO L87 Difference]: Start difference. First operand 3639 states and 15238 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:49,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:49,202 INFO L93 Difference]: Finished difference Result 4391 states and 18168 transitions. [2021-06-05 22:33:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:33:49,203 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:49,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:49,210 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 22:33:49,210 INFO L226 Difference]: Without dead ends: 4363 [2021-06-05 22:33:49,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 613.1ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:33:49,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-06-05 22:33:49,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3645. [2021-06-05 22:33:49,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3645 states, 3644 states have (on average 4.188254665203074) internal successors, (15262), 3644 states have internal predecessors, (15262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:49,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 15262 transitions. [2021-06-05 22:33:49,261 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 15262 transitions. Word has length 23 [2021-06-05 22:33:49,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:49,261 INFO L482 AbstractCegarLoop]: Abstraction has 3645 states and 15262 transitions. [2021-06-05 22:33:49,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:49,261 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 15262 transitions. [2021-06-05 22:33:49,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:49,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:49,266 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:49,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-05 22:33:49,466 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:49,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:49,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1463795247, now seen corresponding path program 37 times [2021-06-05 22:33:49,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:49,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38511166] [2021-06-05 22:33:49,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:49,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:49,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38511166] [2021-06-05 22:33:49,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38511166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:49,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085075181] [2021-06-05 22:33:49,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:49,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:49,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:49,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:49,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:49,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:49,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:49,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:49,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:33:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:49,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085075181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:49,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:49,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:49,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310842374] [2021-06-05 22:33:49,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:49,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:49,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:49,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:49,760 INFO L87 Difference]: Start difference. First operand 3645 states and 15262 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:50,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:50,531 INFO L93 Difference]: Finished difference Result 4372 states and 18083 transitions. [2021-06-05 22:33:50,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:33:50,532 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:50,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:50,539 INFO L225 Difference]: With dead ends: 4372 [2021-06-05 22:33:50,539 INFO L226 Difference]: Without dead ends: 4349 [2021-06-05 22:33:50,539 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 678.2ms TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:33:50,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2021-06-05 22:33:50,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 3639. [2021-06-05 22:33:50,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3638 states have (on average 4.188565145684442) internal successors, (15238), 3638 states have internal predecessors, (15238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:50,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 15238 transitions. [2021-06-05 22:33:50,589 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 15238 transitions. Word has length 23 [2021-06-05 22:33:50,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:50,589 INFO L482 AbstractCegarLoop]: Abstraction has 3639 states and 15238 transitions. [2021-06-05 22:33:50,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:50,590 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 15238 transitions. [2021-06-05 22:33:50,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:50,594 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:50,594 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:50,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:50,795 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:50,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:50,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1129036189, now seen corresponding path program 38 times [2021-06-05 22:33:50,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:50,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752681138] [2021-06-05 22:33:50,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:50,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:50,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752681138] [2021-06-05 22:33:50,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752681138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:50,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784245453] [2021-06-05 22:33:50,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:50,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:50,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:50,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:50,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:50,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:50,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:33:51,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:51,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:51,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:51,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:33:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:51,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784245453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:51,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:51,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:51,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265651716] [2021-06-05 22:33:51,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:51,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:51,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:51,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:51,073 INFO L87 Difference]: Start difference. First operand 3639 states and 15238 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:51,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:51,794 INFO L93 Difference]: Finished difference Result 4562 states and 18841 transitions. [2021-06-05 22:33:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:33:51,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:51,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:51,802 INFO L225 Difference]: With dead ends: 4562 [2021-06-05 22:33:51,802 INFO L226 Difference]: Without dead ends: 4531 [2021-06-05 22:33:51,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 506.0ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:33:51,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4531 states. [2021-06-05 22:33:51,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4531 to 3656. [2021-06-05 22:33:51,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 3655 states have (on average 4.191518467852257) internal successors, (15320), 3655 states have internal predecessors, (15320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:51,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 15320 transitions. [2021-06-05 22:33:51,852 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 15320 transitions. Word has length 23 [2021-06-05 22:33:51,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:51,852 INFO L482 AbstractCegarLoop]: Abstraction has 3656 states and 15320 transitions. [2021-06-05 22:33:51,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:51,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 15320 transitions. [2021-06-05 22:33:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:51,857 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:51,858 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:52,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:52,058 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:52,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:52,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1716781511, now seen corresponding path program 39 times [2021-06-05 22:33:52,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:52,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702289832] [2021-06-05 22:33:52,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:52,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:52,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702289832] [2021-06-05 22:33:52,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702289832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:52,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225827527] [2021-06-05 22:33:52,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:52,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:33:52,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:52,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:52,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:52,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:52,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:52,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:52,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:52,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:52,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:33:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:52,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225827527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:52,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:52,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:52,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048261107] [2021-06-05 22:33:52,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:52,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:52,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:52,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:52,349 INFO L87 Difference]: Start difference. First operand 3656 states and 15320 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:53,027 INFO L93 Difference]: Finished difference Result 4334 states and 17962 transitions. [2021-06-05 22:33:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:33:53,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:53,034 INFO L225 Difference]: With dead ends: 4334 [2021-06-05 22:33:53,034 INFO L226 Difference]: Without dead ends: 4306 [2021-06-05 22:33:53,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 581.0ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:33:53,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2021-06-05 22:33:53,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 3662. [2021-06-05 22:33:53,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3662 states, 3661 states have (on average 4.191204588910134) internal successors, (15344), 3661 states have internal predecessors, (15344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:53,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3662 states to 3662 states and 15344 transitions. [2021-06-05 22:33:53,083 INFO L78 Accepts]: Start accepts. Automaton has 3662 states and 15344 transitions. Word has length 23 [2021-06-05 22:33:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:53,083 INFO L482 AbstractCegarLoop]: Abstraction has 3662 states and 15344 transitions. [2021-06-05 22:33:53,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:53,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3662 states and 15344 transitions. [2021-06-05 22:33:53,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:53,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:53,088 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:53,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 22:33:53,288 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:53,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:53,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1502474629, now seen corresponding path program 40 times [2021-06-05 22:33:53,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:53,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101341540] [2021-06-05 22:33:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:53,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:53,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101341540] [2021-06-05 22:33:53,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101341540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:53,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008170810] [2021-06-05 22:33:53,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:53,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:53,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:53,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:53,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:53,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:53,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:53,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:53,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:53,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:53,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:33:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:53,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008170810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:53,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:53,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:53,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862532787] [2021-06-05 22:33:53,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:53,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:53,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:53,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:53,611 INFO L87 Difference]: Start difference. First operand 3662 states and 15344 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:54,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:54,422 INFO L93 Difference]: Finished difference Result 4322 states and 17901 transitions. [2021-06-05 22:33:54,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:33:54,423 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:54,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:54,430 INFO L225 Difference]: With dead ends: 4322 [2021-06-05 22:33:54,431 INFO L226 Difference]: Without dead ends: 4299 [2021-06-05 22:33:54,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 633.1ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:33:54,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4299 states. [2021-06-05 22:33:54,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4299 to 3656. [2021-06-05 22:33:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 3655 states have (on average 4.191518467852257) internal successors, (15320), 3655 states have internal predecessors, (15320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:54,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 15320 transitions. [2021-06-05 22:33:54,482 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 15320 transitions. Word has length 23 [2021-06-05 22:33:54,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:54,482 INFO L482 AbstractCegarLoop]: Abstraction has 3656 states and 15320 transitions. [2021-06-05 22:33:54,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:54,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 15320 transitions. [2021-06-05 22:33:54,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:54,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:54,487 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:54,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:54,687 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:54,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:54,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1120166395, now seen corresponding path program 41 times [2021-06-05 22:33:54,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:54,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824465561] [2021-06-05 22:33:54,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:54,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:54,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824465561] [2021-06-05 22:33:54,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824465561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:54,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161746073] [2021-06-05 22:33:54,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:54,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:33:54,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:54,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:54,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:54,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:54,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:33:54,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:54,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:54,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:54,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:33:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:54,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161746073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:54,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:54,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:54,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158534660] [2021-06-05 22:33:54,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:54,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:54,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:54,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:54,976 INFO L87 Difference]: Start difference. First operand 3656 states and 15320 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:55,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:55,600 INFO L93 Difference]: Finished difference Result 4199 states and 17420 transitions. [2021-06-05 22:33:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:33:55,601 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:55,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:55,608 INFO L225 Difference]: With dead ends: 4199 [2021-06-05 22:33:55,608 INFO L226 Difference]: Without dead ends: 4165 [2021-06-05 22:33:55,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 431.1ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:33:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-06-05 22:33:55,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 3677. [2021-06-05 22:33:55,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3677 states, 3676 states have (on average 4.1901523394994555) internal successors, (15403), 3676 states have internal predecessors, (15403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 15403 transitions. [2021-06-05 22:33:55,681 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 15403 transitions. Word has length 23 [2021-06-05 22:33:55,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:55,682 INFO L482 AbstractCegarLoop]: Abstraction has 3677 states and 15403 transitions. [2021-06-05 22:33:55,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:55,682 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 15403 transitions. [2021-06-05 22:33:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:55,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:55,686 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:55,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-05 22:33:55,887 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:55,887 INFO L82 PathProgramCache]: Analyzing trace with hash -208531025, now seen corresponding path program 42 times [2021-06-05 22:33:55,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:55,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859406408] [2021-06-05 22:33:55,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:55,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:55,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859406408] [2021-06-05 22:33:55,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859406408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:55,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486111298] [2021-06-05 22:33:55,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:56,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:33:56,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:56,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:56,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:56,121 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:33:56,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 22:33:56,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:33:56,142 INFO L628 ElimStorePlain]: treesize reduction 70, result has 16.7 percent of original size [2021-06-05 22:33:56,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:56,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 22:33:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:56,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486111298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:56,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:56,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:33:56,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213526119] [2021-06-05 22:33:56,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:33:56,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:56,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:33:56,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:33:56,181 INFO L87 Difference]: Start difference. First operand 3677 states and 15403 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:56,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:56,721 INFO L93 Difference]: Finished difference Result 4199 states and 17414 transitions. [2021-06-05 22:33:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:33:56,721 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:56,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:56,728 INFO L225 Difference]: With dead ends: 4199 [2021-06-05 22:33:56,729 INFO L226 Difference]: Without dead ends: 4168 [2021-06-05 22:33:56,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 377.9ms TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:33:56,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-06-05 22:33:56,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 3683. [2021-06-05 22:33:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3683 states, 3682 states have (on average 4.190928843020098) internal successors, (15431), 3682 states have internal predecessors, (15431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 15431 transitions. [2021-06-05 22:33:56,777 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 15431 transitions. Word has length 23 [2021-06-05 22:33:56,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:56,777 INFO L482 AbstractCegarLoop]: Abstraction has 3683 states and 15431 transitions. [2021-06-05 22:33:56,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 15431 transitions. [2021-06-05 22:33:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:56,782 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:56,783 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:56,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:56,983 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:56,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:56,983 INFO L82 PathProgramCache]: Analyzing trace with hash 379214297, now seen corresponding path program 43 times [2021-06-05 22:33:56,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:56,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949726290] [2021-06-05 22:33:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:57,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:57,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949726290] [2021-06-05 22:33:57,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949726290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:57,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030128617] [2021-06-05 22:33:57,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:57,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:57,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:57,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:57,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:57,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:57,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:57,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:57,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:33:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:57,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030128617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:57,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:57,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:57,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448661830] [2021-06-05 22:33:57,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:57,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:57,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:57,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:57,295 INFO L87 Difference]: Start difference. First operand 3683 states and 15431 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:57,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:57,893 INFO L93 Difference]: Finished difference Result 4103 states and 17052 transitions. [2021-06-05 22:33:57,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:33:57,894 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:57,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:57,901 INFO L225 Difference]: With dead ends: 4103 [2021-06-05 22:33:57,901 INFO L226 Difference]: Without dead ends: 4075 [2021-06-05 22:33:57,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 568.8ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:33:57,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4075 states. [2021-06-05 22:33:57,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4075 to 3689. [2021-06-05 22:33:57,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3689 states, 3688 states have (on average 4.190618221258134) internal successors, (15455), 3688 states have internal predecessors, (15455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3689 states to 3689 states and 15455 transitions. [2021-06-05 22:33:57,972 INFO L78 Accepts]: Start accepts. Automaton has 3689 states and 15455 transitions. Word has length 23 [2021-06-05 22:33:57,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:57,972 INFO L482 AbstractCegarLoop]: Abstraction has 3689 states and 15455 transitions. [2021-06-05 22:33:57,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 3689 states and 15455 transitions. [2021-06-05 22:33:57,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:57,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:57,977 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:58,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-06-05 22:33:58,178 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:58,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:58,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1454925453, now seen corresponding path program 44 times [2021-06-05 22:33:58,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:58,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739039841] [2021-06-05 22:33:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:58,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:58,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739039841] [2021-06-05 22:33:58,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739039841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:58,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545601466] [2021-06-05 22:33:58,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:58,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:58,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:58,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:58,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:58,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:58,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:33:58,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:58,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:58,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:58,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:33:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:58,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545601466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:58,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:58,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:33:58,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083742796] [2021-06-05 22:33:58,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:58,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:58,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:58,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:58,479 INFO L87 Difference]: Start difference. First operand 3689 states and 15455 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:59,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:59,211 INFO L93 Difference]: Finished difference Result 4219 states and 17490 transitions. [2021-06-05 22:33:59,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:33:59,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:33:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:59,219 INFO L225 Difference]: With dead ends: 4219 [2021-06-05 22:33:59,219 INFO L226 Difference]: Without dead ends: 4196 [2021-06-05 22:33:59,219 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 675.8ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:33:59,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2021-06-05 22:33:59,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 3677. [2021-06-05 22:33:59,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3677 states, 3676 states have (on average 4.1901523394994555) internal successors, (15403), 3676 states have internal predecessors, (15403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:59,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 15403 transitions. [2021-06-05 22:33:59,267 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 15403 transitions. Word has length 23 [2021-06-05 22:33:59,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:59,267 INFO L482 AbstractCegarLoop]: Abstraction has 3677 states and 15403 transitions. [2021-06-05 22:33:59,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:59,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 15403 transitions. [2021-06-05 22:33:59,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:33:59,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:59,272 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:59,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 22:33:59,473 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:59,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:59,473 INFO L82 PathProgramCache]: Analyzing trace with hash 210561437, now seen corresponding path program 45 times [2021-06-05 22:33:59,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:59,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598040274] [2021-06-05 22:33:59,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:59,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:59,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598040274] [2021-06-05 22:33:59,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598040274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:59,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086958659] [2021-06-05 22:33:59,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:59,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:33:59,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:59,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:33:59,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:59,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:59,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2021-06-05 22:33:59,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:59,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:59,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:59,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:50 [2021-06-05 22:33:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:59,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086958659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:59,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:59,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:33:59,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767423640] [2021-06-05 22:33:59,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:33:59,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:59,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:33:59,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:33:59,832 INFO L87 Difference]: Start difference. First operand 3677 states and 15403 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:00,497 INFO L93 Difference]: Finished difference Result 4112 states and 17055 transitions. [2021-06-05 22:34:00,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:34:00,497 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:00,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:00,504 INFO L225 Difference]: With dead ends: 4112 [2021-06-05 22:34:00,505 INFO L226 Difference]: Without dead ends: 4103 [2021-06-05 22:34:00,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 564.1ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:34:00,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states. [2021-06-05 22:34:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 3733. [2021-06-05 22:34:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3732 states have (on average 4.193461950696677) internal successors, (15650), 3732 states have internal predecessors, (15650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:00,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 15650 transitions. [2021-06-05 22:34:00,556 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 15650 transitions. Word has length 23 [2021-06-05 22:34:00,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:00,556 INFO L482 AbstractCegarLoop]: Abstraction has 3733 states and 15650 transitions. [2021-06-05 22:34:00,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:00,556 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 15650 transitions. [2021-06-05 22:34:00,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:00,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:00,562 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:00,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:00,762 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:00,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:00,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1901867193, now seen corresponding path program 46 times [2021-06-05 22:34:00,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:00,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821011604] [2021-06-05 22:34:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:00,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:00,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821011604] [2021-06-05 22:34:00,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821011604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:00,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815488716] [2021-06-05 22:34:00,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:00,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:00,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:00,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:00,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:00,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:00,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2021-06-05 22:34:00,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:00,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:00,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:00,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:50 [2021-06-05 22:34:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:01,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815488716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:01,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:01,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:34:01,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210365687] [2021-06-05 22:34:01,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:34:01,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:01,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:34:01,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:34:01,091 INFO L87 Difference]: Start difference. First operand 3733 states and 15650 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:01,872 INFO L93 Difference]: Finished difference Result 4327 states and 17952 transitions. [2021-06-05 22:34:01,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:34:01,872 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:01,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:01,880 INFO L225 Difference]: With dead ends: 4327 [2021-06-05 22:34:01,880 INFO L226 Difference]: Without dead ends: 4318 [2021-06-05 22:34:01,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 663.4ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:34:01,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4318 states. [2021-06-05 22:34:01,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4318 to 3739. [2021-06-05 22:34:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 4.193151417870519) internal successors, (15674), 3738 states have internal predecessors, (15674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 15674 transitions. [2021-06-05 22:34:01,931 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 15674 transitions. Word has length 23 [2021-06-05 22:34:01,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:01,931 INFO L482 AbstractCegarLoop]: Abstraction has 3739 states and 15674 transitions. [2021-06-05 22:34:01,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:01,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 15674 transitions. [2021-06-05 22:34:01,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:01,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:01,936 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:02,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:02,137 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:02,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:02,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1064402683, now seen corresponding path program 47 times [2021-06-05 22:34:02,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:02,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586176253] [2021-06-05 22:34:02,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:02,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:02,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586176253] [2021-06-05 22:34:02,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586176253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:02,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925000053] [2021-06-05 22:34:02,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:02,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:34:02,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:02,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:02,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:02,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:02,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2021-06-05 22:34:02,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:02,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:02,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:02,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:50 [2021-06-05 22:34:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:02,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925000053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:02,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:02,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:34:02,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589500675] [2021-06-05 22:34:02,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:34:02,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:02,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:34:02,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:34:02,478 INFO L87 Difference]: Start difference. First operand 3739 states and 15674 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:03,305 INFO L93 Difference]: Finished difference Result 4413 states and 18287 transitions. [2021-06-05 22:34:03,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:34:03,305 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:03,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:03,313 INFO L225 Difference]: With dead ends: 4413 [2021-06-05 22:34:03,313 INFO L226 Difference]: Without dead ends: 4404 [2021-06-05 22:34:03,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 729.3ms TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:34:03,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-06-05 22:34:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 3745. [2021-06-05 22:34:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3745 states, 3744 states have (on average 4.193910256410256) internal successors, (15702), 3744 states have internal predecessors, (15702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:03,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3745 states to 3745 states and 15702 transitions. [2021-06-05 22:34:03,368 INFO L78 Accepts]: Start accepts. Automaton has 3745 states and 15702 transitions. Word has length 23 [2021-06-05 22:34:03,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:03,368 INFO L482 AbstractCegarLoop]: Abstraction has 3745 states and 15702 transitions. [2021-06-05 22:34:03,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:03,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3745 states and 15702 transitions. [2021-06-05 22:34:03,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:03,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:03,374 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:03,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 22:34:03,574 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:03,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:03,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1652148005, now seen corresponding path program 48 times [2021-06-05 22:34:03,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:03,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82777564] [2021-06-05 22:34:03,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:03,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:03,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82777564] [2021-06-05 22:34:03,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82777564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:03,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182950589] [2021-06-05 22:34:03,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:03,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:34:03,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:03,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:34:03,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:03,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:03,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 22:34:03,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:03,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:03,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:03,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:26 [2021-06-05 22:34:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:03,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182950589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:03,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:03,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:34:03,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686894310] [2021-06-05 22:34:03,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:34:03,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:03,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:34:03,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:34:03,850 INFO L87 Difference]: Start difference. First operand 3745 states and 15702 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:04,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:04,417 INFO L93 Difference]: Finished difference Result 4073 states and 16946 transitions. [2021-06-05 22:34:04,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:34:04,417 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:04,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:04,424 INFO L225 Difference]: With dead ends: 4073 [2021-06-05 22:34:04,424 INFO L226 Difference]: Without dead ends: 4064 [2021-06-05 22:34:04,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 420.1ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:34:04,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2021-06-05 22:34:04,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 3751. [2021-06-05 22:34:04,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3751 states, 3750 states have (on average 4.1936) internal successors, (15726), 3750 states have internal predecessors, (15726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:04,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3751 states to 3751 states and 15726 transitions. [2021-06-05 22:34:04,475 INFO L78 Accepts]: Start accepts. Automaton has 3751 states and 15726 transitions. Word has length 23 [2021-06-05 22:34:04,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:04,475 INFO L482 AbstractCegarLoop]: Abstraction has 3751 states and 15726 transitions. [2021-06-05 22:34:04,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:04,476 INFO L276 IsEmpty]: Start isEmpty. Operand 3751 states and 15726 transitions. [2021-06-05 22:34:04,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:04,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:04,481 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:04,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable484 [2021-06-05 22:34:04,681 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:04,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:04,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1567108135, now seen corresponding path program 49 times [2021-06-05 22:34:04,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:04,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162485618] [2021-06-05 22:34:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:04,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:04,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162485618] [2021-06-05 22:34:04,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162485618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:04,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745668591] [2021-06-05 22:34:04,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:04,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:04,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:04,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:04,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 40 [2021-06-05 22:34:04,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:04,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:04,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:04,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:31 [2021-06-05 22:34:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:05,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745668591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:05,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:05,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:34:05,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558501607] [2021-06-05 22:34:05,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:34:05,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:05,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:34:05,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:34:05,052 INFO L87 Difference]: Start difference. First operand 3751 states and 15726 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:05,320 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-05 22:34:05,967 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-06-05 22:34:06,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:06,201 INFO L93 Difference]: Finished difference Result 4206 states and 17475 transitions. [2021-06-05 22:34:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:34:06,201 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:06,209 INFO L225 Difference]: With dead ends: 4206 [2021-06-05 22:34:06,209 INFO L226 Difference]: Without dead ends: 4195 [2021-06-05 22:34:06,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1006.0ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:34:06,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-06-05 22:34:06,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 3759. [2021-06-05 22:34:06,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 4.193720063863758) internal successors, (15760), 3758 states have internal predecessors, (15760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:06,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 15760 transitions. [2021-06-05 22:34:06,258 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 15760 transitions. Word has length 23 [2021-06-05 22:34:06,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:06,258 INFO L482 AbstractCegarLoop]: Abstraction has 3759 states and 15760 transitions. [2021-06-05 22:34:06,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:06,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 15760 transitions. [2021-06-05 22:34:06,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:06,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:06,263 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:06,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-05 22:34:06,464 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:06,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:06,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1525104667, now seen corresponding path program 50 times [2021-06-05 22:34:06,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:06,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603667282] [2021-06-05 22:34:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:06,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:06,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603667282] [2021-06-05 22:34:06,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603667282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:06,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329084717] [2021-06-05 22:34:06,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:06,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:06,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:06,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:06,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:06,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:06,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:34:06,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:06,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:06,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:06,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:34:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:06,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329084717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:06,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:06,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:06,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143919492] [2021-06-05 22:34:06,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:06,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:06,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:06,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:06,760 INFO L87 Difference]: Start difference. First operand 3759 states and 15760 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:07,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:07,697 INFO L93 Difference]: Finished difference Result 4690 states and 19442 transitions. [2021-06-05 22:34:07,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:34:07,697 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:07,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:07,705 INFO L225 Difference]: With dead ends: 4690 [2021-06-05 22:34:07,706 INFO L226 Difference]: Without dead ends: 4666 [2021-06-05 22:34:07,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 695.3ms TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:34:07,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2021-06-05 22:34:07,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 3783. [2021-06-05 22:34:07,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.195928080380751) internal successors, (15869), 3782 states have internal predecessors, (15869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:07,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15869 transitions. [2021-06-05 22:34:07,759 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15869 transitions. Word has length 23 [2021-06-05 22:34:07,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:07,759 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15869 transitions. [2021-06-05 22:34:07,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:07,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15869 transitions. [2021-06-05 22:34:07,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:07,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:07,765 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:07,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:07,965 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:07,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:07,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1863701669, now seen corresponding path program 51 times [2021-06-05 22:34:07,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:07,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332400473] [2021-06-05 22:34:07,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:08,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:08,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332400473] [2021-06-05 22:34:08,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332400473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:08,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24860796] [2021-06-05 22:34:08,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:08,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:34:08,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:08,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:34:08,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:08,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:08,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:34:08,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:08,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 35 [2021-06-05 22:34:08,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:08,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:08,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:08,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:34:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:08,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24860796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:08,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:08,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:08,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943777983] [2021-06-05 22:34:08,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:08,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:08,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:08,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:08,260 INFO L87 Difference]: Start difference. First operand 3783 states and 15869 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:08,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:08,826 INFO L93 Difference]: Finished difference Result 4448 states and 18449 transitions. [2021-06-05 22:34:08,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:34:08,827 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:08,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:08,835 INFO L225 Difference]: With dead ends: 4448 [2021-06-05 22:34:08,835 INFO L226 Difference]: Without dead ends: 4420 [2021-06-05 22:34:08,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 419.0ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:34:08,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4420 states. [2021-06-05 22:34:08,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4420 to 3789. [2021-06-05 22:34:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.195617740232312) internal successors, (15893), 3788 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15893 transitions. [2021-06-05 22:34:08,887 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15893 transitions. Word has length 23 [2021-06-05 22:34:08,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:08,887 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15893 transitions. [2021-06-05 22:34:08,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:08,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15893 transitions. [2021-06-05 22:34:08,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:08,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:08,893 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:09,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:09,093 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:09,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:09,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1355554471, now seen corresponding path program 52 times [2021-06-05 22:34:09,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:09,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565035461] [2021-06-05 22:34:09,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:09,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:09,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565035461] [2021-06-05 22:34:09,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565035461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:09,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782338623] [2021-06-05 22:34:09,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:09,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:09,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:09,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:09,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:09,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:09,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:09,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:09,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:09,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:09,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:34:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:09,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782338623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:09,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:09,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:09,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567065255] [2021-06-05 22:34:09,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:09,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:09,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:09,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:09,399 INFO L87 Difference]: Start difference. First operand 3789 states and 15893 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:10,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:10,400 INFO L93 Difference]: Finished difference Result 4477 states and 18578 transitions. [2021-06-05 22:34:10,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:34:10,400 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:10,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:10,408 INFO L225 Difference]: With dead ends: 4477 [2021-06-05 22:34:10,409 INFO L226 Difference]: Without dead ends: 4454 [2021-06-05 22:34:10,409 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 835.4ms TimeCoverageRelationStatistics Valid=249, Invalid=941, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:34:10,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4454 states. [2021-06-05 22:34:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4454 to 3777. [2021-06-05 22:34:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3776 states have (on average 4.195444915254237) internal successors, (15842), 3776 states have internal predecessors, (15842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 15842 transitions. [2021-06-05 22:34:10,462 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 15842 transitions. Word has length 23 [2021-06-05 22:34:10,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:10,462 INFO L482 AbstractCegarLoop]: Abstraction has 3777 states and 15842 transitions. [2021-06-05 22:34:10,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:10,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 15842 transitions. [2021-06-05 22:34:10,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:10,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:10,467 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:10,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:10,668 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:10,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:10,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1690313529, now seen corresponding path program 53 times [2021-06-05 22:34:10,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:10,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663290355] [2021-06-05 22:34:10,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:10,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:10,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663290355] [2021-06-05 22:34:10,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663290355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:10,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805675017] [2021-06-05 22:34:10,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:10,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:34:10,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:10,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:10,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:10,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:10,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:34:10,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:10,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:10,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:10,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:34:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:10,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805675017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:10,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:10,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:10,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647789073] [2021-06-05 22:34:10,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:10,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:10,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:10,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:10,965 INFO L87 Difference]: Start difference. First operand 3777 states and 15842 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:11,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:11,575 INFO L93 Difference]: Finished difference Result 4607 states and 19073 transitions. [2021-06-05 22:34:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:34:11,576 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:11,584 INFO L225 Difference]: With dead ends: 4607 [2021-06-05 22:34:11,584 INFO L226 Difference]: Without dead ends: 4576 [2021-06-05 22:34:11,584 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 438.8ms TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:34:11,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4576 states. [2021-06-05 22:34:11,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4576 to 3783. [2021-06-05 22:34:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.196192490745637) internal successors, (15870), 3782 states have internal predecessors, (15870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15870 transitions. [2021-06-05 22:34:11,636 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15870 transitions. Word has length 23 [2021-06-05 22:34:11,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:11,636 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15870 transitions. [2021-06-05 22:34:11,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15870 transitions. [2021-06-05 22:34:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:11,641 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:11,641 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:11,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable497,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:11,841 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:11,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:11,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1102568207, now seen corresponding path program 54 times [2021-06-05 22:34:11,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:11,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525250737] [2021-06-05 22:34:11,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:11,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:11,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525250737] [2021-06-05 22:34:11,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525250737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:11,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267379631] [2021-06-05 22:34:11,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:11,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:34:11,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:11,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:11,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:12,095 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 22:34:12,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 64 [2021-06-05 22:34:12,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:12,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:12,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:12,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:48 [2021-06-05 22:34:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:12,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267379631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:12,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:12,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:34:12,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877118982] [2021-06-05 22:34:12,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:34:12,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:12,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:34:12,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:34:12,216 INFO L87 Difference]: Start difference. First operand 3783 states and 15870 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:13,064 INFO L93 Difference]: Finished difference Result 4287 states and 17822 transitions. [2021-06-05 22:34:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:34:13,064 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:13,072 INFO L225 Difference]: With dead ends: 4287 [2021-06-05 22:34:13,072 INFO L226 Difference]: Without dead ends: 4259 [2021-06-05 22:34:13,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 611.5ms TimeCoverageRelationStatistics Valid=206, Invalid=1126, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:34:13,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4259 states. [2021-06-05 22:34:13,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4259 to 3789. [2021-06-05 22:34:13,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.195881731784583) internal successors, (15894), 3788 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15894 transitions. [2021-06-05 22:34:13,126 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15894 transitions. Word has length 23 [2021-06-05 22:34:13,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:13,126 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15894 transitions. [2021-06-05 22:34:13,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:13,126 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15894 transitions. [2021-06-05 22:34:13,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:13,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:13,131 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:13,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 22:34:13,333 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:13,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:13,333 INFO L82 PathProgramCache]: Analyzing trace with hash -26857051, now seen corresponding path program 55 times [2021-06-05 22:34:13,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:13,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389396725] [2021-06-05 22:34:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:13,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:13,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389396725] [2021-06-05 22:34:13,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389396725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:13,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421542760] [2021-06-05 22:34:13,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:13,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:13,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:13,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:13,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:13,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:13,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:13,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:13,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:34:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:13,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421542760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:13,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:13,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:13,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709911971] [2021-06-05 22:34:13,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:13,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:13,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:13,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:13,631 INFO L87 Difference]: Start difference. First operand 3789 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:14,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:14,449 INFO L93 Difference]: Finished difference Result 4408 states and 18310 transitions. [2021-06-05 22:34:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:34:14,449 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:14,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:14,457 INFO L225 Difference]: With dead ends: 4408 [2021-06-05 22:34:14,457 INFO L226 Difference]: Without dead ends: 4385 [2021-06-05 22:34:14,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 721.5ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:34:14,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4385 states. [2021-06-05 22:34:14,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4385 to 3771. [2021-06-05 22:34:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3771 states, 3770 states have (on average 4.1938992042440315) internal successors, (15811), 3770 states have internal predecessors, (15811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:14,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3771 states to 3771 states and 15811 transitions. [2021-06-05 22:34:14,526 INFO L78 Accepts]: Start accepts. Automaton has 3771 states and 15811 transitions. Word has length 23 [2021-06-05 22:34:14,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:14,526 INFO L482 AbstractCegarLoop]: Abstraction has 3771 states and 15811 transitions. [2021-06-05 22:34:14,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:14,527 INFO L276 IsEmpty]: Start isEmpty. Operand 3771 states and 15811 transitions. [2021-06-05 22:34:14,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:14,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:14,532 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:14,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:14,732 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:14,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:14,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1699183323, now seen corresponding path program 56 times [2021-06-05 22:34:14,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:14,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614418938] [2021-06-05 22:34:14,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:14,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:14,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614418938] [2021-06-05 22:34:14,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614418938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:14,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143690602] [2021-06-05 22:34:14,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:14,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:14,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:14,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:14,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:14,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:14,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:34:14,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:14,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:14,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:14,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:34:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:15,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143690602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:15,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:15,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:15,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973686834] [2021-06-05 22:34:15,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:15,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:15,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:15,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:15,029 INFO L87 Difference]: Start difference. First operand 3771 states and 15811 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:15,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:15,402 INFO L93 Difference]: Finished difference Result 4227 states and 17567 transitions. [2021-06-05 22:34:15,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:34:15,402 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:15,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:15,410 INFO L225 Difference]: With dead ends: 4227 [2021-06-05 22:34:15,410 INFO L226 Difference]: Without dead ends: 4193 [2021-06-05 22:34:15,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:34:15,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-06-05 22:34:15,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 3777. [2021-06-05 22:34:15,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3776 states have (on average 4.193591101694915) internal successors, (15835), 3776 states have internal predecessors, (15835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 15835 transitions. [2021-06-05 22:34:15,463 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 15835 transitions. Word has length 23 [2021-06-05 22:34:15,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:15,463 INFO L482 AbstractCegarLoop]: Abstraction has 3777 states and 15835 transitions. [2021-06-05 22:34:15,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:15,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 15835 transitions. [2021-06-05 22:34:15,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:15,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:15,469 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:15,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:15,669 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:15,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:15,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1267086553, now seen corresponding path program 57 times [2021-06-05 22:34:15,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:15,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850291792] [2021-06-05 22:34:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:15,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:15,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850291792] [2021-06-05 22:34:15,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850291792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:15,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720551912] [2021-06-05 22:34:15,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:15,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:34:15,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:15,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:34:15,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:15,933 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:34:15,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 22:34:15,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:34:15,956 INFO L628 ElimStorePlain]: treesize reduction 53, result has 20.9 percent of original size [2021-06-05 22:34:15,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:15,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 22:34:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:16,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720551912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:16,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:16,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:34:16,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91345384] [2021-06-05 22:34:16,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:34:16,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:16,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:34:16,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:34:16,003 INFO L87 Difference]: Start difference. First operand 3777 states and 15835 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:16,666 INFO L93 Difference]: Finished difference Result 4426 states and 18356 transitions. [2021-06-05 22:34:16,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:34:16,666 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:16,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:16,674 INFO L225 Difference]: With dead ends: 4426 [2021-06-05 22:34:16,675 INFO L226 Difference]: Without dead ends: 4395 [2021-06-05 22:34:16,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 470.7ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:34:16,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4395 states. [2021-06-05 22:34:16,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4395 to 3783. [2021-06-05 22:34:16,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.194341618191433) internal successors, (15863), 3782 states have internal predecessors, (15863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:16,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15863 transitions. [2021-06-05 22:34:16,748 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15863 transitions. Word has length 23 [2021-06-05 22:34:16,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:16,748 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15863 transitions. [2021-06-05 22:34:16,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:16,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15863 transitions. [2021-06-05 22:34:16,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:16,753 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:16,753 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:16,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-06-05 22:34:16,954 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:16,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:16,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1854831875, now seen corresponding path program 58 times [2021-06-05 22:34:16,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:16,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013374408] [2021-06-05 22:34:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:17,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:17,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013374408] [2021-06-05 22:34:17,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013374408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:17,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046992564] [2021-06-05 22:34:17,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:17,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:17,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:17,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:17,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:17,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:17,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:17,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:17,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:17,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:17,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:34:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:17,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046992564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:17,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:17,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:17,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579695498] [2021-06-05 22:34:17,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:17,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:17,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:17,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:17,253 INFO L87 Difference]: Start difference. First operand 3783 states and 15863 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:17,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:17,870 INFO L93 Difference]: Finished difference Result 4228 states and 17591 transitions. [2021-06-05 22:34:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:34:17,871 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:17,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:17,878 INFO L225 Difference]: With dead ends: 4228 [2021-06-05 22:34:17,878 INFO L226 Difference]: Without dead ends: 4200 [2021-06-05 22:34:17,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 521.3ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:34:17,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2021-06-05 22:34:17,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 3789. [2021-06-05 22:34:17,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.194033790918691) internal successors, (15887), 3788 states have internal predecessors, (15887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:17,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15887 transitions. [2021-06-05 22:34:17,930 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15887 transitions. Word has length 23 [2021-06-05 22:34:17,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:17,930 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15887 transitions. [2021-06-05 22:34:17,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:17,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15887 transitions. [2021-06-05 22:34:17,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:17,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:17,936 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:18,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:18,136 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:18,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:18,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1364424265, now seen corresponding path program 59 times [2021-06-05 22:34:18,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:18,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142528391] [2021-06-05 22:34:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:18,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:18,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142528391] [2021-06-05 22:34:18,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142528391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:18,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017007646] [2021-06-05 22:34:18,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:18,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:34:18,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:18,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:18,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:18,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:18,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:18,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:18,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:18,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:18,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:34:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:18,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017007646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:18,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:18,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:18,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951562823] [2021-06-05 22:34:18,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:18,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:18,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:18,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:18,441 INFO L87 Difference]: Start difference. First operand 3789 states and 15887 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:19,178 INFO L93 Difference]: Finished difference Result 4302 states and 17890 transitions. [2021-06-05 22:34:19,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:34:19,179 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:19,186 INFO L225 Difference]: With dead ends: 4302 [2021-06-05 22:34:19,186 INFO L226 Difference]: Without dead ends: 4279 [2021-06-05 22:34:19,186 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 718.2ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:34:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4279 states. [2021-06-05 22:34:19,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4279 to 3765. [2021-06-05 22:34:19,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3765 states, 3764 states have (on average 4.193411264612115) internal successors, (15784), 3764 states have internal predecessors, (15784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:19,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3765 states to 3765 states and 15784 transitions. [2021-06-05 22:34:19,236 INFO L78 Accepts]: Start accepts. Automaton has 3765 states and 15784 transitions. Word has length 23 [2021-06-05 22:34:19,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:19,236 INFO L482 AbstractCegarLoop]: Abstraction has 3765 states and 15784 transitions. [2021-06-05 22:34:19,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:19,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3765 states and 15784 transitions. [2021-06-05 22:34:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:19,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:19,241 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:19,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:19,441 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:19,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:19,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1496928921, now seen corresponding path program 60 times [2021-06-05 22:34:19,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:19,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223444111] [2021-06-05 22:34:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:19,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:19,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223444111] [2021-06-05 22:34:19,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223444111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:19,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013819209] [2021-06-05 22:34:19,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:19,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:34:19,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:19,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:19,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:19,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:19,687 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:34:19,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 52 [2021-06-05 22:34:19,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:34:19,704 INFO L628 ElimStorePlain]: treesize reduction 39, result has 26.4 percent of original size [2021-06-05 22:34:19,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:19,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:14 [2021-06-05 22:34:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:19,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013819209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:19,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:19,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:34:19,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079183688] [2021-06-05 22:34:19,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:34:19,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:19,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:34:19,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:34:19,741 INFO L87 Difference]: Start difference. First operand 3765 states and 15784 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:20,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:20,590 INFO L93 Difference]: Finished difference Result 4660 states and 19308 transitions. [2021-06-05 22:34:20,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:34:20,590 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:20,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:20,599 INFO L225 Difference]: With dead ends: 4660 [2021-06-05 22:34:20,599 INFO L226 Difference]: Without dead ends: 4636 [2021-06-05 22:34:20,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 523.8ms TimeCoverageRelationStatistics Valid=209, Invalid=1431, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:34:20,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2021-06-05 22:34:20,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 3783. [2021-06-05 22:34:20,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.196192490745637) internal successors, (15870), 3782 states have internal predecessors, (15870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:20,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15870 transitions. [2021-06-05 22:34:20,656 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15870 transitions. Word has length 23 [2021-06-05 22:34:20,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:20,656 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15870 transitions. [2021-06-05 22:34:20,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:20,656 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15870 transitions. [2021-06-05 22:34:20,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:20,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:20,661 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:20,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable515 [2021-06-05 22:34:20,862 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:20,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:20,862 INFO L82 PathProgramCache]: Analyzing trace with hash 590767961, now seen corresponding path program 61 times [2021-06-05 22:34:20,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:20,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067539384] [2021-06-05 22:34:20,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:20,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:20,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067539384] [2021-06-05 22:34:20,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067539384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:20,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496194483] [2021-06-05 22:34:20,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:20,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:20,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:21,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:21,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:21,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:21,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:21,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:21,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:34:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:21,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496194483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:21,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:21,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:21,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13408254] [2021-06-05 22:34:21,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:21,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:21,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:21,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:21,158 INFO L87 Difference]: Start difference. First operand 3783 states and 15870 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:21,871 INFO L93 Difference]: Finished difference Result 4546 states and 18846 transitions. [2021-06-05 22:34:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:34:21,871 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:21,879 INFO L225 Difference]: With dead ends: 4546 [2021-06-05 22:34:21,879 INFO L226 Difference]: Without dead ends: 4518 [2021-06-05 22:34:21,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 617.5ms TimeCoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:34:21,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2021-06-05 22:34:21,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 3789. [2021-06-05 22:34:21,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.195881731784583) internal successors, (15894), 3788 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:21,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15894 transitions. [2021-06-05 22:34:21,930 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15894 transitions. Word has length 23 [2021-06-05 22:34:21,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:21,930 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15894 transitions. [2021-06-05 22:34:21,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:21,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15894 transitions. [2021-06-05 22:34:21,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:21,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:21,935 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:22,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:22,135 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:22,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:22,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1666479117, now seen corresponding path program 62 times [2021-06-05 22:34:22,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:22,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425844664] [2021-06-05 22:34:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:22,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:22,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425844664] [2021-06-05 22:34:22,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425844664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:22,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673956481] [2021-06-05 22:34:22,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:22,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:22,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:22,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:22,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:22,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:22,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:22,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:22,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:22,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:22,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:34:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:22,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673956481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:22,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:22,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:22,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653772350] [2021-06-05 22:34:22,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:22,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:22,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:22,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:22,430 INFO L87 Difference]: Start difference. First operand 3789 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:23,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:23,372 INFO L93 Difference]: Finished difference Result 4455 states and 18490 transitions. [2021-06-05 22:34:23,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:34:23,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:23,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:23,380 INFO L225 Difference]: With dead ends: 4455 [2021-06-05 22:34:23,380 INFO L226 Difference]: Without dead ends: 4432 [2021-06-05 22:34:23,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 729.5ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:34:23,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4432 states. [2021-06-05 22:34:23,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4432 to 3777. [2021-06-05 22:34:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3776 states have (on average 4.195709745762712) internal successors, (15843), 3776 states have internal predecessors, (15843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:23,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 15843 transitions. [2021-06-05 22:34:23,430 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 15843 transitions. Word has length 23 [2021-06-05 22:34:23,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:23,430 INFO L482 AbstractCegarLoop]: Abstraction has 3777 states and 15843 transitions. [2021-06-05 22:34:23,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:23,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 15843 transitions. [2021-06-05 22:34:23,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:23,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:23,435 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:23,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-05 22:34:23,636 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:23,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:23,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1331720059, now seen corresponding path program 63 times [2021-06-05 22:34:23,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:23,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943270271] [2021-06-05 22:34:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:23,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:23,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943270271] [2021-06-05 22:34:23,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943270271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:23,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822889429] [2021-06-05 22:34:23,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:23,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:34:23,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:23,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:23,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:23,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:23,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:34:23,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:23,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:23,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:23,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:34:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:23,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822889429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:23,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:23,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:23,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119132993] [2021-06-05 22:34:23,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:23,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:23,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:23,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:23,952 INFO L87 Difference]: Start difference. First operand 3777 states and 15843 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:24,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:24,551 INFO L93 Difference]: Finished difference Result 4636 states and 19200 transitions. [2021-06-05 22:34:24,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:34:24,551 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:24,559 INFO L225 Difference]: With dead ends: 4636 [2021-06-05 22:34:24,559 INFO L226 Difference]: Without dead ends: 4605 [2021-06-05 22:34:24,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 455.7ms TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:34:24,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2021-06-05 22:34:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 3783. [2021-06-05 22:34:24,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.1964569011105235) internal successors, (15871), 3782 states have internal predecessors, (15871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:24,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15871 transitions. [2021-06-05 22:34:24,613 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15871 transitions. Word has length 23 [2021-06-05 22:34:24,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:24,613 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15871 transitions. [2021-06-05 22:34:24,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:24,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15871 transitions. [2021-06-05 22:34:24,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:24,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:24,618 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:24,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:24,819 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:24,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:24,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1919465381, now seen corresponding path program 64 times [2021-06-05 22:34:24,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:24,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322052913] [2021-06-05 22:34:24,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:24,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:24,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322052913] [2021-06-05 22:34:24,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322052913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:24,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527924101] [2021-06-05 22:34:24,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:24,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:24,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:24,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:24,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:25,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:25,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:25,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:25,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:25,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:25,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:34:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:25,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527924101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:25,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:25,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:25,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642846549] [2021-06-05 22:34:25,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:25,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:25,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:25,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:25,113 INFO L87 Difference]: Start difference. First operand 3783 states and 15871 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:25,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:25,843 INFO L93 Difference]: Finished difference Result 4407 states and 18305 transitions. [2021-06-05 22:34:25,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:34:25,843 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:25,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:25,851 INFO L225 Difference]: With dead ends: 4407 [2021-06-05 22:34:25,851 INFO L226 Difference]: Without dead ends: 4379 [2021-06-05 22:34:25,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 570.8ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:34:25,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4379 states. [2021-06-05 22:34:25,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4379 to 3789. [2021-06-05 22:34:25,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.196145723336853) internal successors, (15895), 3788 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15895 transitions. [2021-06-05 22:34:25,920 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15895 transitions. Word has length 23 [2021-06-05 22:34:25,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:25,921 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15895 transitions. [2021-06-05 22:34:25,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:25,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15895 transitions. [2021-06-05 22:34:25,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:25,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:25,926 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:26,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-05 22:34:26,126 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:26,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:26,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1299790759, now seen corresponding path program 65 times [2021-06-05 22:34:26,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:26,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107351489] [2021-06-05 22:34:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:26,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:26,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:26,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107351489] [2021-06-05 22:34:26,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107351489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:26,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245018490] [2021-06-05 22:34:26,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:26,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:34:26,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:26,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:26,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:26,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:26,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:26,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:26,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:26,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:26,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:34:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:26,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245018490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:26,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:26,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:26,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840172392] [2021-06-05 22:34:26,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:26,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:26,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:26,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:26,421 INFO L87 Difference]: Start difference. First operand 3789 states and 15895 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:27,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:27,215 INFO L93 Difference]: Finished difference Result 4332 states and 18009 transitions. [2021-06-05 22:34:27,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:34:27,215 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:27,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:27,223 INFO L225 Difference]: With dead ends: 4332 [2021-06-05 22:34:27,223 INFO L226 Difference]: Without dead ends: 4309 [2021-06-05 22:34:27,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 656.6ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:34:27,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2021-06-05 22:34:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 3771. [2021-06-05 22:34:27,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3771 states, 3770 states have (on average 4.1941644562334215) internal successors, (15812), 3770 states have internal predecessors, (15812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3771 states to 3771 states and 15812 transitions. [2021-06-05 22:34:27,277 INFO L78 Accepts]: Start accepts. Automaton has 3771 states and 15812 transitions. Word has length 23 [2021-06-05 22:34:27,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:27,277 INFO L482 AbstractCegarLoop]: Abstraction has 3771 states and 15812 transitions. [2021-06-05 22:34:27,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:27,277 INFO L276 IsEmpty]: Start isEmpty. Operand 3771 states and 15812 transitions. [2021-06-05 22:34:27,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:27,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:27,282 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:27,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:27,484 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:27,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:27,484 INFO L82 PathProgramCache]: Analyzing trace with hash -615499709, now seen corresponding path program 66 times [2021-06-05 22:34:27,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:27,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903489286] [2021-06-05 22:34:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:27,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:27,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903489286] [2021-06-05 22:34:27,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903489286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:27,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698421523] [2021-06-05 22:34:27,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:27,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:34:27,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:27,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:27,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:27,743 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 22:34:27,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 72 [2021-06-05 22:34:27,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:27,778 INFO L628 ElimStorePlain]: treesize reduction 82, result has 14.6 percent of original size [2021-06-05 22:34:27,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:27,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:14 [2021-06-05 22:34:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:27,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698421523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:27,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:27,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:34:27,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089908321] [2021-06-05 22:34:27,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:34:27,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:27,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:34:27,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:34:27,819 INFO L87 Difference]: Start difference. First operand 3771 states and 15812 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:28,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:28,713 INFO L93 Difference]: Finished difference Result 4648 states and 19256 transitions. [2021-06-05 22:34:28,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:34:28,713 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:28,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:28,721 INFO L225 Difference]: With dead ends: 4648 [2021-06-05 22:34:28,721 INFO L226 Difference]: Without dead ends: 4624 [2021-06-05 22:34:28,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 534.8ms TimeCoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:34:28,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4624 states. [2021-06-05 22:34:28,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4624 to 3783. [2021-06-05 22:34:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.194341618191433) internal successors, (15863), 3782 states have internal predecessors, (15863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:28,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15863 transitions. [2021-06-05 22:34:28,773 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15863 transitions. Word has length 23 [2021-06-05 22:34:28,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:28,773 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15863 transitions. [2021-06-05 22:34:28,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:28,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15863 transitions. [2021-06-05 22:34:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:28,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:28,779 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:28,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2021-06-05 22:34:28,979 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:28,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:28,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1521660669, now seen corresponding path program 67 times [2021-06-05 22:34:28,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:28,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907884077] [2021-06-05 22:34:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:29,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:29,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907884077] [2021-06-05 22:34:29,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907884077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:29,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504370894] [2021-06-05 22:34:29,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:29,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:29,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:29,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:29,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:29,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:29,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:29,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:29,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:34:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:29,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504370894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:29,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:29,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:29,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739373771] [2021-06-05 22:34:29,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:29,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:29,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:29,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:29,293 INFO L87 Difference]: Start difference. First operand 3783 states and 15863 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:29,989 INFO L93 Difference]: Finished difference Result 4458 states and 18490 transitions. [2021-06-05 22:34:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:34:29,989 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:29,997 INFO L225 Difference]: With dead ends: 4458 [2021-06-05 22:34:29,997 INFO L226 Difference]: Without dead ends: 4430 [2021-06-05 22:34:29,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 599.2ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:34:30,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4430 states. [2021-06-05 22:34:30,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4430 to 3789. [2021-06-05 22:34:30,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.194033790918691) internal successors, (15887), 3788 states have internal predecessors, (15887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15887 transitions. [2021-06-05 22:34:30,049 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15887 transitions. Word has length 23 [2021-06-05 22:34:30,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:30,049 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15887 transitions. [2021-06-05 22:34:30,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15887 transitions. [2021-06-05 22:34:30,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:30,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:30,054 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:30,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-06-05 22:34:30,257 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:30,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:30,257 INFO L82 PathProgramCache]: Analyzing trace with hash -445949513, now seen corresponding path program 68 times [2021-06-05 22:34:30,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:30,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123159020] [2021-06-05 22:34:30,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:30,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:30,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123159020] [2021-06-05 22:34:30,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123159020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:30,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532761690] [2021-06-05 22:34:30,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:30,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:30,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:30,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:30,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:30,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:30,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:30,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:30,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:30,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:30,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:34:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:30,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532761690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:30,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:30,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:30,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734160434] [2021-06-05 22:34:30,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:30,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:30,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:30,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:30,559 INFO L87 Difference]: Start difference. First operand 3789 states and 15887 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:31,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:31,286 INFO L93 Difference]: Finished difference Result 4328 states and 17986 transitions. [2021-06-05 22:34:31,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:34:31,286 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:31,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:31,294 INFO L225 Difference]: With dead ends: 4328 [2021-06-05 22:34:31,295 INFO L226 Difference]: Without dead ends: 4305 [2021-06-05 22:34:31,295 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 684.5ms TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:34:31,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2021-06-05 22:34:31,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 3777. [2021-06-05 22:34:31,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3776 states have (on average 4.19385593220339) internal successors, (15836), 3776 states have internal predecessors, (15836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 15836 transitions. [2021-06-05 22:34:31,346 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 15836 transitions. Word has length 23 [2021-06-05 22:34:31,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:31,347 INFO L482 AbstractCegarLoop]: Abstraction has 3777 states and 15836 transitions. [2021-06-05 22:34:31,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:31,347 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 15836 transitions. [2021-06-05 22:34:31,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:31,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:31,352 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:31,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-05 22:34:31,552 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:31,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:31,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1944197129, now seen corresponding path program 69 times [2021-06-05 22:34:31,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:31,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248707862] [2021-06-05 22:34:31,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:31,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:31,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248707862] [2021-06-05 22:34:31,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248707862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:31,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384320887] [2021-06-05 22:34:31,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:31,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:34:31,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:31,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:31,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:31,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:31,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:34:31,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:31,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:31,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:31,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:34:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:31,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384320887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:31,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:31,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:31,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72338476] [2021-06-05 22:34:31,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:31,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:31,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:31,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:31,845 INFO L87 Difference]: Start difference. First operand 3777 states and 15836 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:32,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:32,380 INFO L93 Difference]: Finished difference Result 4278 states and 17803 transitions. [2021-06-05 22:34:32,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:34:32,380 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:32,387 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 22:34:32,387 INFO L226 Difference]: Without dead ends: 4253 [2021-06-05 22:34:32,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 410.9ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:34:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4253 states. [2021-06-05 22:34:32,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4253 to 3781. [2021-06-05 22:34:32,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3781 states, 3780 states have (on average 4.193650793650794) internal successors, (15852), 3780 states have internal predecessors, (15852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:32,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3781 states to 3781 states and 15852 transitions. [2021-06-05 22:34:32,437 INFO L78 Accepts]: Start accepts. Automaton has 3781 states and 15852 transitions. Word has length 23 [2021-06-05 22:34:32,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:32,437 INFO L482 AbstractCegarLoop]: Abstraction has 3781 states and 15852 transitions. [2021-06-05 22:34:32,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:32,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3781 states and 15852 transitions. [2021-06-05 22:34:32,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:32,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:32,442 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:32,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-06-05 22:34:32,642 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:32,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:32,642 INFO L82 PathProgramCache]: Analyzing trace with hash 403052635, now seen corresponding path program 98 times [2021-06-05 22:34:32,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:32,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770013743] [2021-06-05 22:34:32,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:32,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:32,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770013743] [2021-06-05 22:34:32,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770013743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:32,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614659573] [2021-06-05 22:34:32,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:32,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:32,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:32,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:32,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:32,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:32,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:34:32,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:32,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:32,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:32,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:34:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:32,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614659573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:32,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:32,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:32,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591086214] [2021-06-05 22:34:32,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:32,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:32,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:32,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:32,965 INFO L87 Difference]: Start difference. First operand 3781 states and 15852 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:33,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:33,362 INFO L93 Difference]: Finished difference Result 4001 states and 16695 transitions. [2021-06-05 22:34:33,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:34:33,362 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:33,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:33,370 INFO L225 Difference]: With dead ends: 4001 [2021-06-05 22:34:33,370 INFO L226 Difference]: Without dead ends: 3986 [2021-06-05 22:34:33,370 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 407.7ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:34:33,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2021-06-05 22:34:33,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3787. [2021-06-05 22:34:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 3786 states have (on average 4.194136291600634) internal successors, (15879), 3786 states have internal predecessors, (15879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:33,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 15879 transitions. [2021-06-05 22:34:33,420 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 15879 transitions. Word has length 23 [2021-06-05 22:34:33,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:33,420 INFO L482 AbstractCegarLoop]: Abstraction has 3787 states and 15879 transitions. [2021-06-05 22:34:33,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:33,421 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 15879 transitions. [2021-06-05 22:34:33,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:33,426 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:33,426 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:33,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:33,627 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:33,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:33,627 INFO L82 PathProgramCache]: Analyzing trace with hash 268264731, now seen corresponding path program 99 times [2021-06-05 22:34:33,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:33,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743184999] [2021-06-05 22:34:33,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:33,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:33,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743184999] [2021-06-05 22:34:33,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743184999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:33,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521564675] [2021-06-05 22:34:33,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:33,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:34:33,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:33,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:34:33,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:33,879 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:34:33,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 22:34:33,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:34:33,906 INFO L628 ElimStorePlain]: treesize reduction 70, result has 16.7 percent of original size [2021-06-05 22:34:33,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:33,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 22:34:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:33,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521564675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:33,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:33,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:34:33,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562020994] [2021-06-05 22:34:33,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:34:33,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:33,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:34:33,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:34:33,945 INFO L87 Difference]: Start difference. First operand 3787 states and 15879 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:34,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:34,484 INFO L93 Difference]: Finished difference Result 4188 states and 17441 transitions. [2021-06-05 22:34:34,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:34:34,484 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:34,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:34,492 INFO L225 Difference]: With dead ends: 4188 [2021-06-05 22:34:34,492 INFO L226 Difference]: Without dead ends: 4173 [2021-06-05 22:34:34,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 439.4ms TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:34:34,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2021-06-05 22:34:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 3795. [2021-06-05 22:34:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 4.194254085397997) internal successors, (15913), 3794 states have internal predecessors, (15913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 15913 transitions. [2021-06-05 22:34:34,546 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 15913 transitions. Word has length 23 [2021-06-05 22:34:34,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:34,546 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 15913 transitions. [2021-06-05 22:34:34,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 15913 transitions. [2021-06-05 22:34:34,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:34,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:34,551 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:34,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:34,752 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:34,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:34,752 INFO L82 PathProgramCache]: Analyzing trace with hash 853598683, now seen corresponding path program 100 times [2021-06-05 22:34:34,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:34,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877950729] [2021-06-05 22:34:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:34,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:34,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877950729] [2021-06-05 22:34:34,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877950729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:34,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719155081] [2021-06-05 22:34:34,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:34,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:34,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:34,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:34,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:34,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:34,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:34,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:34,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:34,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:34,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:34:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:35,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719155081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:35,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:35,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:35,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539501242] [2021-06-05 22:34:35,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:35,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:35,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:35,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:35,051 INFO L87 Difference]: Start difference. First operand 3795 states and 15913 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:35,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:35,762 INFO L93 Difference]: Finished difference Result 4042 states and 16845 transitions. [2021-06-05 22:34:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:34:35,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:35,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:35,769 INFO L225 Difference]: With dead ends: 4042 [2021-06-05 22:34:35,769 INFO L226 Difference]: Without dead ends: 4020 [2021-06-05 22:34:35,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 552.9ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:34:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4020 states. [2021-06-05 22:34:35,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4020 to 3799. [2021-06-05 22:34:35,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3798 states have (on average 4.194049499736703) internal successors, (15929), 3798 states have internal predecessors, (15929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:35,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 15929 transitions. [2021-06-05 22:34:35,818 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 15929 transitions. Word has length 23 [2021-06-05 22:34:35,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:35,818 INFO L482 AbstractCegarLoop]: Abstraction has 3799 states and 15929 transitions. [2021-06-05 22:34:35,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:35,818 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 15929 transitions. [2021-06-05 22:34:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:35,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:35,823 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:36,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-05 22:34:36,025 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:36,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1827801879, now seen corresponding path program 101 times [2021-06-05 22:34:36,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:36,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037410660] [2021-06-05 22:34:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:36,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:36,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037410660] [2021-06-05 22:34:36,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037410660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:36,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665847151] [2021-06-05 22:34:36,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:36,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:34:36,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:36,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:36,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:36,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:36,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:36,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-06-05 22:34:36,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:36,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:36,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:36,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:29 [2021-06-05 22:34:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:36,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665847151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:36,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:36,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:36,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580261382] [2021-06-05 22:34:36,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:36,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:36,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:36,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:36,320 INFO L87 Difference]: Start difference. First operand 3799 states and 15929 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:37,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:37,006 INFO L93 Difference]: Finished difference Result 4089 states and 17043 transitions. [2021-06-05 22:34:37,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:34:37,006 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:37,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:37,014 INFO L225 Difference]: With dead ends: 4089 [2021-06-05 22:34:37,014 INFO L226 Difference]: Without dead ends: 4074 [2021-06-05 22:34:37,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 519.0ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:34:37,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4074 states. [2021-06-05 22:34:37,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4074 to 3791. [2021-06-05 22:34:37,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3791 states, 3790 states have (on average 4.193931398416886) internal successors, (15895), 3790 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3791 states to 3791 states and 15895 transitions. [2021-06-05 22:34:37,065 INFO L78 Accepts]: Start accepts. Automaton has 3791 states and 15895 transitions. Word has length 23 [2021-06-05 22:34:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:37,065 INFO L482 AbstractCegarLoop]: Abstraction has 3791 states and 15895 transitions. [2021-06-05 22:34:37,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3791 states and 15895 transitions. [2021-06-05 22:34:37,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:37,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:37,071 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:37,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:37,272 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:37,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:37,272 INFO L82 PathProgramCache]: Analyzing trace with hash 422702249, now seen corresponding path program 102 times [2021-06-05 22:34:37,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:37,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293861895] [2021-06-05 22:34:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:37,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:37,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293861895] [2021-06-05 22:34:37,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293861895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:37,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114668855] [2021-06-05 22:34:37,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:37,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:34:37,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:37,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:37,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:37,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:37,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:34:37,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:37,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:37,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:37,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:34:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:37,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114668855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:37,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:37,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:37,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667870145] [2021-06-05 22:34:37,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:37,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:37,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:37,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:37,656 INFO L87 Difference]: Start difference. First operand 3791 states and 15895 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:38,174 INFO L93 Difference]: Finished difference Result 3985 states and 16631 transitions. [2021-06-05 22:34:38,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:34:38,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:38,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:38,181 INFO L225 Difference]: With dead ends: 3985 [2021-06-05 22:34:38,182 INFO L226 Difference]: Without dead ends: 3970 [2021-06-05 22:34:38,182 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 491.5ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:34:38,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2021-06-05 22:34:38,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 3783. [2021-06-05 22:34:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.193812797461661) internal successors, (15861), 3782 states have internal predecessors, (15861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15861 transitions. [2021-06-05 22:34:38,231 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15861 transitions. Word has length 23 [2021-06-05 22:34:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:38,231 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15861 transitions. [2021-06-05 22:34:38,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:38,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15861 transitions. [2021-06-05 22:34:38,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:38,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:38,236 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:38,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable548 [2021-06-05 22:34:38,438 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:38,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:38,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1086638551, now seen corresponding path program 103 times [2021-06-05 22:34:38,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:38,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643745547] [2021-06-05 22:34:38,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:38,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:38,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643745547] [2021-06-05 22:34:38,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643745547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:38,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11393341] [2021-06-05 22:34:38,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:38,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:38,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:38,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:38,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:34:38,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:38,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:38,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:38,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:34:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:38,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11393341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:38,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:38,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:38,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940984648] [2021-06-05 22:34:38,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:38,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:38,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:38,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:38,754 INFO L87 Difference]: Start difference. First operand 3783 states and 15861 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:39,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:39,221 INFO L93 Difference]: Finished difference Result 4021 states and 16775 transitions. [2021-06-05 22:34:39,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:34:39,222 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:39,229 INFO L225 Difference]: With dead ends: 4021 [2021-06-05 22:34:39,229 INFO L226 Difference]: Without dead ends: 4006 [2021-06-05 22:34:39,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 430.3ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:34:39,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4006 states. [2021-06-05 22:34:39,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4006 to 3787. [2021-06-05 22:34:39,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 3786 states have (on average 4.194136291600634) internal successors, (15879), 3786 states have internal predecessors, (15879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:39,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 15879 transitions. [2021-06-05 22:34:39,279 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 15879 transitions. Word has length 23 [2021-06-05 22:34:39,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:39,279 INFO L482 AbstractCegarLoop]: Abstraction has 3787 states and 15879 transitions. [2021-06-05 22:34:39,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:39,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 15879 transitions. [2021-06-05 22:34:39,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:39,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:39,285 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:39,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:39,485 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:39,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:39,485 INFO L82 PathProgramCache]: Analyzing trace with hash 664704283, now seen corresponding path program 104 times [2021-06-05 22:34:39,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:39,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951386704] [2021-06-05 22:34:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:39,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:39,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951386704] [2021-06-05 22:34:39,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951386704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:39,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949815575] [2021-06-05 22:34:39,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:39,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:39,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:39,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:39,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:39,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:39,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:34:39,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:39,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:39,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:39,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:34:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:39,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949815575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:39,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:39,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:39,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271278197] [2021-06-05 22:34:39,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:39,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:39,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:39,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:39,776 INFO L87 Difference]: Start difference. First operand 3787 states and 15879 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:40,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:40,357 INFO L93 Difference]: Finished difference Result 4068 states and 16967 transitions. [2021-06-05 22:34:40,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:34:40,358 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:40,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:40,365 INFO L225 Difference]: With dead ends: 4068 [2021-06-05 22:34:40,365 INFO L226 Difference]: Without dead ends: 4053 [2021-06-05 22:34:40,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 443.5ms TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:34:40,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2021-06-05 22:34:40,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 3795. [2021-06-05 22:34:40,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 4.194254085397997) internal successors, (15913), 3794 states have internal predecessors, (15913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:40,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 15913 transitions. [2021-06-05 22:34:40,414 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 15913 transitions. Word has length 23 [2021-06-05 22:34:40,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:40,414 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 15913 transitions. [2021-06-05 22:34:40,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 15913 transitions. [2021-06-05 22:34:40,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:40,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:40,419 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:40,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 22:34:40,621 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:40,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:40,621 INFO L82 PathProgramCache]: Analyzing trace with hash -241456677, now seen corresponding path program 105 times [2021-06-05 22:34:40,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:40,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103102479] [2021-06-05 22:34:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:40,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:40,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103102479] [2021-06-05 22:34:40,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103102479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:40,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667842998] [2021-06-05 22:34:40,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:40,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:34:40,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:40,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:34:40,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:40,898 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:34:40,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 22:34:40,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:40,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:40,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:40,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:38 [2021-06-05 22:34:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:41,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667842998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:41,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:41,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:34:41,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286252208] [2021-06-05 22:34:41,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:34:41,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:41,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:34:41,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:34:41,022 INFO L87 Difference]: Start difference. First operand 3795 states and 15913 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:41,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:41,671 INFO L93 Difference]: Finished difference Result 4160 states and 17326 transitions. [2021-06-05 22:34:41,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:34:41,671 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:41,678 INFO L225 Difference]: With dead ends: 4160 [2021-06-05 22:34:41,678 INFO L226 Difference]: Without dead ends: 4139 [2021-06-05 22:34:41,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 634.4ms TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:34:41,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-06-05 22:34:41,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3799. [2021-06-05 22:34:41,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3798 states have (on average 4.194049499736703) internal successors, (15929), 3798 states have internal predecessors, (15929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 15929 transitions. [2021-06-05 22:34:41,728 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 15929 transitions. Word has length 23 [2021-06-05 22:34:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:41,728 INFO L482 AbstractCegarLoop]: Abstraction has 3799 states and 15929 transitions. [2021-06-05 22:34:41,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 15929 transitions. [2021-06-05 22:34:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:41,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:41,733 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:41,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 22:34:41,937 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:41,937 INFO L82 PathProgramCache]: Analyzing trace with hash 834254479, now seen corresponding path program 106 times [2021-06-05 22:34:41,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:41,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112909579] [2021-06-05 22:34:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:42,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:42,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112909579] [2021-06-05 22:34:42,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112909579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:42,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737950823] [2021-06-05 22:34:42,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:42,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:42,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:42,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:42,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:42,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:42,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:42,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:42,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:42,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:42,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:34:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:42,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737950823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:42,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:42,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:42,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178587539] [2021-06-05 22:34:42,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:42,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:42,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:42,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:42,252 INFO L87 Difference]: Start difference. First operand 3799 states and 15929 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:42,898 INFO L93 Difference]: Finished difference Result 3994 states and 16671 transitions. [2021-06-05 22:34:42,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:34:42,898 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:42,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:42,905 INFO L225 Difference]: With dead ends: 3994 [2021-06-05 22:34:42,905 INFO L226 Difference]: Without dead ends: 3979 [2021-06-05 22:34:42,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 591.0ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:34:42,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2021-06-05 22:34:42,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 3791. [2021-06-05 22:34:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3791 states, 3790 states have (on average 4.193931398416886) internal successors, (15895), 3790 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:42,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3791 states to 3791 states and 15895 transitions. [2021-06-05 22:34:42,954 INFO L78 Accepts]: Start accepts. Automaton has 3791 states and 15895 transitions. Word has length 23 [2021-06-05 22:34:42,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:42,954 INFO L482 AbstractCegarLoop]: Abstraction has 3791 states and 15895 transitions. [2021-06-05 22:34:42,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:42,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3791 states and 15895 transitions. [2021-06-05 22:34:42,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:42,959 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:42,959 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:43,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-05 22:34:43,159 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:43,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:43,160 INFO L82 PathProgramCache]: Analyzing trace with hash -663993137, now seen corresponding path program 107 times [2021-06-05 22:34:43,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:43,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640217109] [2021-06-05 22:34:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:43,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:43,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640217109] [2021-06-05 22:34:43,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640217109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:43,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725707232] [2021-06-05 22:34:43,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:43,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:34:43,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:43,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:43,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:43,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:43,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:34:43,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:43,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:43,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:43,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:34:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:43,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725707232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:43,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:43,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:43,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092626955] [2021-06-05 22:34:43,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:43,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:43,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:43,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:43,456 INFO L87 Difference]: Start difference. First operand 3791 states and 15895 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:43,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:43,897 INFO L93 Difference]: Finished difference Result 4023 states and 16783 transitions. [2021-06-05 22:34:43,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:34:43,897 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:43,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:43,904 INFO L225 Difference]: With dead ends: 4023 [2021-06-05 22:34:43,905 INFO L226 Difference]: Without dead ends: 4008 [2021-06-05 22:34:43,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 407.8ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:34:43,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2021-06-05 22:34:43,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 3783. [2021-06-05 22:34:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.193812797461661) internal successors, (15861), 3782 states have internal predecessors, (15861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15861 transitions. [2021-06-05 22:34:43,953 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15861 transitions. Word has length 23 [2021-06-05 22:34:43,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:43,953 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15861 transitions. [2021-06-05 22:34:43,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:43,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15861 transitions. [2021-06-05 22:34:43,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:43,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:43,958 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:44,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:44,159 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:44,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:44,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1209919013, now seen corresponding path program 108 times [2021-06-05 22:34:44,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:44,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447657352] [2021-06-05 22:34:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:44,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:44,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447657352] [2021-06-05 22:34:44,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447657352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:44,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893047635] [2021-06-05 22:34:44,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:44,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:34:44,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:44,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:44,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:44,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:44,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:34:44,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:44,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:44,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:44,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:34:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:44,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893047635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:44,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:44,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:44,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619104813] [2021-06-05 22:34:44,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:44,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:44,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:44,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:44,456 INFO L87 Difference]: Start difference. First operand 3783 states and 15861 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:45,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:45,019 INFO L93 Difference]: Finished difference Result 4048 states and 16879 transitions. [2021-06-05 22:34:45,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:34:45,020 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:45,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:45,027 INFO L225 Difference]: With dead ends: 4048 [2021-06-05 22:34:45,027 INFO L226 Difference]: Without dead ends: 4033 [2021-06-05 22:34:45,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 456.7ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:34:45,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4033 states. [2021-06-05 22:34:45,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4033 to 3791. [2021-06-05 22:34:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3791 states, 3790 states have (on average 4.1941952506596305) internal successors, (15896), 3790 states have internal predecessors, (15896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:45,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3791 states to 3791 states and 15896 transitions. [2021-06-05 22:34:45,075 INFO L78 Accepts]: Start accepts. Automaton has 3791 states and 15896 transitions. Word has length 23 [2021-06-05 22:34:45,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:45,076 INFO L482 AbstractCegarLoop]: Abstraction has 3791 states and 15896 transitions. [2021-06-05 22:34:45,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:45,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3791 states and 15896 transitions. [2021-06-05 22:34:45,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:45,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:45,081 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:45,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-05 22:34:45,281 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:45,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:45,281 INFO L82 PathProgramCache]: Analyzing trace with hash -624585061, now seen corresponding path program 109 times [2021-06-05 22:34:45,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:45,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454437091] [2021-06-05 22:34:45,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:45,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:45,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454437091] [2021-06-05 22:34:45,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454437091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:45,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368835355] [2021-06-05 22:34:45,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:45,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:45,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:45,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:45,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:45,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:45,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:45,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:45,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:34:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:45,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368835355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:45,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:45,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:45,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807477745] [2021-06-05 22:34:45,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:45,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:45,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:45,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:45,577 INFO L87 Difference]: Start difference. First operand 3791 states and 15896 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:46,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:46,232 INFO L93 Difference]: Finished difference Result 3982 states and 16610 transitions. [2021-06-05 22:34:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:34:46,232 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:46,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:46,239 INFO L225 Difference]: With dead ends: 3982 [2021-06-05 22:34:46,239 INFO L226 Difference]: Without dead ends: 3960 [2021-06-05 22:34:46,239 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 570.9ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:34:46,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3960 states. [2021-06-05 22:34:46,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3960 to 3795. [2021-06-05 22:34:46,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 4.193990511333685) internal successors, (15912), 3794 states have internal predecessors, (15912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 15912 transitions. [2021-06-05 22:34:46,295 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 15912 transitions. Word has length 23 [2021-06-05 22:34:46,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:46,295 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 15912 transitions. [2021-06-05 22:34:46,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:46,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 15912 transitions. [2021-06-05 22:34:46,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:46,300 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:46,300 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:46,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-05 22:34:46,501 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:46,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:46,501 INFO L82 PathProgramCache]: Analyzing trace with hash 988981673, now seen corresponding path program 110 times [2021-06-05 22:34:46,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:46,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313287715] [2021-06-05 22:34:46,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:46,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:46,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313287715] [2021-06-05 22:34:46,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313287715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:46,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958029432] [2021-06-05 22:34:46,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:46,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:46,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:46,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:34:46,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:46,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:46,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 46 [2021-06-05 22:34:46,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:46,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:46,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:46,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:37 [2021-06-05 22:34:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:46,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958029432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:46,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:46,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:34:46,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172811112] [2021-06-05 22:34:46,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:34:46,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:46,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:34:46,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:34:46,783 INFO L87 Difference]: Start difference. First operand 3795 states and 15912 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:47,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:47,190 INFO L93 Difference]: Finished difference Result 3968 states and 16563 transitions. [2021-06-05 22:34:47,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:34:47,190 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:47,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:47,197 INFO L225 Difference]: With dead ends: 3968 [2021-06-05 22:34:47,197 INFO L226 Difference]: Without dead ends: 3953 [2021-06-05 22:34:47,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 387.6ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:34:47,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3953 states. [2021-06-05 22:34:47,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3953 to 3787. [2021-06-05 22:34:47,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 3786 states have (on average 4.193872160591654) internal successors, (15878), 3786 states have internal predecessors, (15878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:47,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 15878 transitions. [2021-06-05 22:34:47,250 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 15878 transitions. Word has length 23 [2021-06-05 22:34:47,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:47,250 INFO L482 AbstractCegarLoop]: Abstraction has 3787 states and 15878 transitions. [2021-06-05 22:34:47,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:47,250 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 15878 transitions. [2021-06-05 22:34:47,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:47,255 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:47,255 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:47,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:47,455 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:47,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1437140393, now seen corresponding path program 111 times [2021-06-05 22:34:47,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:47,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540457252] [2021-06-05 22:34:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:47,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:47,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540457252] [2021-06-05 22:34:47,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540457252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:47,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767868168] [2021-06-05 22:34:47,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:47,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:34:47,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:47,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:47,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:47,714 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:34:47,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 22:34:47,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:34:47,739 INFO L628 ElimStorePlain]: treesize reduction 55, result has 20.3 percent of original size [2021-06-05 22:34:47,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:47,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 22:34:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:47,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767868168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:47,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:47,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:34:47,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068467571] [2021-06-05 22:34:47,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:34:47,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:47,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:34:47,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:34:47,783 INFO L87 Difference]: Start difference. First operand 3787 states and 15878 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:48,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:48,401 INFO L93 Difference]: Finished difference Result 4341 states and 18059 transitions. [2021-06-05 22:34:48,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:34:48,402 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:48,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:48,410 INFO L225 Difference]: With dead ends: 4341 [2021-06-05 22:34:48,410 INFO L226 Difference]: Without dead ends: 4326 [2021-06-05 22:34:48,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 462.6ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:34:48,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-05 22:34:48,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3791. [2021-06-05 22:34:48,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3791 states, 3790 states have (on average 4.1941952506596305) internal successors, (15896), 3790 states have internal predecessors, (15896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3791 states to 3791 states and 15896 transitions. [2021-06-05 22:34:48,463 INFO L78 Accepts]: Start accepts. Automaton has 3791 states and 15896 transitions. Word has length 23 [2021-06-05 22:34:48,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:48,463 INFO L482 AbstractCegarLoop]: Abstraction has 3791 states and 15896 transitions. [2021-06-05 22:34:48,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:48,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3791 states and 15896 transitions. [2021-06-05 22:34:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:48,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:48,468 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:48,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-05 22:34:48,668 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:48,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:48,669 INFO L82 PathProgramCache]: Analyzing trace with hash -923613541, now seen corresponding path program 112 times [2021-06-05 22:34:48,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:48,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042729153] [2021-06-05 22:34:48,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:48,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:48,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042729153] [2021-06-05 22:34:48,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042729153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:48,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015221511] [2021-06-05 22:34:48,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:48,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:48,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:48,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:48,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:48,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:48,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:48,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:48,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:48,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:48,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:34:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:48,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015221511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:48,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:48,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:48,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239179810] [2021-06-05 22:34:48,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:48,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:48,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:48,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:48,972 INFO L87 Difference]: Start difference. First operand 3791 states and 15896 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:49,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:49,611 INFO L93 Difference]: Finished difference Result 4028 states and 16799 transitions. [2021-06-05 22:34:49,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:34:49,612 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:49,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:49,619 INFO L225 Difference]: With dead ends: 4028 [2021-06-05 22:34:49,619 INFO L226 Difference]: Without dead ends: 4007 [2021-06-05 22:34:49,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 628.5ms TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:34:49,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-06-05 22:34:49,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3795. [2021-06-05 22:34:49,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 4.193990511333685) internal successors, (15912), 3794 states have internal predecessors, (15912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 15912 transitions. [2021-06-05 22:34:49,668 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 15912 transitions. Word has length 23 [2021-06-05 22:34:49,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:49,668 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 15912 transitions. [2021-06-05 22:34:49,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:49,669 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 15912 transitions. [2021-06-05 22:34:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:49,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:49,674 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:49,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-06-05 22:34:49,874 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:49,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:49,874 INFO L82 PathProgramCache]: Analyzing trace with hash 152097615, now seen corresponding path program 113 times [2021-06-05 22:34:49,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:49,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879592152] [2021-06-05 22:34:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:49,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:49,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879592152] [2021-06-05 22:34:49,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879592152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:49,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586379021] [2021-06-05 22:34:49,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:49,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:49,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:49,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:49,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:50,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:50,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:50,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:50,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:50,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:50,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:34:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:50,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586379021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:50,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:50,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:50,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222500199] [2021-06-05 22:34:50,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:50,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:50,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:50,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:50,177 INFO L87 Difference]: Start difference. First operand 3795 states and 15912 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:50,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:50,873 INFO L93 Difference]: Finished difference Result 4007 states and 16723 transitions. [2021-06-05 22:34:50,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:34:50,873 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:50,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:50,880 INFO L225 Difference]: With dead ends: 4007 [2021-06-05 22:34:50,880 INFO L226 Difference]: Without dead ends: 3992 [2021-06-05 22:34:50,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 609.3ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:34:50,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3992 states. [2021-06-05 22:34:50,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3992 to 3787. [2021-06-05 22:34:50,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 3786 states have (on average 4.193872160591654) internal successors, (15878), 3786 states have internal predecessors, (15878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:50,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 15878 transitions. [2021-06-05 22:34:50,930 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 15878 transitions. Word has length 23 [2021-06-05 22:34:50,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:50,930 INFO L482 AbstractCegarLoop]: Abstraction has 3787 states and 15878 transitions. [2021-06-05 22:34:50,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:50,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 15878 transitions. [2021-06-05 22:34:50,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:50,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:50,935 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:51,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 22:34:51,136 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:51,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:51,136 INFO L82 PathProgramCache]: Analyzing trace with hash 433093467, now seen corresponding path program 114 times [2021-06-05 22:34:51,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:51,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663115255] [2021-06-05 22:34:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:51,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:51,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663115255] [2021-06-05 22:34:51,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663115255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:51,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997212781] [2021-06-05 22:34:51,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:51,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:34:51,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:51,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:34:51,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:51,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:51,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:34:51,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:51,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 35 [2021-06-05 22:34:51,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:51,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:51,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:51,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 22:34:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:51,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997212781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:51,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:51,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:51,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345656451] [2021-06-05 22:34:51,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:51,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:51,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:51,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:51,449 INFO L87 Difference]: Start difference. First operand 3787 states and 15878 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:51,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:51,904 INFO L93 Difference]: Finished difference Result 3993 states and 16666 transitions. [2021-06-05 22:34:51,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:34:51,905 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:51,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:51,912 INFO L225 Difference]: With dead ends: 3993 [2021-06-05 22:34:51,912 INFO L226 Difference]: Without dead ends: 3971 [2021-06-05 22:34:51,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 435.6ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:34:51,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-06-05 22:34:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 3796. [2021-06-05 22:34:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.19235836627141) internal successors, (15910), 3795 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15910 transitions. [2021-06-05 22:34:51,961 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15910 transitions. Word has length 23 [2021-06-05 22:34:51,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:51,961 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15910 transitions. [2021-06-05 22:34:51,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:51,961 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15910 transitions. [2021-06-05 22:34:51,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:51,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:51,966 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:52,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-06-05 22:34:52,166 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:52,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:52,166 INFO L82 PathProgramCache]: Analyzing trace with hash -608482601, now seen corresponding path program 115 times [2021-06-05 22:34:52,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:52,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987025214] [2021-06-05 22:34:52,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:52,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:52,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987025214] [2021-06-05 22:34:52,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987025214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:52,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893249471] [2021-06-05 22:34:52,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:52,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:52,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:52,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:52,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:52,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:52,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:52,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:52,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:34:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:52,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893249471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:52,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:52,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:52,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672587644] [2021-06-05 22:34:52,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:52,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:52,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:52,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:52,491 INFO L87 Difference]: Start difference. First operand 3796 states and 15910 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:52,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:52,983 INFO L93 Difference]: Finished difference Result 4008 states and 16725 transitions. [2021-06-05 22:34:52,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:34:52,984 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:52,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:52,991 INFO L225 Difference]: With dead ends: 4008 [2021-06-05 22:34:52,991 INFO L226 Difference]: Without dead ends: 3984 [2021-06-05 22:34:52,991 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 509.8ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:34:52,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3984 states. [2021-06-05 22:34:53,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3984 to 3789. [2021-06-05 22:34:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.193769799366421) internal successors, (15886), 3788 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15886 transitions. [2021-06-05 22:34:53,039 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15886 transitions. Word has length 23 [2021-06-05 22:34:53,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:53,039 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15886 transitions. [2021-06-05 22:34:53,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:53,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15886 transitions. [2021-06-05 22:34:53,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:53,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:53,044 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:53,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:53,245 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:53,245 INFO L82 PathProgramCache]: Analyzing trace with hash -895603953, now seen corresponding path program 116 times [2021-06-05 22:34:53,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:53,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114227439] [2021-06-05 22:34:53,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:53,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:53,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114227439] [2021-06-05 22:34:53,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114227439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:53,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935490357] [2021-06-05 22:34:53,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:53,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:53,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:53,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:53,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:53,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:53,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:53,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:53,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:53,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:53,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:34:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:53,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935490357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:53,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:53,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:53,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194460682] [2021-06-05 22:34:53,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:53,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:53,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:53,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:53,559 INFO L87 Difference]: Start difference. First operand 3789 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:54,185 INFO L93 Difference]: Finished difference Result 3948 states and 16476 transitions. [2021-06-05 22:34:54,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:34:54,186 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:54,193 INFO L225 Difference]: With dead ends: 3948 [2021-06-05 22:34:54,193 INFO L226 Difference]: Without dead ends: 3926 [2021-06-05 22:34:54,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 561.2ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:34:54,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-05 22:34:54,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3793. [2021-06-05 22:34:54,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 4.193565400843882) internal successors, (15902), 3792 states have internal predecessors, (15902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:54,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 15902 transitions. [2021-06-05 22:34:54,240 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 15902 transitions. Word has length 23 [2021-06-05 22:34:54,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:54,241 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 15902 transitions. [2021-06-05 22:34:54,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:54,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 15902 transitions. [2021-06-05 22:34:54,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:54,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:54,246 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:54,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:54,446 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:54,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:54,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1388821339, now seen corresponding path program 117 times [2021-06-05 22:34:54,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:54,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475109690] [2021-06-05 22:34:54,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:54,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:54,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475109690] [2021-06-05 22:34:54,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475109690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:54,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316692197] [2021-06-05 22:34:54,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:54,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:34:54,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:54,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:34:54,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:54,686 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-06-05 22:34:54,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 59 [2021-06-05 22:34:54,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:54,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:54,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:54,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:351 [2021-06-05 22:34:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:54,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316692197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:54,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:54,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:34:54,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96611408] [2021-06-05 22:34:54,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:34:54,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:54,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:34:54,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:34:54,967 INFO L87 Difference]: Start difference. First operand 3793 states and 15902 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:55,438 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2021-06-05 22:34:55,729 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 22:34:56,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:56,384 INFO L93 Difference]: Finished difference Result 4313 states and 17944 transitions. [2021-06-05 22:34:56,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:34:56,384 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:56,392 INFO L225 Difference]: With dead ends: 4313 [2021-06-05 22:34:56,392 INFO L226 Difference]: Without dead ends: 4298 [2021-06-05 22:34:56,392 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1316.7ms TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:34:56,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2021-06-05 22:34:56,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 3789. [2021-06-05 22:34:56,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.193769799366421) internal successors, (15886), 3788 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15886 transitions. [2021-06-05 22:34:56,444 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15886 transitions. Word has length 23 [2021-06-05 22:34:56,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:56,444 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15886 transitions. [2021-06-05 22:34:56,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15886 transitions. [2021-06-05 22:34:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:56,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:56,449 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:56,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:56,649 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:56,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:56,650 INFO L82 PathProgramCache]: Analyzing trace with hash -454045083, now seen corresponding path program 118 times [2021-06-05 22:34:56,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:56,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861211963] [2021-06-05 22:34:56,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:56,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:56,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861211963] [2021-06-05 22:34:56,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861211963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:56,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512436758] [2021-06-05 22:34:56,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:56,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:56,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:56,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:56,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:56,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:56,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:56,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:56,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:56,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:56,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:34:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:56,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512436758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:56,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:56,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:56,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569685940] [2021-06-05 22:34:56,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:56,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:56,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:56,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:56,981 INFO L87 Difference]: Start difference. First operand 3789 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:57,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:57,581 INFO L93 Difference]: Finished difference Result 3962 states and 16538 transitions. [2021-06-05 22:34:57,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:34:57,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:57,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:57,588 INFO L225 Difference]: With dead ends: 3962 [2021-06-05 22:34:57,588 INFO L226 Difference]: Without dead ends: 3941 [2021-06-05 22:34:57,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 611.7ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:34:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3941 states. [2021-06-05 22:34:57,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3941 to 3793. [2021-06-05 22:34:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 4.193565400843882) internal successors, (15902), 3792 states have internal predecessors, (15902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:57,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 15902 transitions. [2021-06-05 22:34:57,637 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 15902 transitions. Word has length 23 [2021-06-05 22:34:57,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:57,637 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 15902 transitions. [2021-06-05 22:34:57,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:57,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 15902 transitions. [2021-06-05 22:34:57,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:57,642 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:57,642 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:57,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:57,842 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:57,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:57,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1466737615, now seen corresponding path program 119 times [2021-06-05 22:34:57,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:57,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043776972] [2021-06-05 22:34:57,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:57,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:57,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043776972] [2021-06-05 22:34:57,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043776972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:57,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009397847] [2021-06-05 22:34:57,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:57,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:34:57,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:57,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:57,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:58,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:58,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:34:58,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:58,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:58,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:58,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:34:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:58,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009397847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:58,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:58,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:58,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178847502] [2021-06-05 22:34:58,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:58,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:58,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:58,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:58,172 INFO L87 Difference]: Start difference. First operand 3793 states and 15902 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:58,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:58,859 INFO L93 Difference]: Finished difference Result 3954 states and 16513 transitions. [2021-06-05 22:34:58,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:34:58,859 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:58,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:58,866 INFO L225 Difference]: With dead ends: 3954 [2021-06-05 22:34:58,866 INFO L226 Difference]: Without dead ends: 3939 [2021-06-05 22:34:58,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 656.5ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:34:58,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2021-06-05 22:34:58,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 3785. [2021-06-05 22:34:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3784 states have (on average 4.193710359408033) internal successors, (15869), 3784 states have internal predecessors, (15869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 15869 transitions. [2021-06-05 22:34:58,914 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 15869 transitions. Word has length 23 [2021-06-05 22:34:58,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:58,914 INFO L482 AbstractCegarLoop]: Abstraction has 3785 states and 15869 transitions. [2021-06-05 22:34:58,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:58,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 15869 transitions. [2021-06-05 22:34:58,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:34:58,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:58,919 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:59,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:59,120 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:59,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:59,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1812114575, now seen corresponding path program 120 times [2021-06-05 22:34:59,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:59,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435905545] [2021-06-05 22:34:59,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:59,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:59,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435905545] [2021-06-05 22:34:59,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435905545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:59,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834228574] [2021-06-05 22:34:59,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:59,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:34:59,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:59,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:34:59,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:59,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:59,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:34:59,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:59,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:59,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:59,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:34:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:59,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834228574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:59,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:59,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:34:59,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418129017] [2021-06-05 22:34:59,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:34:59,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:59,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:34:59,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:34:59,412 INFO L87 Difference]: Start difference. First operand 3785 states and 15869 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:59,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:59,953 INFO L93 Difference]: Finished difference Result 4034 states and 16823 transitions. [2021-06-05 22:34:59,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:34:59,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:34:59,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:59,960 INFO L225 Difference]: With dead ends: 4034 [2021-06-05 22:34:59,961 INFO L226 Difference]: Without dead ends: 4019 [2021-06-05 22:34:59,961 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 430.8ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:34:59,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4019 states. [2021-06-05 22:34:59,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4019 to 3793. [2021-06-05 22:35:00,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 4.193829113924051) internal successors, (15903), 3792 states have internal predecessors, (15903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:00,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 15903 transitions. [2021-06-05 22:35:00,010 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 15903 transitions. Word has length 23 [2021-06-05 22:35:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:00,010 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 15903 transitions. [2021-06-05 22:35:00,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:00,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 15903 transitions. [2021-06-05 22:35:00,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:00,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:00,016 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:00,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-06-05 22:35:00,216 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:00,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:00,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1897518769, now seen corresponding path program 121 times [2021-06-05 22:35:00,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:00,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322193635] [2021-06-05 22:35:00,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:00,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:00,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322193635] [2021-06-05 22:35:00,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322193635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:00,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026236103] [2021-06-05 22:35:00,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:00,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:00,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:00,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:00,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:00,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:00,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:00,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:00,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:35:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:00,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026236103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:00,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:00,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:00,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416881969] [2021-06-05 22:35:00,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:00,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:00,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:00,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:00,519 INFO L87 Difference]: Start difference. First operand 3793 states and 15903 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:01,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:01,173 INFO L93 Difference]: Finished difference Result 3979 states and 16600 transitions. [2021-06-05 22:35:01,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:35:01,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:01,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:01,181 INFO L225 Difference]: With dead ends: 3979 [2021-06-05 22:35:01,181 INFO L226 Difference]: Without dead ends: 3957 [2021-06-05 22:35:01,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 555.4ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:35:01,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3957 states. [2021-06-05 22:35:01,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3957 to 3797. [2021-06-05 22:35:01,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3797 states, 3796 states have (on average 4.193624868282402) internal successors, (15919), 3796 states have internal predecessors, (15919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 15919 transitions. [2021-06-05 22:35:01,229 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 15919 transitions. Word has length 23 [2021-06-05 22:35:01,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:01,229 INFO L482 AbstractCegarLoop]: Abstraction has 3797 states and 15919 transitions. [2021-06-05 22:35:01,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 15919 transitions. [2021-06-05 22:35:01,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:01,234 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:01,234 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:01,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 22:35:01,435 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:01,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:01,435 INFO L82 PathProgramCache]: Analyzing trace with hash -283952035, now seen corresponding path program 122 times [2021-06-05 22:35:01,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:01,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902690499] [2021-06-05 22:35:01,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:01,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:01,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902690499] [2021-06-05 22:35:01,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902690499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:01,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152824843] [2021-06-05 22:35:01,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:01,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:01,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:01,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:35:01,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:01,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:01,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 46 [2021-06-05 22:35:01,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:01,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:01,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:01,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:37 [2021-06-05 22:35:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:01,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152824843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:01,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:01,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:35:01,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318115606] [2021-06-05 22:35:01,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:35:01,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:01,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:35:01,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:35:01,744 INFO L87 Difference]: Start difference. First operand 3797 states and 15919 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:02,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:02,134 INFO L93 Difference]: Finished difference Result 3954 states and 16507 transitions. [2021-06-05 22:35:02,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:35:02,135 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:02,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:02,142 INFO L225 Difference]: With dead ends: 3954 [2021-06-05 22:35:02,142 INFO L226 Difference]: Without dead ends: 3939 [2021-06-05 22:35:02,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 385.9ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:35:02,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2021-06-05 22:35:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 3789. [2021-06-05 22:35:02,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.19350580781415) internal successors, (15885), 3788 states have internal predecessors, (15885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:02,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15885 transitions. [2021-06-05 22:35:02,196 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15885 transitions. Word has length 23 [2021-06-05 22:35:02,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:02,197 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15885 transitions. [2021-06-05 22:35:02,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:02,197 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15885 transitions. [2021-06-05 22:35:02,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:02,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:02,202 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:02,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2021-06-05 22:35:02,402 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:02,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:02,403 INFO L82 PathProgramCache]: Analyzing trace with hash 276609189, now seen corresponding path program 123 times [2021-06-05 22:35:02,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:02,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365351207] [2021-06-05 22:35:02,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:02,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:02,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365351207] [2021-06-05 22:35:02,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365351207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:02,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499994592] [2021-06-05 22:35:02,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:02,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:35:02,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:02,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:35:02,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:02,693 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:35:02,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 22:35:02,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:35:02,717 INFO L628 ElimStorePlain]: treesize reduction 70, result has 19.5 percent of original size [2021-06-05 22:35:02,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:02,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:17 [2021-06-05 22:35:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:02,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499994592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:02,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:02,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:35:02,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779862173] [2021-06-05 22:35:02,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:35:02,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:02,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:35:02,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:35:02,761 INFO L87 Difference]: Start difference. First operand 3789 states and 15885 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:03,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:03,421 INFO L93 Difference]: Finished difference Result 4225 states and 17591 transitions. [2021-06-05 22:35:03,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:35:03,422 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:03,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:03,430 INFO L225 Difference]: With dead ends: 4225 [2021-06-05 22:35:03,430 INFO L226 Difference]: Without dead ends: 4210 [2021-06-05 22:35:03,430 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 490.7ms TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:35:03,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4210 states. [2021-06-05 22:35:03,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4210 to 3785. [2021-06-05 22:35:03,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3784 states have (on average 4.193710359408033) internal successors, (15869), 3784 states have internal predecessors, (15869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:03,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 15869 transitions. [2021-06-05 22:35:03,480 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 15869 transitions. Word has length 23 [2021-06-05 22:35:03,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:03,480 INFO L482 AbstractCegarLoop]: Abstraction has 3785 states and 15869 transitions. [2021-06-05 22:35:03,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:03,480 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 15869 transitions. [2021-06-05 22:35:03,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:03,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:03,485 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:03,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable603 [2021-06-05 22:35:03,686 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:03,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:03,686 INFO L82 PathProgramCache]: Analyzing trace with hash 948426341, now seen corresponding path program 124 times [2021-06-05 22:35:03,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:03,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417622790] [2021-06-05 22:35:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:03,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:03,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417622790] [2021-06-05 22:35:03,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417622790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:03,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004311432] [2021-06-05 22:35:03,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:03,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:03,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:03,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:03,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:03,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:03,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:35:03,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:03,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:03,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:03,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:35:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:03,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004311432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:03,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:03,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:03,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127300968] [2021-06-05 22:35:03,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:03,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:03,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:03,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:03,978 INFO L87 Difference]: Start difference. First operand 3785 states and 15869 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:04,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:04,516 INFO L93 Difference]: Finished difference Result 4061 states and 16939 transitions. [2021-06-05 22:35:04,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:35:04,516 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:04,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:04,524 INFO L225 Difference]: With dead ends: 4061 [2021-06-05 22:35:04,524 INFO L226 Difference]: Without dead ends: 4046 [2021-06-05 22:35:04,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 425.0ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:35:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2021-06-05 22:35:04,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 3793. [2021-06-05 22:35:04,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 4.193829113924051) internal successors, (15903), 3792 states have internal predecessors, (15903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:04,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 15903 transitions. [2021-06-05 22:35:04,577 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 15903 transitions. Word has length 23 [2021-06-05 22:35:04,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:04,577 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 15903 transitions. [2021-06-05 22:35:04,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:04,577 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 15903 transitions. [2021-06-05 22:35:04,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:04,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:04,582 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:04,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:04,782 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:04,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:04,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1461953193, now seen corresponding path program 125 times [2021-06-05 22:35:04,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:04,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461495913] [2021-06-05 22:35:04,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:04,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:04,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461495913] [2021-06-05 22:35:04,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461495913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:04,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093952756] [2021-06-05 22:35:04,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:04,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:04,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:04,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:04,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:04,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:04,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:04,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:05,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:05,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:05,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:35:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:05,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093952756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:05,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:05,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:05,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436078531] [2021-06-05 22:35:05,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:05,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:05,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:05,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:05,085 INFO L87 Difference]: Start difference. First operand 3793 states and 15903 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:05,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:05,806 INFO L93 Difference]: Finished difference Result 4020 states and 16767 transitions. [2021-06-05 22:35:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:35:05,806 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:05,813 INFO L225 Difference]: With dead ends: 4020 [2021-06-05 22:35:05,813 INFO L226 Difference]: Without dead ends: 3999 [2021-06-05 22:35:05,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 675.6ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:35:05,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2021-06-05 22:35:05,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 3797. [2021-06-05 22:35:05,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3797 states, 3796 states have (on average 4.193624868282402) internal successors, (15919), 3796 states have internal predecessors, (15919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 15919 transitions. [2021-06-05 22:35:05,863 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 15919 transitions. Word has length 23 [2021-06-05 22:35:05,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:05,863 INFO L482 AbstractCegarLoop]: Abstraction has 3797 states and 15919 transitions. [2021-06-05 22:35:05,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:05,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 15919 transitions. [2021-06-05 22:35:05,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:05,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:05,868 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:06,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:06,069 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:06,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:06,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1757302947, now seen corresponding path program 126 times [2021-06-05 22:35:06,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:06,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727350149] [2021-06-05 22:35:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:06,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:06,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727350149] [2021-06-05 22:35:06,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727350149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:06,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685322011] [2021-06-05 22:35:06,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:06,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:35:06,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:06,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:35:06,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:06,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:06,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 22:35:06,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:06,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:06,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:06,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:12 [2021-06-05 22:35:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:06,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685322011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:06,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:06,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:35:06,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983362521] [2021-06-05 22:35:06,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:35:06,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:06,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:35:06,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:35:06,350 INFO L87 Difference]: Start difference. First operand 3797 states and 15919 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:06,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:06,788 INFO L93 Difference]: Finished difference Result 4018 states and 16766 transitions. [2021-06-05 22:35:06,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:35:06,789 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:06,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:06,796 INFO L225 Difference]: With dead ends: 4018 [2021-06-05 22:35:06,796 INFO L226 Difference]: Without dead ends: 4003 [2021-06-05 22:35:06,796 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 384.7ms TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:35:06,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2021-06-05 22:35:06,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 3789. [2021-06-05 22:35:06,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.19350580781415) internal successors, (15885), 3788 states have internal predecessors, (15885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15885 transitions. [2021-06-05 22:35:06,846 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15885 transitions. Word has length 23 [2021-06-05 22:35:06,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:06,846 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15885 transitions. [2021-06-05 22:35:06,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:06,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15885 transitions. [2021-06-05 22:35:06,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:06,851 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:06,851 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:07,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-05 22:35:07,052 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:07,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:07,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1586488015, now seen corresponding path program 127 times [2021-06-05 22:35:07,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:07,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131761624] [2021-06-05 22:35:07,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:07,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:07,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131761624] [2021-06-05 22:35:07,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131761624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:07,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236328647] [2021-06-05 22:35:07,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:07,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:07,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:07,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:07,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:35:07,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:07,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:07,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:07,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:35:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:07,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236328647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:07,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:07,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:07,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722868783] [2021-06-05 22:35:07,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:07,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:07,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:07,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:07,365 INFO L87 Difference]: Start difference. First operand 3789 states and 15885 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:07,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:07,873 INFO L93 Difference]: Finished difference Result 4020 states and 16771 transitions. [2021-06-05 22:35:07,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:35:07,873 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:07,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:07,880 INFO L225 Difference]: With dead ends: 4020 [2021-06-05 22:35:07,880 INFO L226 Difference]: Without dead ends: 4005 [2021-06-05 22:35:07,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 433.2ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:35:07,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4005 states. [2021-06-05 22:35:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4005 to 3783. [2021-06-05 22:35:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.193812797461661) internal successors, (15861), 3782 states have internal predecessors, (15861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15861 transitions. [2021-06-05 22:35:07,930 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15861 transitions. Word has length 23 [2021-06-05 22:35:07,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:07,930 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15861 transitions. [2021-06-05 22:35:07,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:07,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15861 transitions. [2021-06-05 22:35:07,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:07,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:07,935 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:08,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:08,135 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:08,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:08,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1604229199, now seen corresponding path program 128 times [2021-06-05 22:35:08,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:08,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230191463] [2021-06-05 22:35:08,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:08,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:08,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230191463] [2021-06-05 22:35:08,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230191463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:08,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732618353] [2021-06-05 22:35:08,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:08,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:08,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:08,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:08,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:08,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:08,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:35:08,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:08,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:08,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:08,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:35:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:08,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732618353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:08,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:08,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:08,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870480962] [2021-06-05 22:35:08,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:08,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:08,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:08,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:08,437 INFO L87 Difference]: Start difference. First operand 3783 states and 15861 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:09,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:09,061 INFO L93 Difference]: Finished difference Result 4101 states and 17095 transitions. [2021-06-05 22:35:09,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:35:09,061 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:09,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:09,068 INFO L225 Difference]: With dead ends: 4101 [2021-06-05 22:35:09,068 INFO L226 Difference]: Without dead ends: 4086 [2021-06-05 22:35:09,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 485.5ms TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:35:09,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-06-05 22:35:09,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 3788. [2021-06-05 22:35:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.193556905202007) internal successors, (15881), 3787 states have internal predecessors, (15881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:09,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15881 transitions. [2021-06-05 22:35:09,118 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15881 transitions. Word has length 23 [2021-06-05 22:35:09,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:09,118 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15881 transitions. [2021-06-05 22:35:09,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:09,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15881 transitions. [2021-06-05 22:35:09,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:09,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:09,123 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:09,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable616 [2021-06-05 22:35:09,323 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:09,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:09,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1182294931, now seen corresponding path program 129 times [2021-06-05 22:35:09,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:09,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954761891] [2021-06-05 22:35:09,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:09,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:09,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954761891] [2021-06-05 22:35:09,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954761891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:09,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549903165] [2021-06-05 22:35:09,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:09,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:35:09,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:09,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:35:09,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:09,581 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:35:09,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 22:35:09,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:35:09,603 INFO L628 ElimStorePlain]: treesize reduction 70, result has 16.7 percent of original size [2021-06-05 22:35:09,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:09,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 22:35:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:09,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549903165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:09,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:09,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:35:09,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300914078] [2021-06-05 22:35:09,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:35:09,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:09,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:35:09,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:35:09,645 INFO L87 Difference]: Start difference. First operand 3788 states and 15881 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:10,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:10,364 INFO L93 Difference]: Finished difference Result 4353 states and 18101 transitions. [2021-06-05 22:35:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:35:10,364 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:10,372 INFO L225 Difference]: With dead ends: 4353 [2021-06-05 22:35:10,372 INFO L226 Difference]: Without dead ends: 4338 [2021-06-05 22:35:10,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 523.1ms TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:35:10,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4338 states. [2021-06-05 22:35:10,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4338 to 3796. [2021-06-05 22:35:10,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.1936758893280635) internal successors, (15915), 3795 states have internal predecessors, (15915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:10,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15915 transitions. [2021-06-05 22:35:10,423 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15915 transitions. Word has length 23 [2021-06-05 22:35:10,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:10,423 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15915 transitions. [2021-06-05 22:35:10,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15915 transitions. [2021-06-05 22:35:10,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:10,428 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:10,428 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:10,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:10,629 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:10,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:10,629 INFO L82 PathProgramCache]: Analyzing trace with hash 276133971, now seen corresponding path program 130 times [2021-06-05 22:35:10,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:10,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508749140] [2021-06-05 22:35:10,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:10,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:10,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508749140] [2021-06-05 22:35:10,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508749140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:10,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754170264] [2021-06-05 22:35:10,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:10,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:10,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:10,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:10,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:10,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:10,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:10,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:10,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:10,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:10,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:35:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:10,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754170264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:10,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:10,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:10,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479277864] [2021-06-05 22:35:10,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:10,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:10,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:10,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:10,946 INFO L87 Difference]: Start difference. First operand 3796 states and 15915 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:11,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:11,773 INFO L93 Difference]: Finished difference Result 4123 states and 17177 transitions. [2021-06-05 22:35:11,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:35:11,774 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:11,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:11,781 INFO L225 Difference]: With dead ends: 4123 [2021-06-05 22:35:11,781 INFO L226 Difference]: Without dead ends: 4102 [2021-06-05 22:35:11,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 725.4ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:35:11,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2021-06-05 22:35:11,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 3800. [2021-06-05 22:35:11,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.193471966306923) internal successors, (15931), 3799 states have internal predecessors, (15931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15931 transitions. [2021-06-05 22:35:11,835 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15931 transitions. Word has length 23 [2021-06-05 22:35:11,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:11,835 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15931 transitions. [2021-06-05 22:35:11,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:11,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15931 transitions. [2021-06-05 22:35:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:11,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:11,841 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:12,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-06-05 22:35:12,041 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:12,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:12,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1351845127, now seen corresponding path program 131 times [2021-06-05 22:35:12,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:12,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10809702] [2021-06-05 22:35:12,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:12,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:12,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10809702] [2021-06-05 22:35:12,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10809702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:12,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922155720] [2021-06-05 22:35:12,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:12,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:35:12,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:12,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:12,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:12,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:12,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:12,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:12,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:12,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:12,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:35:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:12,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922155720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:12,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:12,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:12,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948839735] [2021-06-05 22:35:12,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:12,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:12,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:12,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:12,354 INFO L87 Difference]: Start difference. First operand 3800 states and 15931 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:13,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:13,318 INFO L93 Difference]: Finished difference Result 4124 states and 17193 transitions. [2021-06-05 22:35:13,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:35:13,319 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:13,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:13,326 INFO L225 Difference]: With dead ends: 4124 [2021-06-05 22:35:13,326 INFO L226 Difference]: Without dead ends: 4109 [2021-06-05 22:35:13,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 794.1ms TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:35:13,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4109 states. [2021-06-05 22:35:13,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4109 to 3792. [2021-06-05 22:35:13,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.193352677393827) internal successors, (15897), 3791 states have internal predecessors, (15897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:13,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15897 transitions. [2021-06-05 22:35:13,375 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15897 transitions. Word has length 23 [2021-06-05 22:35:13,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:13,375 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15897 transitions. [2021-06-05 22:35:13,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:13,376 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15897 transitions. [2021-06-05 22:35:13,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:13,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:13,381 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:13,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-05 22:35:13,581 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:13,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:13,581 INFO L82 PathProgramCache]: Analyzing trace with hash -146402489, now seen corresponding path program 132 times [2021-06-05 22:35:13,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:13,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987682304] [2021-06-05 22:35:13,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:13,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:13,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987682304] [2021-06-05 22:35:13,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987682304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:13,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574327085] [2021-06-05 22:35:13,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:13,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:35:13,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:13,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:13,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:13,839 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:35:13,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 22:35:13,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:35:13,862 INFO L628 ElimStorePlain]: treesize reduction 55, result has 20.3 percent of original size [2021-06-05 22:35:13,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:13,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 22:35:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:13,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574327085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:13,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:13,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:35:13,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014568517] [2021-06-05 22:35:13,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:35:13,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:13,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:35:13,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:35:13,905 INFO L87 Difference]: Start difference. First operand 3792 states and 15897 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:14,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:14,585 INFO L93 Difference]: Finished difference Result 4163 states and 17343 transitions. [2021-06-05 22:35:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:35:14,586 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:14,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:14,593 INFO L225 Difference]: With dead ends: 4163 [2021-06-05 22:35:14,593 INFO L226 Difference]: Without dead ends: 4148 [2021-06-05 22:35:14,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 454.7ms TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:35:14,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4148 states. [2021-06-05 22:35:14,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4148 to 3784. [2021-06-05 22:35:14,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3784 states, 3783 states have (on average 4.193232883954534) internal successors, (15863), 3783 states have internal predecessors, (15863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:14,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 15863 transitions. [2021-06-05 22:35:14,643 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 15863 transitions. Word has length 23 [2021-06-05 22:35:14,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:14,643 INFO L482 AbstractCegarLoop]: Abstraction has 3784 states and 15863 transitions. [2021-06-05 22:35:14,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:14,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 15863 transitions. [2021-06-05 22:35:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:14,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:14,672 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:14,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:14,872 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:14,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:14,873 INFO L82 PathProgramCache]: Analyzing trace with hash 3943545, now seen corresponding path program 133 times [2021-06-05 22:35:14,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:14,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71055522] [2021-06-05 22:35:14,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:14,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:14,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71055522] [2021-06-05 22:35:14,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71055522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:14,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280628024] [2021-06-05 22:35:14,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:14,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:14,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:15,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:15,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:35:15,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:15,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:15,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:15,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:35:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:15,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280628024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:15,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:15,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:15,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153876947] [2021-06-05 22:35:15,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:15,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:15,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:15,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:15,165 INFO L87 Difference]: Start difference. First operand 3784 states and 15863 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:16,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:16,047 INFO L93 Difference]: Finished difference Result 4544 states and 18861 transitions. [2021-06-05 22:35:16,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:35:16,047 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:16,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:16,055 INFO L225 Difference]: With dead ends: 4544 [2021-06-05 22:35:16,055 INFO L226 Difference]: Without dead ends: 4522 [2021-06-05 22:35:16,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 547.0ms TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:35:16,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4522 states. [2021-06-05 22:35:16,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4522 to 3796. [2021-06-05 22:35:16,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.194729907773386) internal successors, (15919), 3795 states have internal predecessors, (15919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:16,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15919 transitions. [2021-06-05 22:35:16,107 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15919 transitions. Word has length 23 [2021-06-05 22:35:16,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:16,107 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15919 transitions. [2021-06-05 22:35:16,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:16,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15919 transitions. [2021-06-05 22:35:16,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:16,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:16,112 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:16,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 22:35:16,312 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:16,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:16,313 INFO L82 PathProgramCache]: Analyzing trace with hash -902217415, now seen corresponding path program 134 times [2021-06-05 22:35:16,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:16,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423762084] [2021-06-05 22:35:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:16,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:16,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423762084] [2021-06-05 22:35:16,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423762084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:16,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620327786] [2021-06-05 22:35:16,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:16,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:16,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:16,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:16,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:16,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:16,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:16,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:16,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:16,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:16,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:35:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:16,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620327786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:16,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:16,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:16,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629085217] [2021-06-05 22:35:16,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:16,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:16,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:16,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:16,604 INFO L87 Difference]: Start difference. First operand 3796 states and 15919 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:17,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:17,403 INFO L93 Difference]: Finished difference Result 4393 states and 18248 transitions. [2021-06-05 22:35:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:35:17,404 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:17,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:17,413 INFO L225 Difference]: With dead ends: 4393 [2021-06-05 22:35:17,413 INFO L226 Difference]: Without dead ends: 4368 [2021-06-05 22:35:17,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 699.8ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:35:17,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4368 states. [2021-06-05 22:35:17,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4368 to 3800. [2021-06-05 22:35:17,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.1945248749670965) internal successors, (15935), 3799 states have internal predecessors, (15935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:17,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15935 transitions. [2021-06-05 22:35:17,478 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15935 transitions. Word has length 23 [2021-06-05 22:35:17,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:17,478 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15935 transitions. [2021-06-05 22:35:17,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:17,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15935 transitions. [2021-06-05 22:35:17,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:17,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:17,483 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:17,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:17,684 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:17,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:17,684 INFO L82 PathProgramCache]: Analyzing trace with hash 173493741, now seen corresponding path program 135 times [2021-06-05 22:35:17,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:17,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013645218] [2021-06-05 22:35:17,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:17,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:17,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013645218] [2021-06-05 22:35:17,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013645218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:17,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905854439] [2021-06-05 22:35:17,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:17,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:35:17,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:17,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:17,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:17,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:17,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:17,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:17,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:17,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:17,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:35:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:17,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905854439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:17,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:17,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:17,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346700923] [2021-06-05 22:35:17,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:17,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:17,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:17,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:17,979 INFO L87 Difference]: Start difference. First operand 3800 states and 15935 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:18,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:18,936 INFO L93 Difference]: Finished difference Result 4379 states and 18199 transitions. [2021-06-05 22:35:18,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:35:18,936 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:18,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:18,945 INFO L225 Difference]: With dead ends: 4379 [2021-06-05 22:35:18,945 INFO L226 Difference]: Without dead ends: 4358 [2021-06-05 22:35:18,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 694.8ms TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:35:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4358 states. [2021-06-05 22:35:18,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4358 to 3792. [2021-06-05 22:35:18,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.194407807966236) internal successors, (15901), 3791 states have internal predecessors, (15901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15901 transitions. [2021-06-05 22:35:19,000 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15901 transitions. Word has length 23 [2021-06-05 22:35:19,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:19,000 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15901 transitions. [2021-06-05 22:35:19,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:19,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15901 transitions. [2021-06-05 22:35:19,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:19,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:19,005 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:19,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-06-05 22:35:19,206 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:19,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:19,206 INFO L82 PathProgramCache]: Analyzing trace with hash -161265317, now seen corresponding path program 136 times [2021-06-05 22:35:19,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:19,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306350554] [2021-06-05 22:35:19,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:19,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:19,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306350554] [2021-06-05 22:35:19,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306350554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:19,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158587787] [2021-06-05 22:35:19,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:19,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:19,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:19,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:19,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:19,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:19,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:35:19,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:19,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:19,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:19,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:35:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:19,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158587787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:19,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:19,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:19,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306767946] [2021-06-05 22:35:19,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:19,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:19,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:19,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:19,517 INFO L87 Difference]: Start difference. First operand 3792 states and 15901 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:20,322 INFO L93 Difference]: Finished difference Result 4644 states and 19238 transitions. [2021-06-05 22:35:20,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:35:20,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:20,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:20,330 INFO L225 Difference]: With dead ends: 4644 [2021-06-05 22:35:20,330 INFO L226 Difference]: Without dead ends: 4613 [2021-06-05 22:35:20,330 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 601.4ms TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:35:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-06-05 22:35:20,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 3796. [2021-06-05 22:35:20,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.194729907773386) internal successors, (15919), 3795 states have internal predecessors, (15919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:20,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15919 transitions. [2021-06-05 22:35:20,384 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15919 transitions. Word has length 23 [2021-06-05 22:35:20,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:20,384 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15919 transitions. [2021-06-05 22:35:20,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:20,384 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15919 transitions. [2021-06-05 22:35:20,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:20,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:20,389 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:20,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:20,590 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:20,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:20,590 INFO L82 PathProgramCache]: Analyzing trace with hash 426480005, now seen corresponding path program 137 times [2021-06-05 22:35:20,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:20,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760824670] [2021-06-05 22:35:20,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:20,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:20,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760824670] [2021-06-05 22:35:20,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760824670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:20,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152458529] [2021-06-05 22:35:20,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:20,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:35:20,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:20,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:35:20,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:20,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:20,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 22:35:20,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:20,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:20,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:20,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:12 [2021-06-05 22:35:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:20,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152458529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:20,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:20,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:35:20,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085108557] [2021-06-05 22:35:20,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:35:20,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:20,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:35:20,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:35:20,870 INFO L87 Difference]: Start difference. First operand 3796 states and 15919 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:21,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:21,373 INFO L93 Difference]: Finished difference Result 4358 states and 18111 transitions. [2021-06-05 22:35:21,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:35:21,373 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:21,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:21,381 INFO L225 Difference]: With dead ends: 4358 [2021-06-05 22:35:21,381 INFO L226 Difference]: Without dead ends: 4333 [2021-06-05 22:35:21,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 340.3ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:35:21,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-06-05 22:35:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3800. [2021-06-05 22:35:21,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.1945248749670965) internal successors, (15935), 3799 states have internal predecessors, (15935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:21,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15935 transitions. [2021-06-05 22:35:21,430 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15935 transitions. Word has length 23 [2021-06-05 22:35:21,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:21,431 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15935 transitions. [2021-06-05 22:35:21,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:21,431 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15935 transitions. [2021-06-05 22:35:21,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:21,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:21,436 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:21,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable638 [2021-06-05 22:35:21,636 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:21,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:21,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1502191161, now seen corresponding path program 138 times [2021-06-05 22:35:21,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:21,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958649290] [2021-06-05 22:35:21,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:21,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:21,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958649290] [2021-06-05 22:35:21,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958649290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:21,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11905926] [2021-06-05 22:35:21,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:21,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:35:21,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:21,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:21,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:21,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:21,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:21,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:21,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:21,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:21,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:35:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:21,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11905926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:21,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:21,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:21,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138118109] [2021-06-05 22:35:21,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:21,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:21,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:21,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:21,957 INFO L87 Difference]: Start difference. First operand 3800 states and 15935 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:22,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:22,859 INFO L93 Difference]: Finished difference Result 4380 states and 18199 transitions. [2021-06-05 22:35:22,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:35:22,859 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:22,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:22,867 INFO L225 Difference]: With dead ends: 4380 [2021-06-05 22:35:22,867 INFO L226 Difference]: Without dead ends: 4359 [2021-06-05 22:35:22,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 692.6ms TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:35:22,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4359 states. [2021-06-05 22:35:22,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4359 to 3788. [2021-06-05 22:35:22,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.193556905202007) internal successors, (15881), 3787 states have internal predecessors, (15881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:22,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15881 transitions. [2021-06-05 22:35:22,918 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15881 transitions. Word has length 23 [2021-06-05 22:35:22,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:22,918 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15881 transitions. [2021-06-05 22:35:22,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:22,918 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15881 transitions. [2021-06-05 22:35:22,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:22,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:22,923 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:23,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-05 22:35:23,123 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:23,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:23,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2108485085, now seen corresponding path program 139 times [2021-06-05 22:35:23,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:23,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796231304] [2021-06-05 22:35:23,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:23,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:23,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796231304] [2021-06-05 22:35:23,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796231304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:23,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554810498] [2021-06-05 22:35:23,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:23,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:23,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:23,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:23,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:35:23,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:23,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:23,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:23,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:35:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:23,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554810498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:23,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:23,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:23,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622281795] [2021-06-05 22:35:23,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:23,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:23,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:23,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:23,423 INFO L87 Difference]: Start difference. First operand 3788 states and 15881 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:24,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:24,077 INFO L93 Difference]: Finished difference Result 4286 states and 17831 transitions. [2021-06-05 22:35:24,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:35:24,078 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:24,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:24,085 INFO L225 Difference]: With dead ends: 4286 [2021-06-05 22:35:24,085 INFO L226 Difference]: Without dead ends: 4264 [2021-06-05 22:35:24,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 500.5ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:35:24,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2021-06-05 22:35:24,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 3796. [2021-06-05 22:35:24,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.1936758893280635) internal successors, (15915), 3795 states have internal predecessors, (15915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15915 transitions. [2021-06-05 22:35:24,155 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15915 transitions. Word has length 23 [2021-06-05 22:35:24,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:24,155 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15915 transitions. [2021-06-05 22:35:24,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:24,155 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15915 transitions. [2021-06-05 22:35:24,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:24,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:24,160 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:24,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-06-05 22:35:24,361 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:24,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1280321251, now seen corresponding path program 140 times [2021-06-05 22:35:24,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:24,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307087108] [2021-06-05 22:35:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:24,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:24,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307087108] [2021-06-05 22:35:24,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307087108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:24,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640666468] [2021-06-05 22:35:24,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:24,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:24,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:24,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:24,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:24,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:24,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:24,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:24,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:24,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:24,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:35:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:24,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640666468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:24,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:24,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:24,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264218977] [2021-06-05 22:35:24,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:24,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:24,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:24,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:24,657 INFO L87 Difference]: Start difference. First operand 3796 states and 15915 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:25,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:25,523 INFO L93 Difference]: Finished difference Result 4194 states and 17454 transitions. [2021-06-05 22:35:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:35:25,523 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:25,531 INFO L225 Difference]: With dead ends: 4194 [2021-06-05 22:35:25,531 INFO L226 Difference]: Without dead ends: 4169 [2021-06-05 22:35:25,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 666.0ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:35:25,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2021-06-05 22:35:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 3800. [2021-06-05 22:35:25,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.193471966306923) internal successors, (15931), 3799 states have internal predecessors, (15931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15931 transitions. [2021-06-05 22:35:25,582 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15931 transitions. Word has length 23 [2021-06-05 22:35:25,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:25,582 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15931 transitions. [2021-06-05 22:35:25,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:25,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15931 transitions. [2021-06-05 22:35:25,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:25,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:25,587 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:25,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:25,787 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:25,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:25,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1938934889, now seen corresponding path program 141 times [2021-06-05 22:35:25,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:25,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110737086] [2021-06-05 22:35:25,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:25,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:25,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110737086] [2021-06-05 22:35:25,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110737086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:25,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604569056] [2021-06-05 22:35:25,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:25,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:35:25,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:25,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:35:25,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:25,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:26,018 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:35:26,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 61 [2021-06-05 22:35:26,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:26,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:26,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:26,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:48 [2021-06-05 22:35:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:26,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604569056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:26,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:26,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:35:26,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733552551] [2021-06-05 22:35:26,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:35:26,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:26,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:35:26,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:35:26,121 INFO L87 Difference]: Start difference. First operand 3800 states and 15931 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:26,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:26,928 INFO L93 Difference]: Finished difference Result 4276 states and 17781 transitions. [2021-06-05 22:35:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:35:26,928 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:26,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:26,936 INFO L225 Difference]: With dead ends: 4276 [2021-06-05 22:35:26,936 INFO L226 Difference]: Without dead ends: 4255 [2021-06-05 22:35:26,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 657.6ms TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:35:26,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4255 states. [2021-06-05 22:35:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4255 to 3792. [2021-06-05 22:35:26,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.193352677393827) internal successors, (15897), 3791 states have internal predecessors, (15897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:26,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15897 transitions. [2021-06-05 22:35:26,986 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15897 transitions. Word has length 23 [2021-06-05 22:35:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:26,986 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15897 transitions. [2021-06-05 22:35:26,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15897 transitions. [2021-06-05 22:35:26,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:26,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:26,991 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:27,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:27,192 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:27,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:27,192 INFO L82 PathProgramCache]: Analyzing trace with hash 857784791, now seen corresponding path program 142 times [2021-06-05 22:35:27,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:27,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746914535] [2021-06-05 22:35:27,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:27,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:27,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746914535] [2021-06-05 22:35:27,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746914535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:27,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100975188] [2021-06-05 22:35:27,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:27,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:27,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:27,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:27,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:27,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:27,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:35:27,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:27,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:27,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:27,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:35:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:27,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100975188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:27,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:27,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:27,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832606688] [2021-06-05 22:35:27,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:27,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:27,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:27,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:27,472 INFO L87 Difference]: Start difference. First operand 3792 states and 15897 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:28,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:28,050 INFO L93 Difference]: Finished difference Result 4201 states and 17496 transitions. [2021-06-05 22:35:28,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:35:28,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:28,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:28,057 INFO L225 Difference]: With dead ends: 4201 [2021-06-05 22:35:28,057 INFO L226 Difference]: Without dead ends: 4178 [2021-06-05 22:35:28,057 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 467.4ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:35:28,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2021-06-05 22:35:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 3780. [2021-06-05 22:35:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3780 states, 3779 states have (on average 4.192378936226515) internal successors, (15843), 3779 states have internal predecessors, (15843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:28,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3780 states to 3780 states and 15843 transitions. [2021-06-05 22:35:28,107 INFO L78 Accepts]: Start accepts. Automaton has 3780 states and 15843 transitions. Word has length 23 [2021-06-05 22:35:28,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:28,107 INFO L482 AbstractCegarLoop]: Abstraction has 3780 states and 15843 transitions. [2021-06-05 22:35:28,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:28,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3780 states and 15843 transitions. [2021-06-05 22:35:28,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:28,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:28,112 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:28,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-06-05 22:35:28,319 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:28,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:28,319 INFO L82 PathProgramCache]: Analyzing trace with hash 833044733, now seen corresponding path program 143 times [2021-06-05 22:35:28,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:28,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029410019] [2021-06-05 22:35:28,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:28,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:28,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029410019] [2021-06-05 22:35:28,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029410019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:28,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714494909] [2021-06-05 22:35:28,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:28,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:35:28,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:28,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:28,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:28,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:28,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:35:28,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:28,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:28,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:28,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:35:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:28,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714494909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:28,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:28,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:28,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404496255] [2021-06-05 22:35:28,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:28,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:28,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:28,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:28,614 INFO L87 Difference]: Start difference. First operand 3780 states and 15843 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:29,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:29,145 INFO L93 Difference]: Finished difference Result 4130 states and 17208 transitions. [2021-06-05 22:35:29,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:35:29,145 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:29,152 INFO L225 Difference]: With dead ends: 4130 [2021-06-05 22:35:29,152 INFO L226 Difference]: Without dead ends: 4108 [2021-06-05 22:35:29,152 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 438.1ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:35:29,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4108 states. [2021-06-05 22:35:29,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4108 to 3786. [2021-06-05 22:35:29,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3786 states, 3785 states have (on average 4.192866578599736) internal successors, (15870), 3785 states have internal predecessors, (15870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:29,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3786 states to 3786 states and 15870 transitions. [2021-06-05 22:35:29,202 INFO L78 Accepts]: Start accepts. Automaton has 3786 states and 15870 transitions. Word has length 23 [2021-06-05 22:35:29,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:29,202 INFO L482 AbstractCegarLoop]: Abstraction has 3786 states and 15870 transitions. [2021-06-05 22:35:29,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:29,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3786 states and 15870 transitions. [2021-06-05 22:35:29,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:29,207 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:29,207 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:29,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-06-05 22:35:29,407 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:29,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:29,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1418378685, now seen corresponding path program 144 times [2021-06-05 22:35:29,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:29,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206685403] [2021-06-05 22:35:29,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:29,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:29,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206685403] [2021-06-05 22:35:29,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206685403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:29,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945193213] [2021-06-05 22:35:29,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:29,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:35:29,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:29,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:29,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:29,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:29,639 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:35:29,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:35:29,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:29,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:29,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:29,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 22:35:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:29,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945193213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:29,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:29,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:35:29,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642037327] [2021-06-05 22:35:29,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:35:29,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:29,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:35:29,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:35:29,734 INFO L87 Difference]: Start difference. First operand 3786 states and 15870 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:30,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:30,324 INFO L93 Difference]: Finished difference Result 4176 states and 17375 transitions. [2021-06-05 22:35:30,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:35:30,324 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:30,331 INFO L225 Difference]: With dead ends: 4176 [2021-06-05 22:35:30,331 INFO L226 Difference]: Without dead ends: 4150 [2021-06-05 22:35:30,331 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 506.1ms TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:35:30,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2021-06-05 22:35:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 3790. [2021-06-05 22:35:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3789 states have (on average 4.192662971760359) internal successors, (15886), 3789 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 15886 transitions. [2021-06-05 22:35:30,381 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 15886 transitions. Word has length 23 [2021-06-05 22:35:30,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:30,381 INFO L482 AbstractCegarLoop]: Abstraction has 3790 states and 15886 transitions. [2021-06-05 22:35:30,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:30,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 15886 transitions. [2021-06-05 22:35:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:30,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:30,386 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:30,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:30,587 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:30,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1263021877, now seen corresponding path program 145 times [2021-06-05 22:35:30,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:30,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102872935] [2021-06-05 22:35:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:30,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:30,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102872935] [2021-06-05 22:35:30,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102872935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:30,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094223292] [2021-06-05 22:35:30,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:30,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:30,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:30,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:30,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:30,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:30,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:30,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:30,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:35:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:30,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094223292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:30,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:30,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:30,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344183313] [2021-06-05 22:35:30,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:30,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:30,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:30,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:30,883 INFO L87 Difference]: Start difference. First operand 3790 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:31,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:31,418 INFO L93 Difference]: Finished difference Result 4066 states and 16938 transitions. [2021-06-05 22:35:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:35:31,419 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:31,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:31,426 INFO L225 Difference]: With dead ends: 4066 [2021-06-05 22:35:31,426 INFO L226 Difference]: Without dead ends: 4045 [2021-06-05 22:35:31,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 474.6ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:35:31,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4045 states. [2021-06-05 22:35:31,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4045 to 3782. [2021-06-05 22:35:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3782 states, 3781 states have (on average 4.192541655646655) internal successors, (15852), 3781 states have internal predecessors, (15852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3782 states to 3782 states and 15852 transitions. [2021-06-05 22:35:31,478 INFO L78 Accepts]: Start accepts. Automaton has 3782 states and 15852 transitions. Word has length 23 [2021-06-05 22:35:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:31,478 INFO L482 AbstractCegarLoop]: Abstraction has 3782 states and 15852 transitions. [2021-06-05 22:35:31,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:31,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3782 states and 15852 transitions. [2021-06-05 22:35:31,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:31,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:31,483 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:31,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable659 [2021-06-05 22:35:31,684 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:31,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:31,684 INFO L82 PathProgramCache]: Analyzing trace with hash 605823353, now seen corresponding path program 146 times [2021-06-05 22:35:31,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:31,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908122125] [2021-06-05 22:35:31,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:31,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:31,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908122125] [2021-06-05 22:35:31,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908122125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:31,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798033886] [2021-06-05 22:35:31,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:31,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:31,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:31,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:31,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:31,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:31,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:35:31,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:31,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:31,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:31,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:35:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:31,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798033886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:31,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:31,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:31,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518110615] [2021-06-05 22:35:31,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:31,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:31,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:31,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:31,977 INFO L87 Difference]: Start difference. First operand 3782 states and 15852 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:32,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:32,625 INFO L93 Difference]: Finished difference Result 4296 states and 17871 transitions. [2021-06-05 22:35:32,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:35:32,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:32,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:32,633 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 22:35:32,633 INFO L226 Difference]: Without dead ends: 4274 [2021-06-05 22:35:32,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 440.0ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:35:32,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4274 states. [2021-06-05 22:35:32,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4274 to 3790. [2021-06-05 22:35:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3789 states have (on average 4.192926893639482) internal successors, (15887), 3789 states have internal predecessors, (15887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:32,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 15887 transitions. [2021-06-05 22:35:32,682 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 15887 transitions. Word has length 23 [2021-06-05 22:35:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:32,682 INFO L482 AbstractCegarLoop]: Abstraction has 3790 states and 15887 transitions. [2021-06-05 22:35:32,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:32,682 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 15887 transitions. [2021-06-05 22:35:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:32,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:32,687 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:32,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable661,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:32,888 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:32,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:32,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1119350205, now seen corresponding path program 147 times [2021-06-05 22:35:32,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:32,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440253637] [2021-06-05 22:35:32,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:32,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:32,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440253637] [2021-06-05 22:35:32,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440253637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:32,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064663712] [2021-06-05 22:35:32,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:33,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:35:33,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:33,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:33,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:33,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:33,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:33,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:33,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:33,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:33,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:35:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:33,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064663712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:33,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:33,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:33,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064112105] [2021-06-05 22:35:33,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:33,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:33,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:33,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:33,190 INFO L87 Difference]: Start difference. First operand 3790 states and 15887 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:33,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:33,929 INFO L93 Difference]: Finished difference Result 4158 states and 17313 transitions. [2021-06-05 22:35:33,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:35:33,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:33,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:33,937 INFO L225 Difference]: With dead ends: 4158 [2021-06-05 22:35:33,937 INFO L226 Difference]: Without dead ends: 4133 [2021-06-05 22:35:33,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 637.3ms TimeCoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:35:33,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2021-06-05 22:35:33,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 3794. [2021-06-05 22:35:33,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.192723437911943) internal successors, (15903), 3793 states have internal predecessors, (15903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:33,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15903 transitions. [2021-06-05 22:35:33,986 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15903 transitions. Word has length 23 [2021-06-05 22:35:33,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:33,986 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15903 transitions. [2021-06-05 22:35:33,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:33,986 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15903 transitions. [2021-06-05 22:35:33,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:33,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:33,991 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:34,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-06-05 22:35:34,192 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:34,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:34,192 INFO L82 PathProgramCache]: Analyzing trace with hash -2099905935, now seen corresponding path program 148 times [2021-06-05 22:35:34,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:34,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322592084] [2021-06-05 22:35:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:34,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:34,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322592084] [2021-06-05 22:35:34,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322592084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:34,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949329821] [2021-06-05 22:35:34,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:34,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:34,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:34,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:34,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:34,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:34,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:34,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:34,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:34,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:34,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:35:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:34,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949329821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:34,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:34,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:34,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397560213] [2021-06-05 22:35:34,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:34,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:34,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:34,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:34,496 INFO L87 Difference]: Start difference. First operand 3794 states and 15903 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:35,272 INFO L93 Difference]: Finished difference Result 4162 states and 17329 transitions. [2021-06-05 22:35:35,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:35:35,272 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:35,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:35,279 INFO L225 Difference]: With dead ends: 4162 [2021-06-05 22:35:35,279 INFO L226 Difference]: Without dead ends: 4141 [2021-06-05 22:35:35,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 632.9ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:35:35,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2021-06-05 22:35:35,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3786. [2021-06-05 22:35:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3786 states, 3785 states have (on average 4.192602377807133) internal successors, (15869), 3785 states have internal predecessors, (15869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3786 states to 3786 states and 15869 transitions. [2021-06-05 22:35:35,330 INFO L78 Accepts]: Start accepts. Automaton has 3786 states and 15869 transitions. Word has length 23 [2021-06-05 22:35:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:35,330 INFO L482 AbstractCegarLoop]: Abstraction has 3786 states and 15869 transitions. [2021-06-05 22:35:35,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3786 states and 15869 transitions. [2021-06-05 22:35:35,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:35,335 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:35,335 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:35,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:35,535 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:35,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:35,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1818910083, now seen corresponding path program 149 times [2021-06-05 22:35:35,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:35,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049498796] [2021-06-05 22:35:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:35,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:35,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049498796] [2021-06-05 22:35:35,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049498796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:35,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533699382] [2021-06-05 22:35:35,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:35,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:35:35,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:35,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:35:35,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:35,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:35,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 22:35:35,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:35,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:35,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:35,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 22:35:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:35,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533699382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:35,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:35,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:35:35,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791380801] [2021-06-05 22:35:35,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:35:35,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:35,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:35:35,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:35:35,859 INFO L87 Difference]: Start difference. First operand 3786 states and 15869 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:36,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:36,284 INFO L93 Difference]: Finished difference Result 4022 states and 16771 transitions. [2021-06-05 22:35:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:35:36,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:36,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:36,292 INFO L225 Difference]: With dead ends: 4022 [2021-06-05 22:35:36,292 INFO L226 Difference]: Without dead ends: 3996 [2021-06-05 22:35:36,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 429.0ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:35:36,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3996 states. [2021-06-05 22:35:36,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3996 to 3795. [2021-06-05 22:35:36,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 4.191091196626252) internal successors, (15901), 3794 states have internal predecessors, (15901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:36,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 15901 transitions. [2021-06-05 22:35:36,341 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 15901 transitions. Word has length 23 [2021-06-05 22:35:36,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:36,341 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 15901 transitions. [2021-06-05 22:35:36,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:36,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 15901 transitions. [2021-06-05 22:35:36,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:36,346 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:36,346 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:36,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-06-05 22:35:36,547 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:36,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:36,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1434481145, now seen corresponding path program 150 times [2021-06-05 22:35:36,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:36,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897237136] [2021-06-05 22:35:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:36,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:36,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897237136] [2021-06-05 22:35:36,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897237136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:36,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735658010] [2021-06-05 22:35:36,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:36,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:35:36,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:36,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:35:36,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:36,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:36,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:35:36,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:36,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 22:35:36,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:36,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:36,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:36,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 22:35:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:36,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735658010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:36,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:36,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:36,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990134189] [2021-06-05 22:35:36,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:36,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:36,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:36,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:36,849 INFO L87 Difference]: Start difference. First operand 3795 states and 15901 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:37,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:37,279 INFO L93 Difference]: Finished difference Result 3999 states and 16678 transitions. [2021-06-05 22:35:37,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:35:37,279 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:37,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:37,287 INFO L225 Difference]: With dead ends: 3999 [2021-06-05 22:35:37,287 INFO L226 Difference]: Without dead ends: 3971 [2021-06-05 22:35:37,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 384.4ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:35:37,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-06-05 22:35:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 3788. [2021-06-05 22:35:37,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.192500660153155) internal successors, (15877), 3787 states have internal predecessors, (15877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:37,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15877 transitions. [2021-06-05 22:35:37,336 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15877 transitions. Word has length 23 [2021-06-05 22:35:37,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:37,336 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15877 transitions. [2021-06-05 22:35:37,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:37,337 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15877 transitions. [2021-06-05 22:35:37,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:37,342 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:37,342 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:37,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable670 [2021-06-05 22:35:37,542 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:37,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:37,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1147359793, now seen corresponding path program 151 times [2021-06-05 22:35:37,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:37,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071530206] [2021-06-05 22:35:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:37,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:37,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071530206] [2021-06-05 22:35:37,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071530206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:37,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903940076] [2021-06-05 22:35:37,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:37,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:37,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:37,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:37,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:37,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:37,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:37,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:37,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:35:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:37,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903940076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:37,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:37,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:37,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350057048] [2021-06-05 22:35:37,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:37,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:37,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:37,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:37,856 INFO L87 Difference]: Start difference. First operand 3788 states and 15877 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:38,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:38,407 INFO L93 Difference]: Finished difference Result 4034 states and 16813 transitions. [2021-06-05 22:35:38,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:35:38,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:38,414 INFO L225 Difference]: With dead ends: 4034 [2021-06-05 22:35:38,414 INFO L226 Difference]: Without dead ends: 4008 [2021-06-05 22:35:38,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 534.2ms TimeCoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:35:38,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2021-06-05 22:35:38,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 3792. [2021-06-05 22:35:38,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.192297546821419) internal successors, (15893), 3791 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:38,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15893 transitions. [2021-06-05 22:35:38,463 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15893 transitions. Word has length 23 [2021-06-05 22:35:38,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:38,463 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15893 transitions. [2021-06-05 22:35:38,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:38,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15893 transitions. [2021-06-05 22:35:38,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:38,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:38,468 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:38,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:38,669 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:38,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:38,669 INFO L82 PathProgramCache]: Analyzing trace with hash 654142407, now seen corresponding path program 152 times [2021-06-05 22:35:38,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:38,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057886864] [2021-06-05 22:35:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:38,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:38,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057886864] [2021-06-05 22:35:38,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057886864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:38,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383724959] [2021-06-05 22:35:38,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:38,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:38,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:38,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:38,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:38,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:38,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:38,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:38,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:38,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:38,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:35:38,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:38,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383724959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:38,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:38,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:38,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336412164] [2021-06-05 22:35:38,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:38,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:38,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:38,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:38,987 INFO L87 Difference]: Start difference. First operand 3792 states and 15893 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:39,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:39,413 INFO L93 Difference]: Finished difference Result 4037 states and 16824 transitions. [2021-06-05 22:35:39,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:35:39,413 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:39,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:39,421 INFO L225 Difference]: With dead ends: 4037 [2021-06-05 22:35:39,421 INFO L226 Difference]: Without dead ends: 4016 [2021-06-05 22:35:39,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 431.8ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:35:39,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2021-06-05 22:35:39,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3788. [2021-06-05 22:35:39,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.192500660153155) internal successors, (15877), 3787 states have internal predecessors, (15877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:39,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15877 transitions. [2021-06-05 22:35:39,474 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15877 transitions. Word has length 23 [2021-06-05 22:35:39,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:39,474 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15877 transitions. [2021-06-05 22:35:39,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:39,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15877 transitions. [2021-06-05 22:35:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:39,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:39,480 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:39,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-06-05 22:35:39,680 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:39,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:39,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1588918663, now seen corresponding path program 153 times [2021-06-05 22:35:39,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:39,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260243269] [2021-06-05 22:35:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:39,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:39,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260243269] [2021-06-05 22:35:39,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260243269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:39,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182703664] [2021-06-05 22:35:39,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:39,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:35:39,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:39,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:39,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:39,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:39,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:39,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:39,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:39,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:39,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:35:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:40,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182703664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:40,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:40,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:40,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299737433] [2021-06-05 22:35:40,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:40,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:40,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:40,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:40,005 INFO L87 Difference]: Start difference. First operand 3788 states and 15877 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:40,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:40,524 INFO L93 Difference]: Finished difference Result 4024 states and 16775 transitions. [2021-06-05 22:35:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:35:40,525 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:40,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:40,531 INFO L225 Difference]: With dead ends: 4024 [2021-06-05 22:35:40,531 INFO L226 Difference]: Without dead ends: 3999 [2021-06-05 22:35:40,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 551.8ms TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:35:40,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2021-06-05 22:35:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 3792. [2021-06-05 22:35:40,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.192297546821419) internal successors, (15893), 3791 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:40,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15893 transitions. [2021-06-05 22:35:40,581 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15893 transitions. Word has length 23 [2021-06-05 22:35:40,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:40,581 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15893 transitions. [2021-06-05 22:35:40,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:40,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15893 transitions. [2021-06-05 22:35:40,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:40,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:40,586 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:40,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-05 22:35:40,786 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:40,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:40,786 INFO L82 PathProgramCache]: Analyzing trace with hash 576226131, now seen corresponding path program 154 times [2021-06-05 22:35:40,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:40,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875439635] [2021-06-05 22:35:40,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:40,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:40,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875439635] [2021-06-05 22:35:40,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875439635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:40,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784391700] [2021-06-05 22:35:40,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:40,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:40,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:40,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:40,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:40,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:40,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:40,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:40,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:40,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:40,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:35:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:41,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784391700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:41,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:41,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:41,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856745843] [2021-06-05 22:35:41,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:41,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:41,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:41,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:41,104 INFO L87 Difference]: Start difference. First operand 3792 states and 15893 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:41,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:41,602 INFO L93 Difference]: Finished difference Result 4028 states and 16788 transitions. [2021-06-05 22:35:41,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:35:41,603 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:41,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:41,610 INFO L225 Difference]: With dead ends: 4028 [2021-06-05 22:35:41,610 INFO L226 Difference]: Without dead ends: 4007 [2021-06-05 22:35:41,610 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 519.4ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:35:41,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-06-05 22:35:41,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3784. [2021-06-05 22:35:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3784 states, 3783 states have (on average 4.1924398625429555) internal successors, (15860), 3783 states have internal predecessors, (15860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 15860 transitions. [2021-06-05 22:35:41,659 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 15860 transitions. Word has length 23 [2021-06-05 22:35:41,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:41,659 INFO L482 AbstractCegarLoop]: Abstraction has 3784 states and 15860 transitions. [2021-06-05 22:35:41,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:41,659 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 15860 transitions. [2021-06-05 22:35:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:41,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:41,664 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:41,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-06-05 22:35:41,864 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:41,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:41,865 INFO L82 PathProgramCache]: Analyzing trace with hash -242799119, now seen corresponding path program 155 times [2021-06-05 22:35:41,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:41,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462911527] [2021-06-05 22:35:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:41,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:41,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462911527] [2021-06-05 22:35:41,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462911527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:41,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036077856] [2021-06-05 22:35:41,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:41,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:35:41,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:41,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:41,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:42,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:42,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:35:42,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:42,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:42,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:42,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:35:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:42,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036077856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:42,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:42,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:42,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987904833] [2021-06-05 22:35:42,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:42,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:42,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:42,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:42,164 INFO L87 Difference]: Start difference. First operand 3784 states and 15860 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:42,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:42,903 INFO L93 Difference]: Finished difference Result 4539 states and 18837 transitions. [2021-06-05 22:35:42,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:35:42,904 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:42,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:42,911 INFO L225 Difference]: With dead ends: 4539 [2021-06-05 22:35:42,911 INFO L226 Difference]: Without dead ends: 4517 [2021-06-05 22:35:42,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 499.1ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:35:42,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2021-06-05 22:35:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 3792. [2021-06-05 22:35:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.19361646003693) internal successors, (15898), 3791 states have internal predecessors, (15898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15898 transitions. [2021-06-05 22:35:42,964 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15898 transitions. Word has length 23 [2021-06-05 22:35:42,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:42,964 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15898 transitions. [2021-06-05 22:35:42,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:42,964 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15898 transitions. [2021-06-05 22:35:42,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:42,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:42,970 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:43,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable679 [2021-06-05 22:35:43,171 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:43,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:43,171 INFO L82 PathProgramCache]: Analyzing trace with hash 270727733, now seen corresponding path program 156 times [2021-06-05 22:35:43,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:43,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082305371] [2021-06-05 22:35:43,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:43,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:43,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082305371] [2021-06-05 22:35:43,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082305371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:43,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532064090] [2021-06-05 22:35:43,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:43,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:35:43,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:43,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:43,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:43,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:43,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:43,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:43,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:43,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:43,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:35:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:43,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532064090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:43,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:43,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:43,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831899689] [2021-06-05 22:35:43,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:43,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:43,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:43,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:43,469 INFO L87 Difference]: Start difference. First operand 3792 states and 15898 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:44,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:44,205 INFO L93 Difference]: Finished difference Result 4351 states and 18079 transitions. [2021-06-05 22:35:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:35:44,206 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:44,213 INFO L225 Difference]: With dead ends: 4351 [2021-06-05 22:35:44,213 INFO L226 Difference]: Without dead ends: 4326 [2021-06-05 22:35:44,213 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 663.8ms TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:35:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-05 22:35:44,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3796. [2021-06-05 22:35:44,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.193412384716733) internal successors, (15914), 3795 states have internal predecessors, (15914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:44,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15914 transitions. [2021-06-05 22:35:44,264 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15914 transitions. Word has length 23 [2021-06-05 22:35:44,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:44,264 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15914 transitions. [2021-06-05 22:35:44,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:44,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15914 transitions. [2021-06-05 22:35:44,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:44,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:44,269 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:44,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:44,470 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:44,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:44,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1346438889, now seen corresponding path program 157 times [2021-06-05 22:35:44,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:44,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769632018] [2021-06-05 22:35:44,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:44,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:44,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769632018] [2021-06-05 22:35:44,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769632018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:44,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129907818] [2021-06-05 22:35:44,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:44,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:44,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:44,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:44,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:44,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:44,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:44,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:44,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:35:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:44,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129907818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:44,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:44,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:44,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077634817] [2021-06-05 22:35:44,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:44,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:44,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:44,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:44,790 INFO L87 Difference]: Start difference. First operand 3796 states and 15914 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:45,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:45,620 INFO L93 Difference]: Finished difference Result 4353 states and 18091 transitions. [2021-06-05 22:35:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:35:45,620 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:45,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:45,628 INFO L225 Difference]: With dead ends: 4353 [2021-06-05 22:35:45,628 INFO L226 Difference]: Without dead ends: 4332 [2021-06-05 22:35:45,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 676.5ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:35:45,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2021-06-05 22:35:45,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 3788. [2021-06-05 22:35:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.193292843939794) internal successors, (15880), 3787 states have internal predecessors, (15880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15880 transitions. [2021-06-05 22:35:45,680 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15880 transitions. Word has length 23 [2021-06-05 22:35:45,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:45,680 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15880 transitions. [2021-06-05 22:35:45,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:45,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15880 transitions. [2021-06-05 22:35:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:45,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:45,685 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:45,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-06-05 22:35:45,885 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:45,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:45,886 INFO L82 PathProgramCache]: Analyzing trace with hash 166708379, now seen corresponding path program 158 times [2021-06-05 22:35:45,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:45,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952952334] [2021-06-05 22:35:45,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:45,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:45,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952952334] [2021-06-05 22:35:45,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952952334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:45,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976236883] [2021-06-05 22:35:45,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:46,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:46,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:46,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:46,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:46,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:46,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:35:46,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:46,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:46,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:46,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:35:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:46,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976236883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:46,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:46,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:46,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632420112] [2021-06-05 22:35:46,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:46,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:46,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:46,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:46,175 INFO L87 Difference]: Start difference. First operand 3788 states and 15880 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:46,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:46,938 INFO L93 Difference]: Finished difference Result 4542 states and 18821 transitions. [2021-06-05 22:35:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:35:46,938 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:46,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:46,946 INFO L225 Difference]: With dead ends: 4542 [2021-06-05 22:35:46,946 INFO L226 Difference]: Without dead ends: 4511 [2021-06-05 22:35:46,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 589.9ms TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:35:46,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-05 22:35:46,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3792. [2021-06-05 22:35:46,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.19361646003693) internal successors, (15898), 3791 states have internal predecessors, (15898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:46,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15898 transitions. [2021-06-05 22:35:46,999 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15898 transitions. Word has length 23 [2021-06-05 22:35:46,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:46,999 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15898 transitions. [2021-06-05 22:35:46,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:46,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15898 transitions. [2021-06-05 22:35:47,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:47,004 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:47,004 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:47,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-06-05 22:35:47,205 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:47,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:47,205 INFO L82 PathProgramCache]: Analyzing trace with hash 754453701, now seen corresponding path program 159 times [2021-06-05 22:35:47,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:47,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487954928] [2021-06-05 22:35:47,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:47,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:47,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487954928] [2021-06-05 22:35:47,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487954928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:47,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082552837] [2021-06-05 22:35:47,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:47,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:35:47,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:47,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:35:47,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:47,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:47,465 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:35:47,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:35:47,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:47,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:47,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:47,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 22:35:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:47,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082552837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:47,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:47,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:35:47,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582469694] [2021-06-05 22:35:47,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:35:47,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:47,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:35:47,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:35:47,575 INFO L87 Difference]: Start difference. First operand 3792 states and 15898 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:48,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:48,592 INFO L93 Difference]: Finished difference Result 4418 states and 18365 transitions. [2021-06-05 22:35:48,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:35:48,592 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:48,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:48,600 INFO L225 Difference]: With dead ends: 4418 [2021-06-05 22:35:48,600 INFO L226 Difference]: Without dead ends: 4393 [2021-06-05 22:35:48,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 726.6ms TimeCoverageRelationStatistics Valid=229, Invalid=1411, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:35:48,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4393 states. [2021-06-05 22:35:48,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4393 to 3804. [2021-06-05 22:35:48,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 4.192216671049172) internal successors, (15943), 3803 states have internal predecessors, (15943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:48,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 15943 transitions. [2021-06-05 22:35:48,651 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 15943 transitions. Word has length 23 [2021-06-05 22:35:48,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:48,651 INFO L482 AbstractCegarLoop]: Abstraction has 3804 states and 15943 transitions. [2021-06-05 22:35:48,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:48,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 15943 transitions. [2021-06-05 22:35:48,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:48,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:48,656 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:48,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-06-05 22:35:48,857 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:48,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:48,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1830164857, now seen corresponding path program 160 times [2021-06-05 22:35:48,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:48,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420358783] [2021-06-05 22:35:48,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:48,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:48,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420358783] [2021-06-05 22:35:48,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420358783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:48,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992142996] [2021-06-05 22:35:48,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:48,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:48,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:48,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:48,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:49,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:49,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:49,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:49,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:49,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:49,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:35:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:49,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992142996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:49,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:49,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:49,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063510239] [2021-06-05 22:35:49,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:49,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:49,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:49,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:49,155 INFO L87 Difference]: Start difference. First operand 3804 states and 15943 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:49,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:49,904 INFO L93 Difference]: Finished difference Result 4380 states and 18184 transitions. [2021-06-05 22:35:49,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:35:49,904 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:49,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:49,912 INFO L225 Difference]: With dead ends: 4380 [2021-06-05 22:35:49,912 INFO L226 Difference]: Without dead ends: 4359 [2021-06-05 22:35:49,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 622.9ms TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:35:49,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4359 states. [2021-06-05 22:35:49,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4359 to 3792. [2021-06-05 22:35:49,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.191242416249011) internal successors, (15889), 3791 states have internal predecessors, (15889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15889 transitions. [2021-06-05 22:35:49,963 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15889 transitions. Word has length 23 [2021-06-05 22:35:49,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:49,964 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15889 transitions. [2021-06-05 22:35:49,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15889 transitions. [2021-06-05 22:35:49,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:49,969 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:49,969 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:50,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:50,169 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:50,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:50,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1566452255, now seen corresponding path program 161 times [2021-06-05 22:35:50,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:50,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632430841] [2021-06-05 22:35:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:50,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:50,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632430841] [2021-06-05 22:35:50,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632430841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:50,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452114440] [2021-06-05 22:35:50,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:50,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:35:50,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:50,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:50,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:50,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:50,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:35:50,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:50,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:50,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:50,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:35:50,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:50,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452114440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:50,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:50,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:50,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521914552] [2021-06-05 22:35:50,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:50,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:50,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:50,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:50,477 INFO L87 Difference]: Start difference. First operand 3792 states and 15889 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:51,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:51,111 INFO L93 Difference]: Finished difference Result 4170 states and 17358 transitions. [2021-06-05 22:35:51,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:35:51,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:51,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:51,119 INFO L225 Difference]: With dead ends: 4170 [2021-06-05 22:35:51,119 INFO L226 Difference]: Without dead ends: 4144 [2021-06-05 22:35:51,119 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 499.2ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:35:51,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-06-05 22:35:51,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 3802. [2021-06-05 22:35:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3802 states, 3801 states have (on average 4.18863456985004) internal successors, (15921), 3801 states have internal predecessors, (15921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:51,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 15921 transitions. [2021-06-05 22:35:51,168 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 15921 transitions. Word has length 23 [2021-06-05 22:35:51,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:51,168 INFO L482 AbstractCegarLoop]: Abstraction has 3802 states and 15921 transitions. [2021-06-05 22:35:51,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:51,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 15921 transitions. [2021-06-05 22:35:51,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:51,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:51,174 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:51,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:51,374 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:51,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:51,374 INFO L82 PathProgramCache]: Analyzing trace with hash 524876187, now seen corresponding path program 162 times [2021-06-05 22:35:51,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:51,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486878106] [2021-06-05 22:35:51,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:51,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:51,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486878106] [2021-06-05 22:35:51,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486878106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:51,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957515865] [2021-06-05 22:35:51,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:51,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:35:51,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:51,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:35:51,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:51,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:51,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 22:35:51,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:51,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:51,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:51,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 22:35:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:51,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957515865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:51,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:51,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:51,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639477485] [2021-06-05 22:35:51,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:51,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:51,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:51,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:51,662 INFO L87 Difference]: Start difference. First operand 3802 states and 15921 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:52,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:52,095 INFO L93 Difference]: Finished difference Result 4038 states and 16829 transitions. [2021-06-05 22:35:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:35:52,095 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:52,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:52,102 INFO L225 Difference]: With dead ends: 4038 [2021-06-05 22:35:52,102 INFO L226 Difference]: Without dead ends: 4010 [2021-06-05 22:35:52,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 370.7ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:35:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2021-06-05 22:35:52,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 3795. [2021-06-05 22:35:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 4.1892461781760675) internal successors, (15894), 3794 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 15894 transitions. [2021-06-05 22:35:52,150 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 15894 transitions. Word has length 23 [2021-06-05 22:35:52,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:52,150 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 15894 transitions. [2021-06-05 22:35:52,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 15894 transitions. [2021-06-05 22:35:52,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:52,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:52,156 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:52,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-06-05 22:35:52,363 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:52,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:52,363 INFO L82 PathProgramCache]: Analyzing trace with hash -360922093, now seen corresponding path program 163 times [2021-06-05 22:35:52,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:52,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15708667] [2021-06-05 22:35:52,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:52,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:52,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15708667] [2021-06-05 22:35:52,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15708667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:52,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305607859] [2021-06-05 22:35:52,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:52,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:52,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:52,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:52,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:35:52,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:52,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:52,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:52,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:35:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:52,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305607859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:52,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:52,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:52,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365074414] [2021-06-05 22:35:52,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:52,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:52,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:52,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:52,663 INFO L87 Difference]: Start difference. First operand 3795 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:53,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:53,052 INFO L93 Difference]: Finished difference Result 4204 states and 17490 transitions. [2021-06-05 22:35:53,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:35:53,052 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:53,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:53,060 INFO L225 Difference]: With dead ends: 4204 [2021-06-05 22:35:53,060 INFO L226 Difference]: Without dead ends: 4170 [2021-06-05 22:35:53,060 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 376.6ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:35:53,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2021-06-05 22:35:53,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 3792. [2021-06-05 22:35:53,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.190451068319705) internal successors, (15886), 3791 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15886 transitions. [2021-06-05 22:35:53,112 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15886 transitions. Word has length 23 [2021-06-05 22:35:53,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:53,112 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15886 transitions. [2021-06-05 22:35:53,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:53,112 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15886 transitions. [2021-06-05 22:35:53,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:53,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:53,117 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:53,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable696 [2021-06-05 22:35:53,318 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:53,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:53,318 INFO L82 PathProgramCache]: Analyzing trace with hash -545976375, now seen corresponding path program 164 times [2021-06-05 22:35:53,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:53,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94598706] [2021-06-05 22:35:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:53,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:53,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94598706] [2021-06-05 22:35:53,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94598706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:53,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85098716] [2021-06-05 22:35:53,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:53,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:53,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:53,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:53,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:53,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:53,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:53,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:53,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:53,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:53,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:35:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:53,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85098716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:53,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:53,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:53,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065919518] [2021-06-05 22:35:53,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:53,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:53,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:53,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:53,642 INFO L87 Difference]: Start difference. First operand 3792 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:54,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:54,286 INFO L93 Difference]: Finished difference Result 4133 states and 17209 transitions. [2021-06-05 22:35:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:35:54,286 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:54,293 INFO L225 Difference]: With dead ends: 4133 [2021-06-05 22:35:54,293 INFO L226 Difference]: Without dead ends: 4107 [2021-06-05 22:35:54,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 521.0ms TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:35:54,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2021-06-05 22:35:54,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3801. [2021-06-05 22:35:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3800 states have (on average 4.1889473684210525) internal successors, (15918), 3800 states have internal predecessors, (15918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 15918 transitions. [2021-06-05 22:35:54,343 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 15918 transitions. Word has length 23 [2021-06-05 22:35:54,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:54,343 INFO L482 AbstractCegarLoop]: Abstraction has 3801 states and 15918 transitions. [2021-06-05 22:35:54,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:54,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 15918 transitions. [2021-06-05 22:35:54,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:54,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:54,348 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:54,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-06-05 22:35:54,549 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:54,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:54,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1587552443, now seen corresponding path program 165 times [2021-06-05 22:35:54,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:54,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295612849] [2021-06-05 22:35:54,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:54,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:54,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295612849] [2021-06-05 22:35:54,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295612849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:54,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752318298] [2021-06-05 22:35:54,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:54,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:35:54,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:54,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:35:54,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:54,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:54,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:35:54,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:54,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 22:35:54,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:54,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:54,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:54,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 22:35:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:54,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752318298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:54,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:54,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:54,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566955177] [2021-06-05 22:35:54,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:54,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:54,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:54,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:54,853 INFO L87 Difference]: Start difference. First operand 3801 states and 15918 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:55,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:55,413 INFO L93 Difference]: Finished difference Result 4050 states and 16875 transitions. [2021-06-05 22:35:55,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:35:55,414 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:55,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:55,421 INFO L225 Difference]: With dead ends: 4050 [2021-06-05 22:35:55,421 INFO L226 Difference]: Without dead ends: 4022 [2021-06-05 22:35:55,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 409.8ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:35:55,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2021-06-05 22:35:55,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 3794. [2021-06-05 22:35:55,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.190350645926707) internal successors, (15894), 3793 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:55,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15894 transitions. [2021-06-05 22:35:55,472 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15894 transitions. Word has length 23 [2021-06-05 22:35:55,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:55,472 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15894 transitions. [2021-06-05 22:35:55,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:55,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15894 transitions. [2021-06-05 22:35:55,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:55,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:55,478 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:55,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable700 [2021-06-05 22:35:55,678 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:55,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:55,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1874673795, now seen corresponding path program 166 times [2021-06-05 22:35:55,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:55,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428009972] [2021-06-05 22:35:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:55,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:55,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428009972] [2021-06-05 22:35:55,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428009972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:55,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17138461] [2021-06-05 22:35:55,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:55,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:55,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:55,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:55,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:55,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:55,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:55,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:55,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:55,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:55,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:35:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:55,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17138461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:55,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:55,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:55,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123648260] [2021-06-05 22:35:55,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:55,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:55,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:55,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:55,994 INFO L87 Difference]: Start difference. First operand 3794 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:56,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:56,565 INFO L93 Difference]: Finished difference Result 4044 states and 16847 transitions. [2021-06-05 22:35:56,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:35:56,565 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:56,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:56,572 INFO L225 Difference]: With dead ends: 4044 [2021-06-05 22:35:56,572 INFO L226 Difference]: Without dead ends: 4018 [2021-06-05 22:35:56,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 507.2ms TimeCoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:35:56,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4018 states. [2021-06-05 22:35:56,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4018 to 3798. [2021-06-05 22:35:56,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 4.190150118514617) internal successors, (15910), 3797 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:56,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 15910 transitions. [2021-06-05 22:35:56,621 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 15910 transitions. Word has length 23 [2021-06-05 22:35:56,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:56,621 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 15910 transitions. [2021-06-05 22:35:56,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 15910 transitions. [2021-06-05 22:35:56,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:56,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:56,626 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:56,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable701,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:56,827 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:56,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:56,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1927076115, now seen corresponding path program 167 times [2021-06-05 22:35:56,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:56,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435689076] [2021-06-05 22:35:56,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:56,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:56,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:56,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435689076] [2021-06-05 22:35:56,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435689076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:56,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415361471] [2021-06-05 22:35:56,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:56,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:35:56,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:56,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:56,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:57,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:57,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:57,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:57,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:57,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:57,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:35:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:57,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415361471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:57,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:57,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:57,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899171446] [2021-06-05 22:35:57,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:57,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:57,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:57,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:57,143 INFO L87 Difference]: Start difference. First operand 3798 states and 15910 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:57,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:57,635 INFO L93 Difference]: Finished difference Result 4052 states and 16882 transitions. [2021-06-05 22:35:57,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:35:57,635 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:57,643 INFO L225 Difference]: With dead ends: 4052 [2021-06-05 22:35:57,643 INFO L226 Difference]: Without dead ends: 4031 [2021-06-05 22:35:57,643 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 435.2ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:35:57,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4031 states. [2021-06-05 22:35:57,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4031 to 3794. [2021-06-05 22:35:57,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.190350645926707) internal successors, (15894), 3793 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15894 transitions. [2021-06-05 22:35:57,693 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15894 transitions. Word has length 23 [2021-06-05 22:35:57,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:57,693 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15894 transitions. [2021-06-05 22:35:57,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:57,694 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15894 transitions. [2021-06-05 22:35:57,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:57,699 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:57,699 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:57,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable703 [2021-06-05 22:35:57,899 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:57,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:57,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1433114925, now seen corresponding path program 168 times [2021-06-05 22:35:57,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:57,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306234104] [2021-06-05 22:35:57,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:58,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:58,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306234104] [2021-06-05 22:35:58,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306234104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:58,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063491108] [2021-06-05 22:35:58,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:58,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:35:58,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:58,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:58,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:58,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:58,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:58,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:58,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:58,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:58,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:35:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:58,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063491108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:58,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:58,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:58,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459257763] [2021-06-05 22:35:58,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:58,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:58,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:58,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:58,223 INFO L87 Difference]: Start difference. First operand 3794 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:58,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:58,761 INFO L93 Difference]: Finished difference Result 4030 states and 16793 transitions. [2021-06-05 22:35:58,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:35:58,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:58,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:58,769 INFO L225 Difference]: With dead ends: 4030 [2021-06-05 22:35:58,769 INFO L226 Difference]: Without dead ends: 4005 [2021-06-05 22:35:58,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 532.2ms TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:35:58,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4005 states. [2021-06-05 22:35:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4005 to 3798. [2021-06-05 22:35:58,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 4.190150118514617) internal successors, (15910), 3797 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:58,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 15910 transitions. [2021-06-05 22:35:58,818 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 15910 transitions. Word has length 23 [2021-06-05 22:35:58,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:58,818 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 15910 transitions. [2021-06-05 22:35:58,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:58,818 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 15910 transitions. [2021-06-05 22:35:58,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:58,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:58,823 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:59,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable705,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:59,024 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:59,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:59,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1849159839, now seen corresponding path program 169 times [2021-06-05 22:35:59,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:59,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422646392] [2021-06-05 22:35:59,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:59,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:59,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422646392] [2021-06-05 22:35:59,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422646392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:59,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697290046] [2021-06-05 22:35:59,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:59,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:35:59,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:59,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:59,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:35:59,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:59,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:59,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:59,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:35:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:59,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697290046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:59,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:59,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:35:59,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203018352] [2021-06-05 22:35:59,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:35:59,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:59,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:35:59,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:35:59,341 INFO L87 Difference]: Start difference. First operand 3798 states and 15910 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:59,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:59,856 INFO L93 Difference]: Finished difference Result 4039 states and 16830 transitions. [2021-06-05 22:35:59,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:35:59,857 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:35:59,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:59,864 INFO L225 Difference]: With dead ends: 4039 [2021-06-05 22:35:59,864 INFO L226 Difference]: Without dead ends: 4018 [2021-06-05 22:35:59,864 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 520.4ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:35:59,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4018 states. [2021-06-05 22:35:59,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4018 to 3792. [2021-06-05 22:35:59,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.190451068319705) internal successors, (15886), 3791 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:59,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15886 transitions. [2021-06-05 22:35:59,912 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15886 transitions. Word has length 23 [2021-06-05 22:35:59,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:59,912 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15886 transitions. [2021-06-05 22:35:59,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:59,912 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15886 transitions. [2021-06-05 22:35:59,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:35:59,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:59,918 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:00,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:00,118 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:00,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:00,118 INFO L82 PathProgramCache]: Analyzing trace with hash 131673669, now seen corresponding path program 170 times [2021-06-05 22:36:00,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:00,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330264216] [2021-06-05 22:36:00,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:00,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:00,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330264216] [2021-06-05 22:36:00,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330264216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:00,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406080027] [2021-06-05 22:36:00,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:00,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:00,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:00,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:00,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:00,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:00,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:36:00,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:00,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:00,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:00,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:36:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:00,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406080027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:00,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:00,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:00,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524581308] [2021-06-05 22:36:00,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:00,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:00,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:00,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:00,416 INFO L87 Difference]: Start difference. First operand 3792 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:01,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:01,019 INFO L93 Difference]: Finished difference Result 4359 states and 18104 transitions. [2021-06-05 22:36:01,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:36:01,020 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:01,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:01,028 INFO L225 Difference]: With dead ends: 4359 [2021-06-05 22:36:01,028 INFO L226 Difference]: Without dead ends: 4328 [2021-06-05 22:36:01,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 484.4ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:36:01,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2021-06-05 22:36:01,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 3796. [2021-06-05 22:36:01,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.190777338603426) internal successors, (15904), 3795 states have internal predecessors, (15904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15904 transitions. [2021-06-05 22:36:01,079 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15904 transitions. Word has length 23 [2021-06-05 22:36:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:01,079 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15904 transitions. [2021-06-05 22:36:01,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:01,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15904 transitions. [2021-06-05 22:36:01,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:01,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:01,084 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:01,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:01,285 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:01,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:01,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1171909467, now seen corresponding path program 171 times [2021-06-05 22:36:01,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:01,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102503804] [2021-06-05 22:36:01,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:01,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:01,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102503804] [2021-06-05 22:36:01,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102503804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:01,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115836557] [2021-06-05 22:36:01,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:01,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:36:01,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:01,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:01,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:01,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:01,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:01,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:01,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:01,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:01,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:36:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:01,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115836557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:01,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:01,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:01,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829566165] [2021-06-05 22:36:01,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:01,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:01,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:01,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:01,591 INFO L87 Difference]: Start difference. First operand 3796 states and 15904 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:02,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:02,344 INFO L93 Difference]: Finished difference Result 4229 states and 17589 transitions. [2021-06-05 22:36:02,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:36:02,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:02,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:02,352 INFO L225 Difference]: With dead ends: 4229 [2021-06-05 22:36:02,352 INFO L226 Difference]: Without dead ends: 4204 [2021-06-05 22:36:02,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 655.1ms TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:36:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4204 states. [2021-06-05 22:36:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4204 to 3800. [2021-06-05 22:36:02,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.190576467491445) internal successors, (15920), 3799 states have internal predecessors, (15920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15920 transitions. [2021-06-05 22:36:02,404 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15920 transitions. Word has length 23 [2021-06-05 22:36:02,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:02,404 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15920 transitions. [2021-06-05 22:36:02,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:02,404 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15920 transitions. [2021-06-05 22:36:02,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:02,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:02,410 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:02,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable711 [2021-06-05 22:36:02,610 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:02,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:02,610 INFO L82 PathProgramCache]: Analyzing trace with hash 159216935, now seen corresponding path program 172 times [2021-06-05 22:36:02,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:02,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286726947] [2021-06-05 22:36:02,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:02,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:02,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286726947] [2021-06-05 22:36:02,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286726947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:02,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94296467] [2021-06-05 22:36:02,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:02,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:02,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:02,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:02,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:02,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:02,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:02,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:02,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:02,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:02,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:36:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:02,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94296467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:02,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:02,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:02,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714393751] [2021-06-05 22:36:02,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:02,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:02,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:02,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:02,919 INFO L87 Difference]: Start difference. First operand 3800 states and 15920 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:03,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:03,653 INFO L93 Difference]: Finished difference Result 4273 states and 17756 transitions. [2021-06-05 22:36:03,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:36:03,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:03,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:03,661 INFO L225 Difference]: With dead ends: 4273 [2021-06-05 22:36:03,661 INFO L226 Difference]: Without dead ends: 4252 [2021-06-05 22:36:03,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 645.4ms TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:36:03,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4252 states. [2021-06-05 22:36:03,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4252 to 3792. [2021-06-05 22:36:03,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.190451068319705) internal successors, (15886), 3791 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:03,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15886 transitions. [2021-06-05 22:36:03,714 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15886 transitions. Word has length 23 [2021-06-05 22:36:03,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:03,714 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15886 transitions. [2021-06-05 22:36:03,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:03,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15886 transitions. [2021-06-05 22:36:03,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:03,719 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:03,719 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:03,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:03,920 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:03,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:03,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1986304985, now seen corresponding path program 173 times [2021-06-05 22:36:03,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:03,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430058775] [2021-06-05 22:36:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:04,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:04,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430058775] [2021-06-05 22:36:04,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430058775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:04,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439585064] [2021-06-05 22:36:04,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:04,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:36:04,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:04,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:04,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:04,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:04,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:36:04,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:04,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:04,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:04,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:36:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:04,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439585064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:04,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:04,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:04,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752540137] [2021-06-05 22:36:04,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:04,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:04,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:04,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:04,212 INFO L87 Difference]: Start difference. First operand 3792 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:04,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:04,757 INFO L93 Difference]: Finished difference Result 4075 states and 16982 transitions. [2021-06-05 22:36:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:36:04,758 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:04,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:04,765 INFO L225 Difference]: With dead ends: 4075 [2021-06-05 22:36:04,765 INFO L226 Difference]: Without dead ends: 4053 [2021-06-05 22:36:04,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 439.8ms TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:36:04,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2021-06-05 22:36:04,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 3796. [2021-06-05 22:36:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.190777338603426) internal successors, (15904), 3795 states have internal predecessors, (15904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:04,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15904 transitions. [2021-06-05 22:36:04,817 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15904 transitions. Word has length 23 [2021-06-05 22:36:04,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:04,817 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15904 transitions. [2021-06-05 22:36:04,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:04,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15904 transitions. [2021-06-05 22:36:04,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:04,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:04,822 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:05,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:05,023 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:05,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:05,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1400971033, now seen corresponding path program 174 times [2021-06-05 22:36:05,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:05,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709960960] [2021-06-05 22:36:05,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:05,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:05,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709960960] [2021-06-05 22:36:05,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709960960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:05,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466873443] [2021-06-05 22:36:05,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:05,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:36:05,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:05,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:05,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:05,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:05,256 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:36:05,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:36:05,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:05,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:05,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:05,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 22:36:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:05,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466873443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:05,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:05,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:36:05,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052733901] [2021-06-05 22:36:05,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:36:05,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:05,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:36:05,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:36:05,357 INFO L87 Difference]: Start difference. First operand 3796 states and 15904 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:05,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:05,964 INFO L93 Difference]: Finished difference Result 4077 states and 16978 transitions. [2021-06-05 22:36:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:36:05,964 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:05,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:05,972 INFO L225 Difference]: With dead ends: 4077 [2021-06-05 22:36:05,972 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 22:36:05,972 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 508.4ms TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:36:05,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 22:36:06,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3800. [2021-06-05 22:36:06,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.190576467491445) internal successors, (15920), 3799 states have internal predecessors, (15920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:06,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15920 transitions. [2021-06-05 22:36:06,024 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15920 transitions. Word has length 23 [2021-06-05 22:36:06,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:06,025 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15920 transitions. [2021-06-05 22:36:06,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:06,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15920 transitions. [2021-06-05 22:36:06,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:06,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:06,030 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:06,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:06,230 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:06,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:06,231 INFO L82 PathProgramCache]: Analyzing trace with hash 212595701, now seen corresponding path program 175 times [2021-06-05 22:36:06,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:06,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143039091] [2021-06-05 22:36:06,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:06,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:06,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143039091] [2021-06-05 22:36:06,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143039091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:06,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012363821] [2021-06-05 22:36:06,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:06,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:06,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:06,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:06,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:06,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:06,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:06,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:06,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:36:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:06,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012363821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:06,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:06,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:06,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282840299] [2021-06-05 22:36:06,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:06,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:06,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:06,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:06,531 INFO L87 Difference]: Start difference. First operand 3800 states and 15920 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:07,040 INFO L93 Difference]: Finished difference Result 4013 states and 16724 transitions. [2021-06-05 22:36:07,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:36:07,040 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:07,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:07,047 INFO L225 Difference]: With dead ends: 4013 [2021-06-05 22:36:07,047 INFO L226 Difference]: Without dead ends: 3992 [2021-06-05 22:36:07,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 467.5ms TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:36:07,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3992 states. [2021-06-05 22:36:07,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3992 to 3792. [2021-06-05 22:36:07,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.190451068319705) internal successors, (15886), 3791 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15886 transitions. [2021-06-05 22:36:07,098 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15886 transitions. Word has length 23 [2021-06-05 22:36:07,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:07,099 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15886 transitions. [2021-06-05 22:36:07,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:07,099 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15886 transitions. [2021-06-05 22:36:07,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:07,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:07,104 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:07,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable721,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:07,304 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:07,305 INFO L82 PathProgramCache]: Analyzing trace with hash -343292505, now seen corresponding path program 176 times [2021-06-05 22:36:07,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:07,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62741789] [2021-06-05 22:36:07,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:07,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:07,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62741789] [2021-06-05 22:36:07,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62741789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:07,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600511866] [2021-06-05 22:36:07,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:07,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:07,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:07,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:07,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:07,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:07,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:07,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:07,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:07,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:07,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:36:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:07,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600511866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:07,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:07,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:07,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460579066] [2021-06-05 22:36:07,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:07,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:07,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:07,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:07,633 INFO L87 Difference]: Start difference. First operand 3792 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:08,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:08,233 INFO L93 Difference]: Finished difference Result 4089 states and 17033 transitions. [2021-06-05 22:36:08,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:36:08,233 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:08,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:08,241 INFO L225 Difference]: With dead ends: 4089 [2021-06-05 22:36:08,241 INFO L226 Difference]: Without dead ends: 4063 [2021-06-05 22:36:08,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 546.1ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:36:08,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4063 states. [2021-06-05 22:36:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4063 to 3801. [2021-06-05 22:36:08,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3800 states have (on average 4.1889473684210525) internal successors, (15918), 3800 states have internal predecessors, (15918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:08,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 15918 transitions. [2021-06-05 22:36:08,292 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 15918 transitions. Word has length 23 [2021-06-05 22:36:08,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:08,292 INFO L482 AbstractCegarLoop]: Abstraction has 3801 states and 15918 transitions. [2021-06-05 22:36:08,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:08,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 15918 transitions. [2021-06-05 22:36:08,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:08,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:08,298 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:08,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-06-05 22:36:08,498 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:08,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:08,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1384868573, now seen corresponding path program 177 times [2021-06-05 22:36:08,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:08,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998817213] [2021-06-05 22:36:08,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:08,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:08,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998817213] [2021-06-05 22:36:08,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998817213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:08,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159262273] [2021-06-05 22:36:08,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:08,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:36:08,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:08,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:08,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:08,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:08,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:08,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:08,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:08,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:08,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:36:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:08,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159262273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:08,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:08,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:08,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680121451] [2021-06-05 22:36:08,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:08,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:08,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:08,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:08,822 INFO L87 Difference]: Start difference. First operand 3801 states and 15918 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:09,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:09,388 INFO L93 Difference]: Finished difference Result 4036 states and 16822 transitions. [2021-06-05 22:36:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:36:09,388 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:09,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:09,395 INFO L225 Difference]: With dead ends: 4036 [2021-06-05 22:36:09,395 INFO L226 Difference]: Without dead ends: 4008 [2021-06-05 22:36:09,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 508.2ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:36:09,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2021-06-05 22:36:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 3794. [2021-06-05 22:36:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.190350645926707) internal successors, (15894), 3793 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:09,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15894 transitions. [2021-06-05 22:36:09,445 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15894 transitions. Word has length 23 [2021-06-05 22:36:09,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:09,445 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15894 transitions. [2021-06-05 22:36:09,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:09,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15894 transitions. [2021-06-05 22:36:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:09,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:09,450 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:09,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable725,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:09,651 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:09,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1671989925, now seen corresponding path program 178 times [2021-06-05 22:36:09,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:09,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734475275] [2021-06-05 22:36:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:09,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:09,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734475275] [2021-06-05 22:36:09,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734475275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:09,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491607154] [2021-06-05 22:36:09,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:09,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:09,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:09,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:09,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:09,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:09,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:09,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:09,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:09,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:09,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:36:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:09,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491607154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:09,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:09,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:09,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133557631] [2021-06-05 22:36:09,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:09,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:09,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:09,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:09,964 INFO L87 Difference]: Start difference. First operand 3794 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:10,549 INFO L93 Difference]: Finished difference Result 4000 states and 16671 transitions. [2021-06-05 22:36:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:36:10,550 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:10,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:10,556 INFO L225 Difference]: With dead ends: 4000 [2021-06-05 22:36:10,556 INFO L226 Difference]: Without dead ends: 3974 [2021-06-05 22:36:10,557 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 519.4ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:36:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3974 states. [2021-06-05 22:36:10,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3974 to 3798. [2021-06-05 22:36:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 4.190150118514617) internal successors, (15910), 3797 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 15910 transitions. [2021-06-05 22:36:10,605 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 15910 transitions. Word has length 23 [2021-06-05 22:36:10,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:10,605 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 15910 transitions. [2021-06-05 22:36:10,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:10,605 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 15910 transitions. [2021-06-05 22:36:10,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:10,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:10,610 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:10,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable727 [2021-06-05 22:36:10,810 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:10,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:10,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2129759985, now seen corresponding path program 179 times [2021-06-05 22:36:10,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:10,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075766870] [2021-06-05 22:36:10,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:10,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:10,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075766870] [2021-06-05 22:36:10,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075766870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:10,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497164178] [2021-06-05 22:36:10,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:10,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:36:10,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:10,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:10,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:11,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:11,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:11,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:11,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:11,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:11,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:36:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:11,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497164178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:11,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:11,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:11,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540504186] [2021-06-05 22:36:11,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:11,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:11,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:11,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:11,135 INFO L87 Difference]: Start difference. First operand 3798 states and 15910 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:11,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:11,615 INFO L93 Difference]: Finished difference Result 3986 states and 16616 transitions. [2021-06-05 22:36:11,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:36:11,616 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:11,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:11,623 INFO L225 Difference]: With dead ends: 3986 [2021-06-05 22:36:11,623 INFO L226 Difference]: Without dead ends: 3965 [2021-06-05 22:36:11,623 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 431.6ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:36:11,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3965 states. [2021-06-05 22:36:11,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3965 to 3794. [2021-06-05 22:36:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.190350645926707) internal successors, (15894), 3793 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:11,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15894 transitions. [2021-06-05 22:36:11,671 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15894 transitions. Word has length 23 [2021-06-05 22:36:11,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:11,672 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15894 transitions. [2021-06-05 22:36:11,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:11,672 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15894 transitions. [2021-06-05 22:36:11,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:11,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:11,677 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:11,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:11,877 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:11,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:11,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1230431055, now seen corresponding path program 180 times [2021-06-05 22:36:11,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:11,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247413280] [2021-06-05 22:36:11,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:11,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:11,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247413280] [2021-06-05 22:36:11,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247413280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:11,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251868336] [2021-06-05 22:36:11,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:12,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:36:12,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:12,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:36:12,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:12,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:12,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:12,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-06-05 22:36:12,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:12,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:12,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:12,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:32 [2021-06-05 22:36:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:12,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251868336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:12,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:12,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:12,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390559634] [2021-06-05 22:36:12,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:12,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:12,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:12,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:12,186 INFO L87 Difference]: Start difference. First operand 3794 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:12,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:12,598 INFO L93 Difference]: Finished difference Result 3923 states and 16367 transitions. [2021-06-05 22:36:12,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:36:12,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:12,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:12,605 INFO L225 Difference]: With dead ends: 3923 [2021-06-05 22:36:12,605 INFO L226 Difference]: Without dead ends: 3898 [2021-06-05 22:36:12,605 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 339.7ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:12,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3898 states. [2021-06-05 22:36:12,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3898 to 3798. [2021-06-05 22:36:12,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 4.190150118514617) internal successors, (15910), 3797 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:12,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 15910 transitions. [2021-06-05 22:36:12,652 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 15910 transitions. Word has length 23 [2021-06-05 22:36:12,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:12,652 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 15910 transitions. [2021-06-05 22:36:12,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:12,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 15910 transitions. [2021-06-05 22:36:12,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:12,658 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:12,658 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:12,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable731 [2021-06-05 22:36:12,858 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:12,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:12,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2051843709, now seen corresponding path program 181 times [2021-06-05 22:36:12,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:12,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671819275] [2021-06-05 22:36:12,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:12,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:12,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671819275] [2021-06-05 22:36:12,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671819275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:12,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015086922] [2021-06-05 22:36:12,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:12,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:12,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:13,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:13,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:13,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:13,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:13,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:13,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:36:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:13,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015086922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:13,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:13,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:13,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483724474] [2021-06-05 22:36:13,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:13,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:13,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:13,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:13,177 INFO L87 Difference]: Start difference. First operand 3798 states and 15910 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:13,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:13,708 INFO L93 Difference]: Finished difference Result 3973 states and 16564 transitions. [2021-06-05 22:36:13,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:36:13,709 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:13,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:13,716 INFO L225 Difference]: With dead ends: 3973 [2021-06-05 22:36:13,716 INFO L226 Difference]: Without dead ends: 3952 [2021-06-05 22:36:13,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 525.3ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:36:13,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-06-05 22:36:13,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3790. [2021-06-05 22:36:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3789 states have (on average 4.1902876748482445) internal successors, (15877), 3789 states have internal predecessors, (15877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:13,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 15877 transitions. [2021-06-05 22:36:13,765 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 15877 transitions. Word has length 23 [2021-06-05 22:36:13,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:13,765 INFO L482 AbstractCegarLoop]: Abstraction has 3790 states and 15877 transitions. [2021-06-05 22:36:13,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:13,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 15877 transitions. [2021-06-05 22:36:13,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:13,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:13,770 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:13,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable732,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:13,971 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:13,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:13,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1035728603, now seen corresponding path program 182 times [2021-06-05 22:36:13,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:13,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68999520] [2021-06-05 22:36:13,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:14,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:14,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:14,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68999520] [2021-06-05 22:36:14,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68999520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:14,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767960852] [2021-06-05 22:36:14,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:14,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:14,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:14,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:14,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:14,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:14,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:36:14,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:14,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:14,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:14,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:36:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:14,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767960852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:14,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:14,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:14,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046057378] [2021-06-05 22:36:14,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:14,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:14,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:14,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:14,253 INFO L87 Difference]: Start difference. First operand 3790 states and 15877 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:14,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:14,889 INFO L93 Difference]: Finished difference Result 4093 states and 17042 transitions. [2021-06-05 22:36:14,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:36:14,889 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:14,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:14,896 INFO L225 Difference]: With dead ends: 4093 [2021-06-05 22:36:14,897 INFO L226 Difference]: Without dead ends: 4071 [2021-06-05 22:36:14,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 458.2ms TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:36:14,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2021-06-05 22:36:14,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 3798. [2021-06-05 22:36:14,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 4.190413484329734) internal successors, (15911), 3797 states have internal predecessors, (15911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 15911 transitions. [2021-06-05 22:36:14,946 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 15911 transitions. Word has length 23 [2021-06-05 22:36:14,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:14,946 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 15911 transitions. [2021-06-05 22:36:14,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:14,946 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 15911 transitions. [2021-06-05 22:36:14,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:14,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:14,951 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:15,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-06-05 22:36:15,152 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:15,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:15,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1621062555, now seen corresponding path program 183 times [2021-06-05 22:36:15,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:15,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510931127] [2021-06-05 22:36:15,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:15,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:15,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510931127] [2021-06-05 22:36:15,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510931127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:15,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783495109] [2021-06-05 22:36:15,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:15,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:36:15,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:15,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:36:15,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:15,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:15,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:36:15,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:15,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 22:36:15,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:15,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:15,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:15,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:36:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:15,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783495109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:15,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:15,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:15,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013826042] [2021-06-05 22:36:15,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:15,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:15,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:15,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:15,433 INFO L87 Difference]: Start difference. First operand 3798 states and 15911 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:15,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:15,929 INFO L93 Difference]: Finished difference Result 4064 states and 16898 transitions. [2021-06-05 22:36:15,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:36:15,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:15,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:15,936 INFO L225 Difference]: With dead ends: 4064 [2021-06-05 22:36:15,936 INFO L226 Difference]: Without dead ends: 4038 [2021-06-05 22:36:15,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 383.2ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:36:15,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4038 states. [2021-06-05 22:36:15,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4038 to 3802. [2021-06-05 22:36:15,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3802 states, 3801 states have (on average 4.190213101815312) internal successors, (15927), 3801 states have internal predecessors, (15927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 15927 transitions. [2021-06-05 22:36:15,988 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 15927 transitions. Word has length 23 [2021-06-05 22:36:15,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:15,988 INFO L482 AbstractCegarLoop]: Abstraction has 3802 states and 15927 transitions. [2021-06-05 22:36:15,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:15,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 15927 transitions. [2021-06-05 22:36:15,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:15,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:15,993 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:16,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-06-05 22:36:16,194 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:16,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:16,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1060338007, now seen corresponding path program 184 times [2021-06-05 22:36:16,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:16,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744502143] [2021-06-05 22:36:16,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:16,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:16,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744502143] [2021-06-05 22:36:16,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744502143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:16,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601391620] [2021-06-05 22:36:16,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:16,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:16,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:16,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:16,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:16,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:16,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:16,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:16,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:16,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:16,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:36:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:16,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601391620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:16,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:16,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:16,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029385122] [2021-06-05 22:36:16,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:16,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:16,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:16,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:16,498 INFO L87 Difference]: Start difference. First operand 3802 states and 15927 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:17,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:17,070 INFO L93 Difference]: Finished difference Result 4028 states and 16778 transitions. [2021-06-05 22:36:17,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:36:17,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:17,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:17,077 INFO L225 Difference]: With dead ends: 4028 [2021-06-05 22:36:17,077 INFO L226 Difference]: Without dead ends: 4007 [2021-06-05 22:36:17,078 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 509.0ms TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:36:17,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-06-05 22:36:17,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3794. [2021-06-05 22:36:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.190087002372792) internal successors, (15893), 3793 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15893 transitions. [2021-06-05 22:36:17,145 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15893 transitions. Word has length 23 [2021-06-05 22:36:17,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:17,145 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15893 transitions. [2021-06-05 22:36:17,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:17,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15893 transitions. [2021-06-05 22:36:17,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:17,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:17,150 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:17,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:17,350 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:17,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:17,351 INFO L82 PathProgramCache]: Analyzing trace with hash -499776783, now seen corresponding path program 185 times [2021-06-05 22:36:17,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:17,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180754394] [2021-06-05 22:36:17,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:17,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:17,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180754394] [2021-06-05 22:36:17,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180754394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:17,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334860785] [2021-06-05 22:36:17,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:17,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:36:17,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:17,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:17,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:17,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:17,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:36:17,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:17,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:17,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:17,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:36:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:17,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334860785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:17,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:17,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:17,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735371493] [2021-06-05 22:36:17,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:17,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:17,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:17,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:17,647 INFO L87 Difference]: Start difference. First operand 3794 states and 15893 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:18,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:18,187 INFO L93 Difference]: Finished difference Result 4036 states and 16825 transitions. [2021-06-05 22:36:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:36:18,187 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:18,195 INFO L225 Difference]: With dead ends: 4036 [2021-06-05 22:36:18,195 INFO L226 Difference]: Without dead ends: 4013 [2021-06-05 22:36:18,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 399.0ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:36:18,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4013 states. [2021-06-05 22:36:18,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4013 to 3790. [2021-06-05 22:36:18,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3789 states have (on average 4.1902876748482445) internal successors, (15877), 3789 states have internal predecessors, (15877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 15877 transitions. [2021-06-05 22:36:18,245 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 15877 transitions. Word has length 23 [2021-06-05 22:36:18,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:18,245 INFO L482 AbstractCegarLoop]: Abstraction has 3790 states and 15877 transitions. [2021-06-05 22:36:18,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:18,245 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 15877 transitions. [2021-06-05 22:36:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:18,251 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:18,251 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:18,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:18,451 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:18,452 INFO L82 PathProgramCache]: Analyzing trace with hash 172040369, now seen corresponding path program 186 times [2021-06-05 22:36:18,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:18,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129949378] [2021-06-05 22:36:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:18,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:18,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129949378] [2021-06-05 22:36:18,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129949378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:18,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272763450] [2021-06-05 22:36:18,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:18,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:36:18,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:18,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:18,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:18,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:18,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:36:18,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:18,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:18,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:18,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:36:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:18,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272763450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:18,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:18,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:18,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712890343] [2021-06-05 22:36:18,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:18,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:18,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:18,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:18,738 INFO L87 Difference]: Start difference. First operand 3790 states and 15877 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:19,335 INFO L93 Difference]: Finished difference Result 4207 states and 17506 transitions. [2021-06-05 22:36:19,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:36:19,335 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:19,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:19,343 INFO L225 Difference]: With dead ends: 4207 [2021-06-05 22:36:19,343 INFO L226 Difference]: Without dead ends: 4185 [2021-06-05 22:36:19,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 418.7ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:36:19,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2021-06-05 22:36:19,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3798. [2021-06-05 22:36:19,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 4.190413484329734) internal successors, (15911), 3797 states have internal predecessors, (15911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:19,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 15911 transitions. [2021-06-05 22:36:19,415 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 15911 transitions. Word has length 23 [2021-06-05 22:36:19,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:19,415 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 15911 transitions. [2021-06-05 22:36:19,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:19,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 15911 transitions. [2021-06-05 22:36:19,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:19,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:19,421 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:19,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-06-05 22:36:19,621 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:19,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:19,621 INFO L82 PathProgramCache]: Analyzing trace with hash 685567221, now seen corresponding path program 187 times [2021-06-05 22:36:19,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:19,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406992584] [2021-06-05 22:36:19,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:19,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:19,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406992584] [2021-06-05 22:36:19,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406992584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:19,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443565481] [2021-06-05 22:36:19,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:19,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:19,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:19,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:19,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:19,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:19,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:19,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:19,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:36:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:19,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443565481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:19,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:19,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:19,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490725239] [2021-06-05 22:36:19,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:19,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:19,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:19,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:19,918 INFO L87 Difference]: Start difference. First operand 3798 states and 15911 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:20,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:20,654 INFO L93 Difference]: Finished difference Result 4110 states and 17112 transitions. [2021-06-05 22:36:20,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:36:20,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:20,662 INFO L225 Difference]: With dead ends: 4110 [2021-06-05 22:36:20,662 INFO L226 Difference]: Without dead ends: 4085 [2021-06-05 22:36:20,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 662.3ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:36:20,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-06-05 22:36:20,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 3802. [2021-06-05 22:36:20,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3802 states, 3801 states have (on average 4.190213101815312) internal successors, (15927), 3801 states have internal predecessors, (15927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:20,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 15927 transitions. [2021-06-05 22:36:20,713 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 15927 transitions. Word has length 23 [2021-06-05 22:36:20,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:20,713 INFO L482 AbstractCegarLoop]: Abstraction has 3802 states and 15927 transitions. [2021-06-05 22:36:20,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:20,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 15927 transitions. [2021-06-05 22:36:20,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:20,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:20,718 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:20,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable743,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:20,919 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:20,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1761278377, now seen corresponding path program 188 times [2021-06-05 22:36:20,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:20,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395797162] [2021-06-05 22:36:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:21,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:21,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395797162] [2021-06-05 22:36:21,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395797162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:21,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667538666] [2021-06-05 22:36:21,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:21,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:21,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:21,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:21,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:21,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:21,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:21,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:21,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:21,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:21,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:36:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:21,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667538666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:21,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:21,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:21,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447789541] [2021-06-05 22:36:21,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:21,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:21,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:21,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:21,213 INFO L87 Difference]: Start difference. First operand 3802 states and 15927 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:21,872 INFO L93 Difference]: Finished difference Result 4079 states and 16992 transitions. [2021-06-05 22:36:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:36:21,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:21,879 INFO L225 Difference]: With dead ends: 4079 [2021-06-05 22:36:21,879 INFO L226 Difference]: Without dead ends: 4058 [2021-06-05 22:36:21,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 613.6ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:36:21,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-06-05 22:36:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 3794. [2021-06-05 22:36:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.190087002372792) internal successors, (15893), 3793 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15893 transitions. [2021-06-05 22:36:21,928 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15893 transitions. Word has length 23 [2021-06-05 22:36:21,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:21,929 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15893 transitions. [2021-06-05 22:36:21,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:21,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15893 transitions. [2021-06-05 22:36:21,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:21,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:21,934 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:22,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable745 [2021-06-05 22:36:22,134 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:22,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:22,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1932093309, now seen corresponding path program 189 times [2021-06-05 22:36:22,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:22,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339550500] [2021-06-05 22:36:22,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:22,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:22,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339550500] [2021-06-05 22:36:22,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339550500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:22,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949842351] [2021-06-05 22:36:22,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:22,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:36:22,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:22,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:36:22,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:22,398 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 22:36:22,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 65 [2021-06-05 22:36:22,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:22,417 INFO L628 ElimStorePlain]: treesize reduction 39, result has 26.4 percent of original size [2021-06-05 22:36:22,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:22,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:14 [2021-06-05 22:36:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:22,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949842351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:22,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:22,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:36:22,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843979741] [2021-06-05 22:36:22,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:36:22,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:22,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:36:22,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:36:22,460 INFO L87 Difference]: Start difference. First operand 3794 states and 15893 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:23,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:23,223 INFO L93 Difference]: Finished difference Result 4142 states and 17255 transitions. [2021-06-05 22:36:23,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:36:23,223 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:23,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:23,231 INFO L225 Difference]: With dead ends: 4142 [2021-06-05 22:36:23,231 INFO L226 Difference]: Without dead ends: 4119 [2021-06-05 22:36:23,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 501.8ms TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:36:23,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2021-06-05 22:36:23,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 3788. [2021-06-05 22:36:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.190388170055453) internal successors, (15869), 3787 states have internal predecessors, (15869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:23,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15869 transitions. [2021-06-05 22:36:23,280 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15869 transitions. Word has length 23 [2021-06-05 22:36:23,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:23,280 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15869 transitions. [2021-06-05 22:36:23,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:23,281 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15869 transitions. [2021-06-05 22:36:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:23,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:23,286 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:23,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable747,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:23,486 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:23,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:23,486 INFO L82 PathProgramCache]: Analyzing trace with hash 695325603, now seen corresponding path program 190 times [2021-06-05 22:36:23,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:23,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454306323] [2021-06-05 22:36:23,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:23,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:23,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454306323] [2021-06-05 22:36:23,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454306323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:23,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191623421] [2021-06-05 22:36:23,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:23,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:23,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:23,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:23,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:23,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:23,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:36:23,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:23,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:23,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:23,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:36:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:23,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191623421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:23,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:23,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:23,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935916125] [2021-06-05 22:36:23,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:23,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:23,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:23,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:23,777 INFO L87 Difference]: Start difference. First operand 3788 states and 15869 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:24,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:24,428 INFO L93 Difference]: Finished difference Result 4480 states and 18590 transitions. [2021-06-05 22:36:24,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:36:24,428 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:24,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:24,437 INFO L225 Difference]: With dead ends: 4480 [2021-06-05 22:36:24,438 INFO L226 Difference]: Without dead ends: 4458 [2021-06-05 22:36:24,438 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 483.2ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:36:24,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4458 states. [2021-06-05 22:36:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4458 to 3796. [2021-06-05 22:36:24,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.189723320158103) internal successors, (15900), 3795 states have internal predecessors, (15900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15900 transitions. [2021-06-05 22:36:24,493 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15900 transitions. Word has length 23 [2021-06-05 22:36:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:24,493 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15900 transitions. [2021-06-05 22:36:24,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15900 transitions. [2021-06-05 22:36:24,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:24,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:24,499 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:24,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-05 22:36:24,699 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:24,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:24,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1208852455, now seen corresponding path program 191 times [2021-06-05 22:36:24,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:24,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829333550] [2021-06-05 22:36:24,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:24,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:24,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829333550] [2021-06-05 22:36:24,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829333550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:24,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34893675] [2021-06-05 22:36:24,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:24,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:24,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:24,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:24,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:24,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:24,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:24,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:24,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:24,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:24,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:36:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:24,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34893675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:24,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:24,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:25,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819426925] [2021-06-05 22:36:25,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:25,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:25,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:25,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:25,000 INFO L87 Difference]: Start difference. First operand 3796 states and 15900 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:25,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:25,961 INFO L93 Difference]: Finished difference Result 4349 states and 18055 transitions. [2021-06-05 22:36:25,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:36:25,961 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:25,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:25,969 INFO L225 Difference]: With dead ends: 4349 [2021-06-05 22:36:25,969 INFO L226 Difference]: Without dead ends: 4324 [2021-06-05 22:36:25,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 704.0ms TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:36:25,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2021-06-05 22:36:26,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 3800. [2021-06-05 22:36:26,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.189523558831271) internal successors, (15916), 3799 states have internal predecessors, (15916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15916 transitions. [2021-06-05 22:36:26,022 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15916 transitions. Word has length 23 [2021-06-05 22:36:26,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:26,022 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15916 transitions. [2021-06-05 22:36:26,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:26,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15916 transitions. [2021-06-05 22:36:26,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:26,027 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:26,027 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:26,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:26,228 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:26,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:26,228 INFO L82 PathProgramCache]: Analyzing trace with hash -2010403685, now seen corresponding path program 192 times [2021-06-05 22:36:26,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:26,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731371949] [2021-06-05 22:36:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:26,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:26,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731371949] [2021-06-05 22:36:26,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731371949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:26,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963210982] [2021-06-05 22:36:26,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:26,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:36:26,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:26,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:26,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:26,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:26,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:26,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:26,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:26,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:26,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:36:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:26,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963210982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:26,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:26,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:26,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82602516] [2021-06-05 22:36:26,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:26,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:26,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:26,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:26,552 INFO L87 Difference]: Start difference. First operand 3800 states and 15916 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:27,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:27,420 INFO L93 Difference]: Finished difference Result 4303 states and 17878 transitions. [2021-06-05 22:36:27,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:36:27,420 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:27,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:27,428 INFO L225 Difference]: With dead ends: 4303 [2021-06-05 22:36:27,428 INFO L226 Difference]: Without dead ends: 4282 [2021-06-05 22:36:27,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 667.8ms TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:36:27,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2021-06-05 22:36:27,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 3792. [2021-06-05 22:36:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.189395937747296) internal successors, (15882), 3791 states have internal predecessors, (15882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15882 transitions. [2021-06-05 22:36:27,484 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15882 transitions. Word has length 23 [2021-06-05 22:36:27,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:27,484 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15882 transitions. [2021-06-05 22:36:27,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:27,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15882 transitions. [2021-06-05 22:36:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:27,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:27,489 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:27,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable755 [2021-06-05 22:36:27,690 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:27,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:27,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1104833101, now seen corresponding path program 193 times [2021-06-05 22:36:27,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:27,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906568560] [2021-06-05 22:36:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:27,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:27,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906568560] [2021-06-05 22:36:27,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906568560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:27,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135385049] [2021-06-05 22:36:27,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:27,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:27,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:27,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:27,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:36:27,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:27,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:27,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:27,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:36:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:27,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135385049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:27,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:27,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:27,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233887757] [2021-06-05 22:36:27,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:27,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:27,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:27,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:27,984 INFO L87 Difference]: Start difference. First operand 3792 states and 15882 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:28,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:28,890 INFO L93 Difference]: Finished difference Result 4528 states and 18743 transitions. [2021-06-05 22:36:28,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:36:28,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:28,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:28,899 INFO L225 Difference]: With dead ends: 4528 [2021-06-05 22:36:28,899 INFO L226 Difference]: Without dead ends: 4497 [2021-06-05 22:36:28,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 571.9ms TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:36:28,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4497 states. [2021-06-05 22:36:28,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4497 to 3790. [2021-06-05 22:36:28,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3789 states have (on average 4.186064924782264) internal successors, (15861), 3789 states have internal predecessors, (15861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:28,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 15861 transitions. [2021-06-05 22:36:28,953 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 15861 transitions. Word has length 23 [2021-06-05 22:36:28,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:28,953 INFO L482 AbstractCegarLoop]: Abstraction has 3790 states and 15861 transitions. [2021-06-05 22:36:28,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:28,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 15861 transitions. [2021-06-05 22:36:28,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:28,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:28,958 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:29,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:29,159 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:29,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:29,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1692578423, now seen corresponding path program 194 times [2021-06-05 22:36:29,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:29,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541474749] [2021-06-05 22:36:29,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:29,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:29,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541474749] [2021-06-05 22:36:29,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541474749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:29,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494682195] [2021-06-05 22:36:29,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:29,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:29,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:29,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:29,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:29,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:29,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:29,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:29,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:29,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:29,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:36:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:29,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494682195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:29,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:29,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:29,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271970792] [2021-06-05 22:36:29,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:29,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:29,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:29,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:29,457 INFO L87 Difference]: Start difference. First operand 3790 states and 15861 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:30,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:30,264 INFO L93 Difference]: Finished difference Result 4303 states and 17861 transitions. [2021-06-05 22:36:30,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:36:30,265 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:30,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:30,273 INFO L225 Difference]: With dead ends: 4303 [2021-06-05 22:36:30,273 INFO L226 Difference]: Without dead ends: 4278 [2021-06-05 22:36:30,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 697.6ms TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:36:30,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-06-05 22:36:30,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3794. [2021-06-05 22:36:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.18586870551015) internal successors, (15877), 3793 states have internal predecessors, (15877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:30,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15877 transitions. [2021-06-05 22:36:30,328 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15877 transitions. Word has length 23 [2021-06-05 22:36:30,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:30,328 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15877 transitions. [2021-06-05 22:36:30,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:30,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15877 transitions. [2021-06-05 22:36:30,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:30,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:30,333 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:30,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:30,533 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:30,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:30,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1526677717, now seen corresponding path program 195 times [2021-06-05 22:36:30,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:30,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986601557] [2021-06-05 22:36:30,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:30,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:30,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986601557] [2021-06-05 22:36:30,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986601557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:30,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356286123] [2021-06-05 22:36:30,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:30,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:36:30,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:30,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:36:30,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:30,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:30,768 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:36:30,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:36:30,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:30,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:30,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:30,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 22:36:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:30,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356286123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:30,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:30,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:36:30,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15987742] [2021-06-05 22:36:30,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:36:30,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:30,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:36:30,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:36:30,849 INFO L87 Difference]: Start difference. First operand 3794 states and 15877 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:31,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:31,799 INFO L93 Difference]: Finished difference Result 4402 states and 18269 transitions. [2021-06-05 22:36:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:36:31,799 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:31,806 INFO L225 Difference]: With dead ends: 4402 [2021-06-05 22:36:31,806 INFO L226 Difference]: Without dead ends: 4381 [2021-06-05 22:36:31,807 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 678.8ms TimeCoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:36:31,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4381 states. [2021-06-05 22:36:31,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4381 to 3792. [2021-06-05 22:36:31,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.183065154312846) internal successors, (15858), 3791 states have internal predecessors, (15858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:31,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15858 transitions. [2021-06-05 22:36:31,863 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15858 transitions. Word has length 23 [2021-06-05 22:36:31,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:31,863 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15858 transitions. [2021-06-05 22:36:31,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:31,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15858 transitions. [2021-06-05 22:36:31,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:31,870 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:31,870 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:32,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-05 22:36:32,085 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:32,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:32,085 INFO L82 PathProgramCache]: Analyzing trace with hash -365452487, now seen corresponding path program 196 times [2021-06-05 22:36:32,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:32,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559988921] [2021-06-05 22:36:32,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:32,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:32,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559988921] [2021-06-05 22:36:32,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559988921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:32,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904575598] [2021-06-05 22:36:32,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:32,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:32,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:32,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:32,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:32,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:32,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:36:32,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:32,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:32,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:32,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:36:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:32,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904575598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:32,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:32,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:32,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989534105] [2021-06-05 22:36:32,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:32,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:32,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:32,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:32,376 INFO L87 Difference]: Start difference. First operand 3792 states and 15858 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:32,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:32,925 INFO L93 Difference]: Finished difference Result 4373 states and 18151 transitions. [2021-06-05 22:36:32,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:36:32,925 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:32,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:32,933 INFO L225 Difference]: With dead ends: 4373 [2021-06-05 22:36:32,933 INFO L226 Difference]: Without dead ends: 4351 [2021-06-05 22:36:32,933 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 437.3ms TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:36:32,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-06-05 22:36:32,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3800. [2021-06-05 22:36:32,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.183206106870229) internal successors, (15892), 3799 states have internal predecessors, (15892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:32,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15892 transitions. [2021-06-05 22:36:32,983 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15892 transitions. Word has length 23 [2021-06-05 22:36:32,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:32,983 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15892 transitions. [2021-06-05 22:36:32,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:32,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15892 transitions. [2021-06-05 22:36:32,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:32,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:32,988 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:33,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable765 [2021-06-05 22:36:33,189 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:33,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:33,189 INFO L82 PathProgramCache]: Analyzing trace with hash 148074365, now seen corresponding path program 197 times [2021-06-05 22:36:33,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:33,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345156487] [2021-06-05 22:36:33,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:33,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:33,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345156487] [2021-06-05 22:36:33,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345156487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:33,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128252002] [2021-06-05 22:36:33,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:33,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:33,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:33,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:33,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:33,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:33,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:33,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:33,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:33,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:33,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:36:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:33,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128252002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:33,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:33,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:33,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695626728] [2021-06-05 22:36:33,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:33,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:33,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:33,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:33,522 INFO L87 Difference]: Start difference. First operand 3800 states and 15892 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:34,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:34,310 INFO L93 Difference]: Finished difference Result 4247 states and 17633 transitions. [2021-06-05 22:36:34,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:36:34,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:34,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:34,318 INFO L225 Difference]: With dead ends: 4247 [2021-06-05 22:36:34,318 INFO L226 Difference]: Without dead ends: 4222 [2021-06-05 22:36:34,318 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 707.4ms TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:36:34,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2021-06-05 22:36:34,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 3804. [2021-06-05 22:36:34,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 4.183013410465422) internal successors, (15908), 3803 states have internal predecessors, (15908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 15908 transitions. [2021-06-05 22:36:34,368 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 15908 transitions. Word has length 23 [2021-06-05 22:36:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:34,368 INFO L482 AbstractCegarLoop]: Abstraction has 3804 states and 15908 transitions. [2021-06-05 22:36:34,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 15908 transitions. [2021-06-05 22:36:34,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:34,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:34,373 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:34,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable767,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:34,574 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:34,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:34,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1223785521, now seen corresponding path program 198 times [2021-06-05 22:36:34,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:34,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580468138] [2021-06-05 22:36:34,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:34,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:34,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580468138] [2021-06-05 22:36:34,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580468138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:34,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172511685] [2021-06-05 22:36:34,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:34,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:36:34,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:34,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:34,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:34,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:34,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:34,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:34,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:34,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:34,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:36:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:34,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172511685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:34,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:34,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:34,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728490507] [2021-06-05 22:36:34,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:34,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:34,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:34,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:34,871 INFO L87 Difference]: Start difference. First operand 3804 states and 15908 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:35,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:35,619 INFO L93 Difference]: Finished difference Result 4202 states and 17460 transitions. [2021-06-05 22:36:35,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:36:35,619 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:35,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:35,626 INFO L225 Difference]: With dead ends: 4202 [2021-06-05 22:36:35,627 INFO L226 Difference]: Without dead ends: 4181 [2021-06-05 22:36:35,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 623.0ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:36:35,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-06-05 22:36:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 3796. [2021-06-05 22:36:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.182872200263505) internal successors, (15874), 3795 states have internal predecessors, (15874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15874 transitions. [2021-06-05 22:36:35,696 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15874 transitions. Word has length 23 [2021-06-05 22:36:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:35,696 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15874 transitions. [2021-06-05 22:36:35,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:35,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15874 transitions. [2021-06-05 22:36:35,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:35,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:35,701 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:35,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable769,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:35,902 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:35,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:35,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1394600453, now seen corresponding path program 199 times [2021-06-05 22:36:35,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:35,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469961867] [2021-06-05 22:36:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:35,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:35,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469961867] [2021-06-05 22:36:35,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469961867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:35,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081189019] [2021-06-05 22:36:35,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:36,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:36,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:36,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:36,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:36:36,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:36,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:36,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:36,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:36:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:36,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081189019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:36,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:36,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:36,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231889825] [2021-06-05 22:36:36,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:36,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:36,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:36,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:36,192 INFO L87 Difference]: Start difference. First operand 3796 states and 15874 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:36,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:36,721 INFO L93 Difference]: Finished difference Result 4161 states and 17301 transitions. [2021-06-05 22:36:36,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:36:36,722 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:36,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:36,729 INFO L225 Difference]: With dead ends: 4161 [2021-06-05 22:36:36,729 INFO L226 Difference]: Without dead ends: 4138 [2021-06-05 22:36:36,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 404.3ms TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:36:36,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2021-06-05 22:36:36,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 3788. [2021-06-05 22:36:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.182730393451281) internal successors, (15840), 3787 states have internal predecessors, (15840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:36,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15840 transitions. [2021-06-05 22:36:36,779 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15840 transitions. Word has length 23 [2021-06-05 22:36:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:36,779 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15840 transitions. [2021-06-05 22:36:36,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15840 transitions. [2021-06-05 22:36:36,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:36,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:36,784 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:36,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable771,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:36,985 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:36,985 INFO L82 PathProgramCache]: Analyzing trace with hash 573027889, now seen corresponding path program 200 times [2021-06-05 22:36:36,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:36,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870086043] [2021-06-05 22:36:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:37,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:37,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870086043] [2021-06-05 22:36:37,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870086043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:37,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104150375] [2021-06-05 22:36:37,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:37,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:37,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:37,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:37,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:37,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:37,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:36:37,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:37,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:37,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:37,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:36:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:37,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104150375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:37,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:37,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:37,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310485066] [2021-06-05 22:36:37,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:37,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:37,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:37,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:37,270 INFO L87 Difference]: Start difference. First operand 3788 states and 15840 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:38,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:38,004 INFO L93 Difference]: Finished difference Result 4652 states and 19252 transitions. [2021-06-05 22:36:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:36:38,004 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:38,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:38,013 INFO L225 Difference]: With dead ends: 4652 [2021-06-05 22:36:38,013 INFO L226 Difference]: Without dead ends: 4630 [2021-06-05 22:36:38,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 545.7ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:36:38,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4630 states. [2021-06-05 22:36:38,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4630 to 3804. [2021-06-05 22:36:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 4.1851170128845645) internal successors, (15916), 3803 states have internal predecessors, (15916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 15916 transitions. [2021-06-05 22:36:38,084 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 15916 transitions. Word has length 23 [2021-06-05 22:36:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:38,084 INFO L482 AbstractCegarLoop]: Abstraction has 3804 states and 15916 transitions. [2021-06-05 22:36:38,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:38,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 15916 transitions. [2021-06-05 22:36:38,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:38,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:38,090 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:38,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-06-05 22:36:38,290 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:38,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:38,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1158361841, now seen corresponding path program 201 times [2021-06-05 22:36:38,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:38,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160333188] [2021-06-05 22:36:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:38,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:38,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160333188] [2021-06-05 22:36:38,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160333188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:38,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237678232] [2021-06-05 22:36:38,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:38,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:36:38,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:38,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:38,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:38,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:38,521 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:36:38,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:36:38,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:38,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:38,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:38,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 22:36:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:38,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237678232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:38,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:38,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:36:38,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410961095] [2021-06-05 22:36:38,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:36:38,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:38,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:36:38,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:36:38,629 INFO L87 Difference]: Start difference. First operand 3804 states and 15916 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:39,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:39,448 INFO L93 Difference]: Finished difference Result 4448 states and 18398 transitions. [2021-06-05 22:36:39,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:36:39,448 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:39,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:39,456 INFO L225 Difference]: With dead ends: 4448 [2021-06-05 22:36:39,456 INFO L226 Difference]: Without dead ends: 4422 [2021-06-05 22:36:39,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 630.1ms TimeCoverageRelationStatistics Valid=204, Invalid=1278, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:36:39,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4422 states. [2021-06-05 22:36:39,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4422 to 3808. [2021-06-05 22:36:39,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 4.184922511163646) internal successors, (15932), 3807 states have internal predecessors, (15932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:39,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 15932 transitions. [2021-06-05 22:36:39,509 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 15932 transitions. Word has length 23 [2021-06-05 22:36:39,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:39,510 INFO L482 AbstractCegarLoop]: Abstraction has 3808 states and 15932 transitions. [2021-06-05 22:36:39,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:39,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 15932 transitions. [2021-06-05 22:36:39,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:39,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:39,515 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:39,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:39,716 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:39,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:39,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1523038721, now seen corresponding path program 202 times [2021-06-05 22:36:39,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:39,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458098822] [2021-06-05 22:36:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:39,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:39,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458098822] [2021-06-05 22:36:39,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458098822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:39,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15233386] [2021-06-05 22:36:39,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:39,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:39,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:39,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:39,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:39,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:39,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:39,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:39,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:39,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:39,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:36:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:40,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15233386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:40,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:40,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:40,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109619488] [2021-06-05 22:36:40,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:40,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:40,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:40,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:40,008 INFO L87 Difference]: Start difference. First operand 3808 states and 15932 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:40,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:40,791 INFO L93 Difference]: Finished difference Result 4478 states and 18535 transitions. [2021-06-05 22:36:40,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:36:40,791 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:40,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:40,799 INFO L225 Difference]: With dead ends: 4478 [2021-06-05 22:36:40,799 INFO L226 Difference]: Without dead ends: 4457 [2021-06-05 22:36:40,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 683.5ms TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:36:40,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4457 states. [2021-06-05 22:36:40,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4457 to 3800. [2021-06-05 22:36:40,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.18478546986049) internal successors, (15898), 3799 states have internal predecessors, (15898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:40,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15898 transitions. [2021-06-05 22:36:40,850 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15898 transitions. Word has length 23 [2021-06-05 22:36:40,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:40,850 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15898 transitions. [2021-06-05 22:36:40,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:40,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15898 transitions. [2021-06-05 22:36:40,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:40,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:40,855 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:41,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable779 [2021-06-05 22:36:41,055 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:41,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:41,055 INFO L82 PathProgramCache]: Analyzing trace with hash 922525267, now seen corresponding path program 203 times [2021-06-05 22:36:41,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:41,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905543870] [2021-06-05 22:36:41,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:41,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:41,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905543870] [2021-06-05 22:36:41,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905543870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:41,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859311282] [2021-06-05 22:36:41,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:41,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:36:41,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:41,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:41,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:41,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:41,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:36:41,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:41,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:41,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:41,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:36:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:41,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859311282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:41,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:41,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:41,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495639592] [2021-06-05 22:36:41,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:41,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:41,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:41,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:41,335 INFO L87 Difference]: Start difference. First operand 3800 states and 15898 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:42,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:42,036 INFO L93 Difference]: Finished difference Result 4701 states and 19407 transitions. [2021-06-05 22:36:42,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:36:42,036 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:42,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:42,044 INFO L225 Difference]: With dead ends: 4701 [2021-06-05 22:36:42,045 INFO L226 Difference]: Without dead ends: 4666 [2021-06-05 22:36:42,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 543.1ms TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:36:42,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2021-06-05 22:36:42,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 3808. [2021-06-05 22:36:42,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 4.184922511163646) internal successors, (15932), 3807 states have internal predecessors, (15932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:42,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 15932 transitions. [2021-06-05 22:36:42,100 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 15932 transitions. Word has length 23 [2021-06-05 22:36:42,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:42,100 INFO L482 AbstractCegarLoop]: Abstraction has 3808 states and 15932 transitions. [2021-06-05 22:36:42,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:42,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 15932 transitions. [2021-06-05 22:36:42,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:42,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:42,105 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:42,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:42,305 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:42,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:42,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1003924323, now seen corresponding path program 204 times [2021-06-05 22:36:42,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:42,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783734845] [2021-06-05 22:36:42,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:42,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:42,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783734845] [2021-06-05 22:36:42,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783734845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:42,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820350592] [2021-06-05 22:36:42,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:42,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:36:42,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:42,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:36:42,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:42,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:42,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:42,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-06-05 22:36:42,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:42,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:42,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:42,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:36 [2021-06-05 22:36:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:42,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820350592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:42,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:42,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:36:42,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778487528] [2021-06-05 22:36:42,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:36:42,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:42,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:36:42,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:36:42,590 INFO L87 Difference]: Start difference. First operand 3808 states and 15932 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:43,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:43,115 INFO L93 Difference]: Finished difference Result 4239 states and 17592 transitions. [2021-06-05 22:36:43,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:36:43,115 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:43,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:43,122 INFO L225 Difference]: With dead ends: 4239 [2021-06-05 22:36:43,123 INFO L226 Difference]: Without dead ends: 4213 [2021-06-05 22:36:43,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 379.2ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:36:43,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4213 states. [2021-06-05 22:36:43,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4213 to 3812. [2021-06-05 22:36:43,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3812 states, 3811 states have (on average 4.1847284177381265) internal successors, (15948), 3811 states have internal predecessors, (15948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:43,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3812 states to 3812 states and 15948 transitions. [2021-06-05 22:36:43,172 INFO L78 Accepts]: Start accepts. Automaton has 3812 states and 15948 transitions. Word has length 23 [2021-06-05 22:36:43,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:43,172 INFO L482 AbstractCegarLoop]: Abstraction has 3812 states and 15948 transitions. [2021-06-05 22:36:43,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:43,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3812 states and 15948 transitions. [2021-06-05 22:36:43,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:43,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:43,178 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:43,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-05 22:36:43,378 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:43,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:43,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1677476239, now seen corresponding path program 205 times [2021-06-05 22:36:43,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:43,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229400218] [2021-06-05 22:36:43,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:43,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:43,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229400218] [2021-06-05 22:36:43,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229400218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:43,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299051565] [2021-06-05 22:36:43,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:43,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:43,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:43,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:43,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:43,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:43,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:43,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:43,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:36:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:43,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299051565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:43,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:43,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:43,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112712866] [2021-06-05 22:36:43,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:43,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:43,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:43,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:43,669 INFO L87 Difference]: Start difference. First operand 3812 states and 15948 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:44,381 INFO L93 Difference]: Finished difference Result 4410 states and 18271 transitions. [2021-06-05 22:36:44,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:36:44,381 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:44,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:44,389 INFO L225 Difference]: With dead ends: 4410 [2021-06-05 22:36:44,389 INFO L226 Difference]: Without dead ends: 4389 [2021-06-05 22:36:44,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 610.1ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:36:44,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4389 states. [2021-06-05 22:36:44,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4389 to 3806. [2021-06-05 22:36:44,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3806 states, 3805 states have (on average 4.185545335085414) internal successors, (15926), 3805 states have internal predecessors, (15926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3806 states to 3806 states and 15926 transitions. [2021-06-05 22:36:44,445 INFO L78 Accepts]: Start accepts. Automaton has 3806 states and 15926 transitions. Word has length 23 [2021-06-05 22:36:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:44,445 INFO L482 AbstractCegarLoop]: Abstraction has 3806 states and 15926 transitions. [2021-06-05 22:36:44,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:44,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3806 states and 15926 transitions. [2021-06-05 22:36:44,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:44,451 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:44,451 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:44,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable784,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:44,651 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:44,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:44,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1541226251, now seen corresponding path program 206 times [2021-06-05 22:36:44,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:44,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484379136] [2021-06-05 22:36:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:44,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:44,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484379136] [2021-06-05 22:36:44,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484379136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:44,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429550425] [2021-06-05 22:36:44,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:44,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:44,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:44,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:44,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:44,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:44,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:36:44,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:44,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:44,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:44,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:36:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:44,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429550425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:44,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:44,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:44,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785196797] [2021-06-05 22:36:44,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:44,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:44,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:44,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:44,944 INFO L87 Difference]: Start difference. First operand 3806 states and 15926 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:45,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:45,590 INFO L93 Difference]: Finished difference Result 4278 states and 17767 transitions. [2021-06-05 22:36:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:36:45,591 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:45,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:45,598 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 22:36:45,598 INFO L226 Difference]: Without dead ends: 4256 [2021-06-05 22:36:45,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 517.1ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:36:45,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4256 states. [2021-06-05 22:36:45,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4256 to 3812. [2021-06-05 22:36:45,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3812 states, 3811 states have (on average 4.1860404093413806) internal successors, (15953), 3811 states have internal predecessors, (15953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:45,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3812 states to 3812 states and 15953 transitions. [2021-06-05 22:36:45,648 INFO L78 Accepts]: Start accepts. Automaton has 3812 states and 15953 transitions. Word has length 23 [2021-06-05 22:36:45,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:45,648 INFO L482 AbstractCegarLoop]: Abstraction has 3812 states and 15953 transitions. [2021-06-05 22:36:45,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:45,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3812 states and 15953 transitions. [2021-06-05 22:36:45,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:45,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:45,653 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:45,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-06-05 22:36:45,854 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:45,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:45,854 INFO L82 PathProgramCache]: Analyzing trace with hash -955892299, now seen corresponding path program 207 times [2021-06-05 22:36:45,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:45,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189499506] [2021-06-05 22:36:45,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:45,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:45,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189499506] [2021-06-05 22:36:45,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189499506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:45,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663300097] [2021-06-05 22:36:45,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:45,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:36:45,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:45,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:36:45,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:46,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:46,093 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:36:46,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 61 [2021-06-05 22:36:46,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:46,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:46,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:46,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:48 [2021-06-05 22:36:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:46,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663300097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:46,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:46,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:36:46,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801347515] [2021-06-05 22:36:46,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:36:46,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:46,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:36:46,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:36:46,209 INFO L87 Difference]: Start difference. First operand 3812 states and 15953 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:46,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:46,882 INFO L93 Difference]: Finished difference Result 4195 states and 17417 transitions. [2021-06-05 22:36:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:36:46,882 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:46,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:46,890 INFO L225 Difference]: With dead ends: 4195 [2021-06-05 22:36:46,890 INFO L226 Difference]: Without dead ends: 4169 [2021-06-05 22:36:46,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 516.8ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:36:46,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2021-06-05 22:36:46,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 3816. [2021-06-05 22:36:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3816 states, 3815 states have (on average 4.185845347313237) internal successors, (15969), 3815 states have internal predecessors, (15969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:46,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3816 states to 3816 states and 15969 transitions. [2021-06-05 22:36:46,942 INFO L78 Accepts]: Start accepts. Automaton has 3816 states and 15969 transitions. Word has length 23 [2021-06-05 22:36:46,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:46,942 INFO L482 AbstractCegarLoop]: Abstraction has 3816 states and 15969 transitions. [2021-06-05 22:36:46,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:46,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3816 states and 15969 transitions. [2021-06-05 22:36:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:46,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:46,947 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:47,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable788,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:47,148 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:47,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:47,148 INFO L82 PathProgramCache]: Analyzing trace with hash 657674435, now seen corresponding path program 208 times [2021-06-05 22:36:47,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:47,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896198247] [2021-06-05 22:36:47,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:47,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:47,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896198247] [2021-06-05 22:36:47,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896198247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:47,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894044989] [2021-06-05 22:36:47,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:47,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:47,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:47,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:47,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:47,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:47,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:47,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:47,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:47,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:47,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:36:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:47,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894044989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:47,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:47,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:47,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282221134] [2021-06-05 22:36:47,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:47,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:47,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:47,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:47,482 INFO L87 Difference]: Start difference. First operand 3816 states and 15969 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:48,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:48,376 INFO L93 Difference]: Finished difference Result 4199 states and 17433 transitions. [2021-06-05 22:36:48,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:36:48,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:48,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:48,385 INFO L225 Difference]: With dead ends: 4199 [2021-06-05 22:36:48,385 INFO L226 Difference]: Without dead ends: 4178 [2021-06-05 22:36:48,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 749.3ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:36:48,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2021-06-05 22:36:48,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 3808. [2021-06-05 22:36:48,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 4.185710533228264) internal successors, (15935), 3807 states have internal predecessors, (15935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:48,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 15935 transitions. [2021-06-05 22:36:48,441 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 15935 transitions. Word has length 23 [2021-06-05 22:36:48,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:48,441 INFO L482 AbstractCegarLoop]: Abstraction has 3808 states and 15935 transitions. [2021-06-05 22:36:48,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 15935 transitions. [2021-06-05 22:36:48,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:48,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:48,447 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:48,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:48,647 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:48,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:48,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1768447631, now seen corresponding path program 209 times [2021-06-05 22:36:48,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:48,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760566059] [2021-06-05 22:36:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:48,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:48,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760566059] [2021-06-05 22:36:48,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760566059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:48,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595765437] [2021-06-05 22:36:48,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:48,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:36:48,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:48,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:48,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:48,890 INFO L354 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2021-06-05 22:36:48,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 22:36:48,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:48,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:48,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:48,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:29 [2021-06-05 22:36:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:48,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595765437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:48,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:48,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:48,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369373985] [2021-06-05 22:36:48,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:48,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:48,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:48,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:48,967 INFO L87 Difference]: Start difference. First operand 3808 states and 15935 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:49,671 INFO L93 Difference]: Finished difference Result 4327 states and 17960 transitions. [2021-06-05 22:36:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:36:49,672 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:49,680 INFO L225 Difference]: With dead ends: 4327 [2021-06-05 22:36:49,680 INFO L226 Difference]: Without dead ends: 4305 [2021-06-05 22:36:49,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 536.6ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:36:49,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2021-06-05 22:36:49,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 3812. [2021-06-05 22:36:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3812 states, 3811 states have (on average 4.1860404093413806) internal successors, (15953), 3811 states have internal predecessors, (15953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3812 states to 3812 states and 15953 transitions. [2021-06-05 22:36:49,751 INFO L78 Accepts]: Start accepts. Automaton has 3812 states and 15953 transitions. Word has length 23 [2021-06-05 22:36:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:49,751 INFO L482 AbstractCegarLoop]: Abstraction has 3812 states and 15953 transitions. [2021-06-05 22:36:49,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 3812 states and 15953 transitions. [2021-06-05 22:36:49,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:49,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:49,756 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:49,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-06-05 22:36:49,956 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:49,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:49,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1254920779, now seen corresponding path program 210 times [2021-06-05 22:36:49,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:49,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988702408] [2021-06-05 22:36:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:50,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:50,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988702408] [2021-06-05 22:36:50,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988702408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:50,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597653761] [2021-06-05 22:36:50,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:50,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:36:50,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:50,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:50,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:50,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:50,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:50,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:50,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:50,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:50,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:36:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:50,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597653761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:50,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:50,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:50,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456285926] [2021-06-05 22:36:50,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:50,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:50,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:50,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:50,257 INFO L87 Difference]: Start difference. First operand 3812 states and 15953 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:50,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:50,931 INFO L93 Difference]: Finished difference Result 4262 states and 17680 transitions. [2021-06-05 22:36:50,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:36:50,931 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:50,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:50,940 INFO L225 Difference]: With dead ends: 4262 [2021-06-05 22:36:50,940 INFO L226 Difference]: Without dead ends: 4237 [2021-06-05 22:36:50,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 513.9ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:36:50,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4237 states. [2021-06-05 22:36:50,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4237 to 3816. [2021-06-05 22:36:50,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3816 states, 3815 states have (on average 4.185845347313237) internal successors, (15969), 3815 states have internal predecessors, (15969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:50,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3816 states to 3816 states and 15969 transitions. [2021-06-05 22:36:50,992 INFO L78 Accepts]: Start accepts. Automaton has 3816 states and 15969 transitions. Word has length 23 [2021-06-05 22:36:50,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:50,992 INFO L482 AbstractCegarLoop]: Abstraction has 3816 states and 15969 transitions. [2021-06-05 22:36:50,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:50,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3816 states and 15969 transitions. [2021-06-05 22:36:50,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:50,997 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:50,997 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:51,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-06-05 22:36:51,198 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:51,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:51,198 INFO L82 PathProgramCache]: Analyzing trace with hash -179209623, now seen corresponding path program 211 times [2021-06-05 22:36:51,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:51,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898628596] [2021-06-05 22:36:51,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:51,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:51,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898628596] [2021-06-05 22:36:51,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898628596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:51,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304333591] [2021-06-05 22:36:51,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:51,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:51,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:51,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:51,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:51,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:51,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:51,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:51,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:36:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:51,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304333591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:51,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:51,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:51,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63356547] [2021-06-05 22:36:51,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:51,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:51,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:51,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:51,497 INFO L87 Difference]: Start difference. First operand 3816 states and 15969 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:52,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:52,357 INFO L93 Difference]: Finished difference Result 4257 states and 17668 transitions. [2021-06-05 22:36:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:36:52,357 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:52,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:52,365 INFO L225 Difference]: With dead ends: 4257 [2021-06-05 22:36:52,365 INFO L226 Difference]: Without dead ends: 4236 [2021-06-05 22:36:52,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 720.5ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:36:52,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4236 states. [2021-06-05 22:36:52,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4236 to 3808. [2021-06-05 22:36:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 4.185710533228264) internal successors, (15935), 3807 states have internal predecessors, (15935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 15935 transitions. [2021-06-05 22:36:52,421 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 15935 transitions. Word has length 23 [2021-06-05 22:36:52,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:52,421 INFO L482 AbstractCegarLoop]: Abstraction has 3808 states and 15935 transitions. [2021-06-05 22:36:52,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:52,421 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 15935 transitions. [2021-06-05 22:36:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:52,426 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:52,426 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:52,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable798 [2021-06-05 22:36:52,627 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:52,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:52,627 INFO L82 PathProgramCache]: Analyzing trace with hash 101786229, now seen corresponding path program 212 times [2021-06-05 22:36:52,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:52,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112377332] [2021-06-05 22:36:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:52,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:52,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112377332] [2021-06-05 22:36:52,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112377332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:52,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225986651] [2021-06-05 22:36:52,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:52,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:52,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:52,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:52,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:52,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:52,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:52,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:52,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:52,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:52,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:36:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:52,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225986651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:52,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:52,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:52,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875838628] [2021-06-05 22:36:52,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:52,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:52,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:52,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:52,941 INFO L87 Difference]: Start difference. First operand 3808 states and 15935 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:53,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:53,476 INFO L93 Difference]: Finished difference Result 4175 states and 17333 transitions. [2021-06-05 22:36:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:36:53,476 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:53,483 INFO L225 Difference]: With dead ends: 4175 [2021-06-05 22:36:53,483 INFO L226 Difference]: Without dead ends: 4149 [2021-06-05 22:36:53,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 492.8ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:36:53,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2021-06-05 22:36:53,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 3817. [2021-06-05 22:36:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3817 states, 3816 states have (on average 4.184224318658281) internal successors, (15967), 3816 states have internal predecessors, (15967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:53,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3817 states to 3817 states and 15967 transitions. [2021-06-05 22:36:53,532 INFO L78 Accepts]: Start accepts. Automaton has 3817 states and 15967 transitions. Word has length 23 [2021-06-05 22:36:53,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:53,532 INFO L482 AbstractCegarLoop]: Abstraction has 3817 states and 15967 transitions. [2021-06-05 22:36:53,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:53,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3817 states and 15967 transitions. [2021-06-05 22:36:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:53,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:53,538 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:53,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable800,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:53,738 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:53,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:53,738 INFO L82 PathProgramCache]: Analyzing trace with hash -939789839, now seen corresponding path program 213 times [2021-06-05 22:36:53,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:53,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448010517] [2021-06-05 22:36:53,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:53,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:53,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448010517] [2021-06-05 22:36:53,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448010517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:53,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386762107] [2021-06-05 22:36:53,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:53,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:36:53,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:53,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:53,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:53,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:53,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:53,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:53,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:53,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:53,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:36:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:54,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386762107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:54,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:54,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:54,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022999453] [2021-06-05 22:36:54,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:54,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:54,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:54,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:54,055 INFO L87 Difference]: Start difference. First operand 3817 states and 15967 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:54,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:54,550 INFO L93 Difference]: Finished difference Result 4135 states and 17177 transitions. [2021-06-05 22:36:54,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:36:54,551 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:54,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:54,558 INFO L225 Difference]: With dead ends: 4135 [2021-06-05 22:36:54,558 INFO L226 Difference]: Without dead ends: 4107 [2021-06-05 22:36:54,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 431.6ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:36:54,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2021-06-05 22:36:54,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3810. [2021-06-05 22:36:54,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3810 states, 3809 states have (on average 4.1856130217904965) internal successors, (15943), 3809 states have internal predecessors, (15943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3810 states to 3810 states and 15943 transitions. [2021-06-05 22:36:54,609 INFO L78 Accepts]: Start accepts. Automaton has 3810 states and 15943 transitions. Word has length 23 [2021-06-05 22:36:54,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:54,609 INFO L482 AbstractCegarLoop]: Abstraction has 3810 states and 15943 transitions. [2021-06-05 22:36:54,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:54,609 INFO L276 IsEmpty]: Start isEmpty. Operand 3810 states and 15943 transitions. [2021-06-05 22:36:54,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:54,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:54,614 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:54,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable802 [2021-06-05 22:36:54,815 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:54,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:54,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1226911191, now seen corresponding path program 214 times [2021-06-05 22:36:54,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:54,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19133959] [2021-06-05 22:36:54,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:54,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:54,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19133959] [2021-06-05 22:36:54,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19133959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:54,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097416899] [2021-06-05 22:36:54,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:54,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:54,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:54,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:54,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:55,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:55,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:55,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:55,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:55,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:55,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:36:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:55,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097416899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:55,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:55,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:55,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684410923] [2021-06-05 22:36:55,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:55,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:55,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:55,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:55,137 INFO L87 Difference]: Start difference. First operand 3810 states and 15943 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:55,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:55,794 INFO L93 Difference]: Finished difference Result 4162 states and 17284 transitions. [2021-06-05 22:36:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:36:55,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:55,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:55,802 INFO L225 Difference]: With dead ends: 4162 [2021-06-05 22:36:55,802 INFO L226 Difference]: Without dead ends: 4136 [2021-06-05 22:36:55,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 588.7ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:36:55,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4136 states. [2021-06-05 22:36:55,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4136 to 3814. [2021-06-05 22:36:55,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3814 states, 3813 states have (on average 4.185418305795961) internal successors, (15959), 3813 states have internal predecessors, (15959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3814 states to 3814 states and 15959 transitions. [2021-06-05 22:36:55,852 INFO L78 Accepts]: Start accepts. Automaton has 3814 states and 15959 transitions. Word has length 23 [2021-06-05 22:36:55,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:55,852 INFO L482 AbstractCegarLoop]: Abstraction has 3814 states and 15959 transitions. [2021-06-05 22:36:55,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:55,852 INFO L276 IsEmpty]: Start isEmpty. Operand 3814 states and 15959 transitions. [2021-06-05 22:36:55,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:55,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:55,858 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:56,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable804,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:56,058 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:56,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:56,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1720128577, now seen corresponding path program 215 times [2021-06-05 22:36:56,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:56,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362747393] [2021-06-05 22:36:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:56,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:56,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362747393] [2021-06-05 22:36:56,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362747393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:56,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686428657] [2021-06-05 22:36:56,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:56,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:36:56,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:56,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:56,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:56,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:56,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:56,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:56,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:56,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:56,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:36:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:56,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686428657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:56,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:56,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:56,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020600144] [2021-06-05 22:36:56,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:56,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:56,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:56,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:56,377 INFO L87 Difference]: Start difference. First operand 3814 states and 15959 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:57,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:57,160 INFO L93 Difference]: Finished difference Result 4142 states and 17206 transitions. [2021-06-05 22:36:57,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:36:57,160 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:57,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:57,168 INFO L225 Difference]: With dead ends: 4142 [2021-06-05 22:36:57,168 INFO L226 Difference]: Without dead ends: 4121 [2021-06-05 22:36:57,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 656.0ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:36:57,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-06-05 22:36:57,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 3810. [2021-06-05 22:36:57,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3810 states, 3809 states have (on average 4.1856130217904965) internal successors, (15943), 3809 states have internal predecessors, (15943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:57,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3810 states to 3810 states and 15943 transitions. [2021-06-05 22:36:57,221 INFO L78 Accepts]: Start accepts. Automaton has 3810 states and 15943 transitions. Word has length 23 [2021-06-05 22:36:57,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:57,222 INFO L482 AbstractCegarLoop]: Abstraction has 3810 states and 15943 transitions. [2021-06-05 22:36:57,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:57,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3810 states and 15943 transitions. [2021-06-05 22:36:57,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:57,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:57,227 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:57,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:57,431 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:57,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:57,431 INFO L82 PathProgramCache]: Analyzing trace with hash -785352321, now seen corresponding path program 216 times [2021-06-05 22:36:57,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:57,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446476793] [2021-06-05 22:36:57,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:57,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:57,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:57,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446476793] [2021-06-05 22:36:57,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446476793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:57,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549764918] [2021-06-05 22:36:57,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:57,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:36:57,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:57,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:57,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:57,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:57,652 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:36:57,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 22:36:57,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:57,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:57,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:57,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:49 [2021-06-05 22:36:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:57,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549764918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:57,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:57,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:36:57,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610914788] [2021-06-05 22:36:57,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:36:57,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:57,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:36:57,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:36:57,769 INFO L87 Difference]: Start difference. First operand 3810 states and 15943 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:58,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:58,410 INFO L93 Difference]: Finished difference Result 4150 states and 17239 transitions. [2021-06-05 22:36:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:36:58,411 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:58,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:58,418 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 22:36:58,418 INFO L226 Difference]: Without dead ends: 4125 [2021-06-05 22:36:58,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 454.9ms TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:36:58,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2021-06-05 22:36:58,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 3814. [2021-06-05 22:36:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3814 states, 3813 states have (on average 4.185418305795961) internal successors, (15959), 3813 states have internal predecessors, (15959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:58,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3814 states to 3814 states and 15959 transitions. [2021-06-05 22:36:58,468 INFO L78 Accepts]: Start accepts. Automaton has 3814 states and 15959 transitions. Word has length 23 [2021-06-05 22:36:58,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:58,468 INFO L482 AbstractCegarLoop]: Abstraction has 3814 states and 15959 transitions. [2021-06-05 22:36:58,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:58,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3814 states and 15959 transitions. [2021-06-05 22:36:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:58,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:58,473 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:58,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable808 [2021-06-05 22:36:58,674 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:58,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:58,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1798044853, now seen corresponding path program 217 times [2021-06-05 22:36:58,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:58,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568285485] [2021-06-05 22:36:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:58,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:58,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568285485] [2021-06-05 22:36:58,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568285485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:58,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354273229] [2021-06-05 22:36:58,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:58,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:36:58,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:58,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:58,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:58,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:58,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:58,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:58,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:36:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:58,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354273229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:58,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:58,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:36:58,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400617251] [2021-06-05 22:36:58,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:36:58,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:58,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:36:58,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:36:58,984 INFO L87 Difference]: Start difference. First operand 3814 states and 15959 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:59,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:59,729 INFO L93 Difference]: Finished difference Result 4159 states and 17276 transitions. [2021-06-05 22:36:59,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:36:59,730 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:36:59,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:59,737 INFO L225 Difference]: With dead ends: 4159 [2021-06-05 22:36:59,737 INFO L226 Difference]: Without dead ends: 4138 [2021-06-05 22:36:59,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 619.3ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:36:59,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2021-06-05 22:36:59,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 3808. [2021-06-05 22:36:59,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 4.185710533228264) internal successors, (15935), 3807 states have internal predecessors, (15935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 15935 transitions. [2021-06-05 22:36:59,791 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 15935 transitions. Word has length 23 [2021-06-05 22:36:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:59,791 INFO L482 AbstractCegarLoop]: Abstraction has 3808 states and 15935 transitions. [2021-06-05 22:36:59,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 15935 transitions. [2021-06-05 22:36:59,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:36:59,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:59,797 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:59,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable812,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:59,997 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:59,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:59,997 INFO L82 PathProgramCache]: Analyzing trace with hash -649178733, now seen corresponding path program 218 times [2021-06-05 22:36:59,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:59,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42474591] [2021-06-05 22:36:59,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:00,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:00,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42474591] [2021-06-05 22:37:00,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42474591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:00,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990796362] [2021-06-05 22:37:00,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:00,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:00,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:00,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:00,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:00,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:00,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:37:00,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:00,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:00,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:00,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:37:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:00,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990796362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:00,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:00,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:00,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764692602] [2021-06-05 22:37:00,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:00,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:00,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:00,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:00,284 INFO L87 Difference]: Start difference. First operand 3808 states and 15935 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:00,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:00,882 INFO L93 Difference]: Finished difference Result 4333 states and 17949 transitions. [2021-06-05 22:37:00,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:37:00,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:00,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:00,889 INFO L225 Difference]: With dead ends: 4333 [2021-06-05 22:37:00,889 INFO L226 Difference]: Without dead ends: 4298 [2021-06-05 22:37:00,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 445.7ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:37:00,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2021-06-05 22:37:00,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 3823. [2021-06-05 22:37:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3822 states have (on average 4.185243328100471) internal successors, (15996), 3822 states have internal predecessors, (15996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:00,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 15996 transitions. [2021-06-05 22:37:00,940 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 15996 transitions. Word has length 23 [2021-06-05 22:37:00,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:00,940 INFO L482 AbstractCegarLoop]: Abstraction has 3823 states and 15996 transitions. [2021-06-05 22:37:00,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:00,940 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 15996 transitions. [2021-06-05 22:37:00,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:00,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:00,945 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:01,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable814 [2021-06-05 22:37:01,146 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:01,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:01,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1096105303, now seen corresponding path program 219 times [2021-06-05 22:37:01,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:01,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367538655] [2021-06-05 22:37:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:01,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:01,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367538655] [2021-06-05 22:37:01,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367538655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:01,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517272582] [2021-06-05 22:37:01,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:01,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:37:01,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:01,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:01,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:01,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:01,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:37:01,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:01,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:01,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:01,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:37:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:01,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517272582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:01,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:01,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:01,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410645888] [2021-06-05 22:37:01,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:01,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:01,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:01,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:01,472 INFO L87 Difference]: Start difference. First operand 3823 states and 15996 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:02,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:02,082 INFO L93 Difference]: Finished difference Result 4185 states and 17367 transitions. [2021-06-05 22:37:02,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:37:02,082 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:02,089 INFO L225 Difference]: With dead ends: 4185 [2021-06-05 22:37:02,089 INFO L226 Difference]: Without dead ends: 4159 [2021-06-05 22:37:02,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 478.3ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:37:02,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2021-06-05 22:37:02,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 3830. [2021-06-05 22:37:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3830 states, 3829 states have (on average 4.183860015669888) internal successors, (16020), 3829 states have internal predecessors, (16020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 16020 transitions. [2021-06-05 22:37:02,140 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 16020 transitions. Word has length 23 [2021-06-05 22:37:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:02,140 INFO L482 AbstractCegarLoop]: Abstraction has 3830 states and 16020 transitions. [2021-06-05 22:37:02,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 16020 transitions. [2021-06-05 22:37:02,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:02,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:02,145 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:02,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable816,374 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:02,345 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:02,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:02,345 INFO L82 PathProgramCache]: Analyzing trace with hash 54529235, now seen corresponding path program 220 times [2021-06-05 22:37:02,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:02,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417405527] [2021-06-05 22:37:02,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:02,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:02,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417405527] [2021-06-05 22:37:02,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417405527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:02,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914039965] [2021-06-05 22:37:02,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:02,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:02,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:02,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:02,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:02,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:02,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:37:02,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:02,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:02,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:02,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:37:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:02,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914039965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:02,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:02,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:02,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075907373] [2021-06-05 22:37:02,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:02,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:02,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:02,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:02,645 INFO L87 Difference]: Start difference. First operand 3830 states and 16020 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:03,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:03,140 INFO L93 Difference]: Finished difference Result 4145 states and 17211 transitions. [2021-06-05 22:37:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:37:03,140 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:03,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:03,147 INFO L225 Difference]: With dead ends: 4145 [2021-06-05 22:37:03,147 INFO L226 Difference]: Without dead ends: 4113 [2021-06-05 22:37:03,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 410.3ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:37:03,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4113 states. [2021-06-05 22:37:03,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4113 to 3823. [2021-06-05 22:37:03,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3822 states have (on average 4.186551543694401) internal successors, (16001), 3822 states have internal predecessors, (16001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 16001 transitions. [2021-06-05 22:37:03,197 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 16001 transitions. Word has length 23 [2021-06-05 22:37:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:03,197 INFO L482 AbstractCegarLoop]: Abstraction has 3823 states and 16001 transitions. [2021-06-05 22:37:03,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:03,197 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 16001 transitions. [2021-06-05 22:37:03,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:03,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:03,202 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:03,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable818,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:03,402 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:03,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:03,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1110874207, now seen corresponding path program 221 times [2021-06-05 22:37:03,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:03,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538165704] [2021-06-05 22:37:03,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:03,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:03,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538165704] [2021-06-05 22:37:03,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538165704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:03,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519960604] [2021-06-05 22:37:03,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:03,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:37:03,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:03,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:03,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:03,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:03,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:37:03,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:03,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:03,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:03,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:37:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:03,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519960604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:03,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:03,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:03,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723327070] [2021-06-05 22:37:03,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:03,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:03,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:03,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:03,699 INFO L87 Difference]: Start difference. First operand 3823 states and 16001 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:04,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:04,360 INFO L93 Difference]: Finished difference Result 4349 states and 18016 transitions. [2021-06-05 22:37:04,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:37:04,360 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:04,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:04,367 INFO L225 Difference]: With dead ends: 4349 [2021-06-05 22:37:04,367 INFO L226 Difference]: Without dead ends: 4314 [2021-06-05 22:37:04,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 468.8ms TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:37:04,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4314 states. [2021-06-05 22:37:04,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4314 to 3831. [2021-06-05 22:37:04,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 4.18668407310705) internal successors, (16035), 3830 states have internal predecessors, (16035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 16035 transitions. [2021-06-05 22:37:04,417 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 16035 transitions. Word has length 23 [2021-06-05 22:37:04,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:04,417 INFO L482 AbstractCegarLoop]: Abstraction has 3831 states and 16035 transitions. [2021-06-05 22:37:04,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:04,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 16035 transitions. [2021-06-05 22:37:04,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:04,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:04,423 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:04,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-06-05 22:37:04,623 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:04,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:04,623 INFO L82 PathProgramCache]: Analyzing trace with hash 306474983, now seen corresponding path program 222 times [2021-06-05 22:37:04,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:04,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388016405] [2021-06-05 22:37:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:04,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:04,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388016405] [2021-06-05 22:37:04,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388016405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:04,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62869577] [2021-06-05 22:37:04,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:04,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:37:04,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:04,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:37:04,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:04,851 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:37:04,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 22:37:04,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:04,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:04,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:04,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:38 [2021-06-05 22:37:04,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:04,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62869577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:04,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:04,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:37:04,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094606880] [2021-06-05 22:37:04,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:37:04,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:04,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:37:04,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:37:04,956 INFO L87 Difference]: Start difference. First operand 3831 states and 16035 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:05,771 INFO L93 Difference]: Finished difference Result 4235 states and 17569 transitions. [2021-06-05 22:37:05,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:37:05,771 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:05,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:05,779 INFO L225 Difference]: With dead ends: 4235 [2021-06-05 22:37:05,779 INFO L226 Difference]: Without dead ends: 4209 [2021-06-05 22:37:05,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 594.0ms TimeCoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:37:05,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4209 states. [2021-06-05 22:37:05,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4209 to 3835. [2021-06-05 22:37:05,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.1864893062076165) internal successors, (16051), 3834 states have internal predecessors, (16051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:05,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16051 transitions. [2021-06-05 22:37:05,828 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16051 transitions. Word has length 23 [2021-06-05 22:37:05,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:05,829 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16051 transitions. [2021-06-05 22:37:05,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:05,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16051 transitions. [2021-06-05 22:37:05,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:05,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:05,834 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:06,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable822 [2021-06-05 22:37:06,034 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:06,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:06,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1920041717, now seen corresponding path program 223 times [2021-06-05 22:37:06,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:06,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609497172] [2021-06-05 22:37:06,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:06,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:06,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609497172] [2021-06-05 22:37:06,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609497172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:06,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553138304] [2021-06-05 22:37:06,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:06,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:06,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:06,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:06,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:06,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:06,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:06,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:06,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:37:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:06,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553138304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:06,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:06,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:06,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935321306] [2021-06-05 22:37:06,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:06,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:06,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:06,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:06,352 INFO L87 Difference]: Start difference. First operand 3835 states and 16051 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:07,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:07,127 INFO L93 Difference]: Finished difference Result 4298 states and 17828 transitions. [2021-06-05 22:37:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:37:07,127 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:07,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:07,135 INFO L225 Difference]: With dead ends: 4298 [2021-06-05 22:37:07,135 INFO L226 Difference]: Without dead ends: 4277 [2021-06-05 22:37:07,135 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 691.7ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:37:07,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4277 states. [2021-06-05 22:37:07,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4277 to 3823. [2021-06-05 22:37:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3822 states have (on average 4.186551543694401) internal successors, (16001), 3822 states have internal predecessors, (16001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 16001 transitions. [2021-06-05 22:37:07,187 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 16001 transitions. Word has length 23 [2021-06-05 22:37:07,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:07,187 INFO L482 AbstractCegarLoop]: Abstraction has 3823 states and 16001 transitions. [2021-06-05 22:37:07,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:07,187 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 16001 transitions. [2021-06-05 22:37:07,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:07,192 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:07,192 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:07,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable826,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:07,393 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:07,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2011186791, now seen corresponding path program 224 times [2021-06-05 22:37:07,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:07,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015811782] [2021-06-05 22:37:07,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:07,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:07,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015811782] [2021-06-05 22:37:07,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015811782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:07,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574067006] [2021-06-05 22:37:07,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:07,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:07,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:07,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:07,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:07,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:07,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:07,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:07,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:07,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:07,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:37:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:07,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574067006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:07,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:07,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:07,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982670049] [2021-06-05 22:37:07,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:07,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:07,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:07,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:07,712 INFO L87 Difference]: Start difference. First operand 3823 states and 16001 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:08,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:08,346 INFO L93 Difference]: Finished difference Result 4154 states and 17253 transitions. [2021-06-05 22:37:08,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:37:08,347 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:08,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:08,354 INFO L225 Difference]: With dead ends: 4154 [2021-06-05 22:37:08,354 INFO L226 Difference]: Without dead ends: 4128 [2021-06-05 22:37:08,355 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 489.7ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:37:08,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-05 22:37:08,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3832. [2021-06-05 22:37:08,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3832 states, 3831 states have (on average 4.185069172539807) internal successors, (16033), 3831 states have internal predecessors, (16033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 16033 transitions. [2021-06-05 22:37:08,402 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 16033 transitions. Word has length 23 [2021-06-05 22:37:08,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:08,402 INFO L482 AbstractCegarLoop]: Abstraction has 3832 states and 16033 transitions. [2021-06-05 22:37:08,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:08,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 16033 transitions. [2021-06-05 22:37:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:08,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:08,407 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:08,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:08,608 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:08,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:08,608 INFO L82 PathProgramCache]: Analyzing trace with hash 969610723, now seen corresponding path program 225 times [2021-06-05 22:37:08,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:08,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904933979] [2021-06-05 22:37:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:08,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:08,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904933979] [2021-06-05 22:37:08,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904933979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:08,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913897013] [2021-06-05 22:37:08,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:08,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:37:08,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:08,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:08,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:08,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:08,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:08,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:08,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:08,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:08,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:37:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:08,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913897013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:08,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:08,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:08,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496104685] [2021-06-05 22:37:08,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:08,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:08,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:08,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:08,918 INFO L87 Difference]: Start difference. First operand 3832 states and 16033 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:09,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:09,353 INFO L93 Difference]: Finished difference Result 4114 states and 17097 transitions. [2021-06-05 22:37:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:37:09,353 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:09,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:09,360 INFO L225 Difference]: With dead ends: 4114 [2021-06-05 22:37:09,360 INFO L226 Difference]: Without dead ends: 4086 [2021-06-05 22:37:09,360 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 419.5ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:37:09,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-06-05 22:37:09,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 3825. [2021-06-05 22:37:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3824 states have (on average 4.1864539748953975) internal successors, (16009), 3824 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:09,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 16009 transitions. [2021-06-05 22:37:09,411 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 16009 transitions. Word has length 23 [2021-06-05 22:37:09,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:09,411 INFO L482 AbstractCegarLoop]: Abstraction has 3825 states and 16009 transitions. [2021-06-05 22:37:09,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:09,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 16009 transitions. [2021-06-05 22:37:09,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:09,416 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:09,416 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:09,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable830,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:09,617 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:09,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:09,617 INFO L82 PathProgramCache]: Analyzing trace with hash 682489371, now seen corresponding path program 226 times [2021-06-05 22:37:09,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:09,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575370024] [2021-06-05 22:37:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:09,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:09,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575370024] [2021-06-05 22:37:09,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575370024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:09,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881503430] [2021-06-05 22:37:09,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:09,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:09,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:09,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:09,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:09,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:09,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:09,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:09,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:09,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:09,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:37:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:09,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881503430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:09,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:09,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:09,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400069411] [2021-06-05 22:37:09,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:09,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:09,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:09,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:09,930 INFO L87 Difference]: Start difference. First operand 3825 states and 16009 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:10,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:10,567 INFO L93 Difference]: Finished difference Result 4141 states and 17204 transitions. [2021-06-05 22:37:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:37:10,567 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:10,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:10,594 INFO L225 Difference]: With dead ends: 4141 [2021-06-05 22:37:10,594 INFO L226 Difference]: Without dead ends: 4115 [2021-06-05 22:37:10,594 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 571.2ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:37:10,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4115 states. [2021-06-05 22:37:10,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4115 to 3829. [2021-06-05 22:37:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3829 states, 3828 states have (on average 4.186259143155695) internal successors, (16025), 3828 states have internal predecessors, (16025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:10,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3829 states to 3829 states and 16025 transitions. [2021-06-05 22:37:10,641 INFO L78 Accepts]: Start accepts. Automaton has 3829 states and 16025 transitions. Word has length 23 [2021-06-05 22:37:10,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:10,641 INFO L482 AbstractCegarLoop]: Abstraction has 3829 states and 16025 transitions. [2021-06-05 22:37:10,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:10,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3829 states and 16025 transitions. [2021-06-05 22:37:10,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:10,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:10,646 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:10,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable832 [2021-06-05 22:37:10,846 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:10,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:10,847 INFO L82 PathProgramCache]: Analyzing trace with hash 189271985, now seen corresponding path program 227 times [2021-06-05 22:37:10,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:10,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076990639] [2021-06-05 22:37:10,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:10,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:10,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076990639] [2021-06-05 22:37:10,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076990639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:10,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496591418] [2021-06-05 22:37:10,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:10,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:37:10,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:10,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:10,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:11,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:11,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:11,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:11,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:11,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:11,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:37:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:11,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496591418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:11,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:11,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:11,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22126772] [2021-06-05 22:37:11,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:11,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:11,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:11,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:11,160 INFO L87 Difference]: Start difference. First operand 3829 states and 16025 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:11,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:11,861 INFO L93 Difference]: Finished difference Result 4146 states and 17225 transitions. [2021-06-05 22:37:11,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:37:11,861 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:11,868 INFO L225 Difference]: With dead ends: 4146 [2021-06-05 22:37:11,868 INFO L226 Difference]: Without dead ends: 4125 [2021-06-05 22:37:11,869 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 647.7ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:37:11,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2021-06-05 22:37:11,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 3825. [2021-06-05 22:37:11,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3824 states have (on average 4.1864539748953975) internal successors, (16009), 3824 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 16009 transitions. [2021-06-05 22:37:11,917 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 16009 transitions. Word has length 23 [2021-06-05 22:37:11,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:11,917 INFO L482 AbstractCegarLoop]: Abstraction has 3825 states and 16009 transitions. [2021-06-05 22:37:11,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:11,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 16009 transitions. [2021-06-05 22:37:11,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:11,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:11,922 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:12,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable834,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:12,125 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:12,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:12,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1124048241, now seen corresponding path program 228 times [2021-06-05 22:37:12,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:12,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295513302] [2021-06-05 22:37:12,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:12,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:12,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295513302] [2021-06-05 22:37:12,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295513302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:12,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367345930] [2021-06-05 22:37:12,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:12,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:37:12,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:12,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:12,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:12,340 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:37:12,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 22:37:12,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:12,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:12,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:12,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:41 [2021-06-05 22:37:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:12,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367345930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:12,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:12,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:37:12,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705522407] [2021-06-05 22:37:12,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:37:12,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:12,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:37:12,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:37:12,466 INFO L87 Difference]: Start difference. First operand 3825 states and 16009 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:13,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:13,004 INFO L93 Difference]: Finished difference Result 4148 states and 17235 transitions. [2021-06-05 22:37:13,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:37:13,004 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:13,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:13,011 INFO L225 Difference]: With dead ends: 4148 [2021-06-05 22:37:13,011 INFO L226 Difference]: Without dead ends: 4123 [2021-06-05 22:37:13,011 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 451.2ms TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:37:13,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-06-05 22:37:13,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3825. [2021-06-05 22:37:13,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3824 states have (on average 4.1864539748953975) internal successors, (16009), 3824 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 16009 transitions. [2021-06-05 22:37:13,060 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 16009 transitions. Word has length 23 [2021-06-05 22:37:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:13,060 INFO L482 AbstractCegarLoop]: Abstraction has 3825 states and 16009 transitions. [2021-06-05 22:37:13,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 16009 transitions. [2021-06-05 22:37:13,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:13,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:13,065 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:13,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable836 [2021-06-05 22:37:13,266 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:13,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:13,266 INFO L82 PathProgramCache]: Analyzing trace with hash 111355709, now seen corresponding path program 229 times [2021-06-05 22:37:13,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:13,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870136244] [2021-06-05 22:37:13,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:13,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:13,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870136244] [2021-06-05 22:37:13,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870136244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:13,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557026473] [2021-06-05 22:37:13,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:13,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:13,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:13,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:13,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:13,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:13,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:13,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:13,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:37:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:13,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557026473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:13,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:13,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:13,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031307364] [2021-06-05 22:37:13,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:13,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:13,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:13,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:13,583 INFO L87 Difference]: Start difference. First operand 3825 states and 16009 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:14,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:14,285 INFO L93 Difference]: Finished difference Result 4169 states and 17319 transitions. [2021-06-05 22:37:14,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:37:14,286 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:14,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:14,294 INFO L225 Difference]: With dead ends: 4169 [2021-06-05 22:37:14,294 INFO L226 Difference]: Without dead ends: 4148 [2021-06-05 22:37:14,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 610.8ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:37:14,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4148 states. [2021-06-05 22:37:14,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4148 to 3825. [2021-06-05 22:37:14,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3824 states have (on average 4.1864539748953975) internal successors, (16009), 3824 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 16009 transitions. [2021-06-05 22:37:14,345 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 16009 transitions. Word has length 23 [2021-06-05 22:37:14,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:14,345 INFO L482 AbstractCegarLoop]: Abstraction has 3825 states and 16009 transitions. [2021-06-05 22:37:14,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 16009 transitions. [2021-06-05 22:37:14,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:14,351 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:14,351 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:14,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-06-05 22:37:14,551 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:14,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:14,552 INFO L82 PathProgramCache]: Analyzing trace with hash 203137755, now seen corresponding path program 230 times [2021-06-05 22:37:14,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:14,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747831209] [2021-06-05 22:37:14,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:14,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:14,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747831209] [2021-06-05 22:37:14,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747831209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:14,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906962905] [2021-06-05 22:37:14,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:14,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:14,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:14,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:14,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:14,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:14,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:37:14,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:14,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:14,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:14,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:37:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:14,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906962905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:14,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:14,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:14,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785799356] [2021-06-05 22:37:14,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:14,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:14,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:14,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:14,847 INFO L87 Difference]: Start difference. First operand 3825 states and 16009 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:15,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:15,640 INFO L93 Difference]: Finished difference Result 4275 states and 17767 transitions. [2021-06-05 22:37:15,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:37:15,640 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:15,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:15,648 INFO L225 Difference]: With dead ends: 4275 [2021-06-05 22:37:15,648 INFO L226 Difference]: Without dead ends: 4253 [2021-06-05 22:37:15,648 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 518.0ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:37:15,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4253 states. [2021-06-05 22:37:15,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4253 to 3831. [2021-06-05 22:37:15,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 4.186945169712794) internal successors, (16036), 3830 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:15,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 16036 transitions. [2021-06-05 22:37:15,699 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 16036 transitions. Word has length 23 [2021-06-05 22:37:15,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:15,699 INFO L482 AbstractCegarLoop]: Abstraction has 3831 states and 16036 transitions. [2021-06-05 22:37:15,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:15,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 16036 transitions. [2021-06-05 22:37:15,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:15,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:15,704 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:15,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable842,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:15,904 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:15,905 INFO L82 PathProgramCache]: Analyzing trace with hash 788471707, now seen corresponding path program 231 times [2021-06-05 22:37:15,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:15,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231212572] [2021-06-05 22:37:15,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:15,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:15,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231212572] [2021-06-05 22:37:15,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231212572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:15,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608274417] [2021-06-05 22:37:15,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:16,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:37:16,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:16,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:16,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:16,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:16,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:16,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:16,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:16,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:16,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:37:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:16,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608274417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:16,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:16,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:16,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239822796] [2021-06-05 22:37:16,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:16,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:16,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:16,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:16,199 INFO L87 Difference]: Start difference. First operand 3831 states and 16036 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:16,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:16,825 INFO L93 Difference]: Finished difference Result 4212 states and 17485 transitions. [2021-06-05 22:37:16,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:37:16,825 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:16,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:16,832 INFO L225 Difference]: With dead ends: 4212 [2021-06-05 22:37:16,832 INFO L226 Difference]: Without dead ends: 4186 [2021-06-05 22:37:16,832 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 510.2ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:37:16,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2021-06-05 22:37:16,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 3835. [2021-06-05 22:37:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.186750130412102) internal successors, (16052), 3834 states have internal predecessors, (16052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16052 transitions. [2021-06-05 22:37:16,881 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16052 transitions. Word has length 23 [2021-06-05 22:37:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:16,882 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16052 transitions. [2021-06-05 22:37:16,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16052 transitions. [2021-06-05 22:37:16,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:16,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:16,887 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:17,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-05 22:37:17,087 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:17,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:17,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1892928855, now seen corresponding path program 232 times [2021-06-05 22:37:17,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:17,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648310108] [2021-06-05 22:37:17,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:17,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:17,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648310108] [2021-06-05 22:37:17,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648310108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:17,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914702469] [2021-06-05 22:37:17,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:17,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:17,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:17,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:17,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:17,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:17,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:17,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:17,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:17,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:17,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:37:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:17,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914702469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:17,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:17,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:17,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714879317] [2021-06-05 22:37:17,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:17,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:17,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:17,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:17,386 INFO L87 Difference]: Start difference. First operand 3835 states and 16052 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:18,322 INFO L93 Difference]: Finished difference Result 4196 states and 17433 transitions. [2021-06-05 22:37:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:37:18,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:18,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:18,330 INFO L225 Difference]: With dead ends: 4196 [2021-06-05 22:37:18,330 INFO L226 Difference]: Without dead ends: 4175 [2021-06-05 22:37:18,330 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 721.6ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:37:18,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4175 states. [2021-06-05 22:37:18,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4175 to 3827. [2021-06-05 22:37:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3826 states have (on average 4.186617877679038) internal successors, (16018), 3826 states have internal predecessors, (16018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:18,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 16018 transitions. [2021-06-05 22:37:18,385 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 16018 transitions. Word has length 23 [2021-06-05 22:37:18,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:18,385 INFO L482 AbstractCegarLoop]: Abstraction has 3827 states and 16018 transitions. [2021-06-05 22:37:18,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:18,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 16018 transitions. [2021-06-05 22:37:18,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:18,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:18,390 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:18,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable846,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:18,591 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:18,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:18,591 INFO L82 PathProgramCache]: Analyzing trace with hash -24083625, now seen corresponding path program 233 times [2021-06-05 22:37:18,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:18,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096142369] [2021-06-05 22:37:18,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:18,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:18,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096142369] [2021-06-05 22:37:18,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096142369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:18,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596307868] [2021-06-05 22:37:18,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:18,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:37:18,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:18,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:18,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:18,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:18,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:37:18,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:18,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:18,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:18,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:37:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:18,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596307868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:18,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:18,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:18,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298195254] [2021-06-05 22:37:18,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:18,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:18,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:18,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:18,884 INFO L87 Difference]: Start difference. First operand 3827 states and 16018 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:19,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:19,528 INFO L93 Difference]: Finished difference Result 4286 states and 17806 transitions. [2021-06-05 22:37:19,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:37:19,528 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:19,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:19,536 INFO L225 Difference]: With dead ends: 4286 [2021-06-05 22:37:19,536 INFO L226 Difference]: Without dead ends: 4264 [2021-06-05 22:37:19,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 498.2ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:37:19,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2021-06-05 22:37:19,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 3831. [2021-06-05 22:37:19,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 4.186945169712794) internal successors, (16036), 3830 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 16036 transitions. [2021-06-05 22:37:19,588 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 16036 transitions. Word has length 23 [2021-06-05 22:37:19,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:19,588 INFO L482 AbstractCegarLoop]: Abstraction has 3831 states and 16036 transitions. [2021-06-05 22:37:19,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:19,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 16036 transitions. [2021-06-05 22:37:19,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:19,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:19,593 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:19,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable848 [2021-06-05 22:37:19,794 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:19,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:19,794 INFO L82 PathProgramCache]: Analyzing trace with hash 489443227, now seen corresponding path program 234 times [2021-06-05 22:37:19,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:19,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896197019] [2021-06-05 22:37:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:19,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:19,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896197019] [2021-06-05 22:37:19,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896197019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:19,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766268549] [2021-06-05 22:37:19,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:19,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:37:19,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:19,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:37:19,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:20,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:20,065 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:37:20,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:37:20,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:20,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:20,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:20,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 22:37:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:20,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766268549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:20,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:20,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:37:20,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320180975] [2021-06-05 22:37:20,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:37:20,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:20,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:37:20,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:37:20,196 INFO L87 Difference]: Start difference. First operand 3831 states and 16036 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:20,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:20,802 INFO L93 Difference]: Finished difference Result 4224 states and 17548 transitions. [2021-06-05 22:37:20,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:37:20,802 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:20,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:20,809 INFO L225 Difference]: With dead ends: 4224 [2021-06-05 22:37:20,809 INFO L226 Difference]: Without dead ends: 4199 [2021-06-05 22:37:20,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 514.5ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:37:20,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2021-06-05 22:37:20,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 3835. [2021-06-05 22:37:20,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.186750130412102) internal successors, (16052), 3834 states have internal predecessors, (16052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:20,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16052 transitions. [2021-06-05 22:37:20,860 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16052 transitions. Word has length 23 [2021-06-05 22:37:20,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:20,860 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16052 transitions. [2021-06-05 22:37:20,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:20,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16052 transitions. [2021-06-05 22:37:20,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:20,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:20,865 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:21,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-06-05 22:37:21,066 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:21,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:21,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1565154383, now seen corresponding path program 235 times [2021-06-05 22:37:21,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:21,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703530874] [2021-06-05 22:37:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:21,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:21,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703530874] [2021-06-05 22:37:21,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703530874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:21,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200643143] [2021-06-05 22:37:21,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:21,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:21,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:21,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:21,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:21,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:21,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:21,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:21,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:37:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:21,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200643143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:21,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:21,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:21,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211623028] [2021-06-05 22:37:21,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:21,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:21,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:21,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:21,368 INFO L87 Difference]: Start difference. First operand 3835 states and 16052 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:22,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:22,215 INFO L93 Difference]: Finished difference Result 4220 states and 17527 transitions. [2021-06-05 22:37:22,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:37:22,215 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:22,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:22,223 INFO L225 Difference]: With dead ends: 4220 [2021-06-05 22:37:22,223 INFO L226 Difference]: Without dead ends: 4199 [2021-06-05 22:37:22,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 711.8ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:37:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2021-06-05 22:37:22,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 3827. [2021-06-05 22:37:22,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3826 states have (on average 4.186617877679038) internal successors, (16018), 3826 states have internal predecessors, (16018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 16018 transitions. [2021-06-05 22:37:22,272 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 16018 transitions. Word has length 23 [2021-06-05 22:37:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:22,272 INFO L482 AbstractCegarLoop]: Abstraction has 3827 states and 16018 transitions. [2021-06-05 22:37:22,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 16018 transitions. [2021-06-05 22:37:22,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:22,277 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:22,277 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:22,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable854 [2021-06-05 22:37:22,478 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:22,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:22,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1846150235, now seen corresponding path program 236 times [2021-06-05 22:37:22,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:22,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156423534] [2021-06-05 22:37:22,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:22,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:22,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156423534] [2021-06-05 22:37:22,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156423534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:22,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967606281] [2021-06-05 22:37:22,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:22,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:22,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:22,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:22,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:22,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:22,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:22,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:22,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:22,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:22,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:37:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:22,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967606281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:22,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:22,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:22,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608693609] [2021-06-05 22:37:22,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:22,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:22,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:22,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:22,800 INFO L87 Difference]: Start difference. First operand 3827 states and 16018 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:23,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:23,295 INFO L93 Difference]: Finished difference Result 4116 states and 17113 transitions. [2021-06-05 22:37:23,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:37:23,296 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:23,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:23,303 INFO L225 Difference]: With dead ends: 4116 [2021-06-05 22:37:23,303 INFO L226 Difference]: Without dead ends: 4090 [2021-06-05 22:37:23,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:37:23,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2021-06-05 22:37:23,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3836. [2021-06-05 22:37:23,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3836 states, 3835 states have (on average 4.185136897001303) internal successors, (16050), 3835 states have internal predecessors, (16050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3836 states to 3836 states and 16050 transitions. [2021-06-05 22:37:23,351 INFO L78 Accepts]: Start accepts. Automaton has 3836 states and 16050 transitions. Word has length 23 [2021-06-05 22:37:23,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:23,351 INFO L482 AbstractCegarLoop]: Abstraction has 3836 states and 16050 transitions. [2021-06-05 22:37:23,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:23,352 INFO L276 IsEmpty]: Start isEmpty. Operand 3836 states and 16050 transitions. [2021-06-05 22:37:23,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:23,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:23,357 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:23,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:23,557 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:23,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:23,557 INFO L82 PathProgramCache]: Analyzing trace with hash 804574167, now seen corresponding path program 237 times [2021-06-05 22:37:23,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:23,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245145144] [2021-06-05 22:37:23,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:23,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:23,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245145144] [2021-06-05 22:37:23,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245145144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:23,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973296744] [2021-06-05 22:37:23,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:23,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:37:23,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:23,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:37:23,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:23,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:23,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:37:23,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:23,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:23,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:23,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:37:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:23,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973296744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:23,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:23,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:23,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719102252] [2021-06-05 22:37:23,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:23,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:23,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:23,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:23,852 INFO L87 Difference]: Start difference. First operand 3836 states and 16050 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:24,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:24,330 INFO L93 Difference]: Finished difference Result 4145 states and 17217 transitions. [2021-06-05 22:37:24,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:37:24,330 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:24,337 INFO L225 Difference]: With dead ends: 4145 [2021-06-05 22:37:24,337 INFO L226 Difference]: Without dead ends: 4117 [2021-06-05 22:37:24,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 350.3ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:37:24,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4117 states. [2021-06-05 22:37:24,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4117 to 3829. [2021-06-05 22:37:24,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3829 states, 3828 states have (on average 4.186520376175548) internal successors, (16026), 3828 states have internal predecessors, (16026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3829 states to 3829 states and 16026 transitions. [2021-06-05 22:37:24,406 INFO L78 Accepts]: Start accepts. Automaton has 3829 states and 16026 transitions. Word has length 23 [2021-06-05 22:37:24,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:24,406 INFO L482 AbstractCegarLoop]: Abstraction has 3829 states and 16026 transitions. [2021-06-05 22:37:24,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:24,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3829 states and 16026 transitions. [2021-06-05 22:37:24,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:24,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:24,412 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:24,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable858 [2021-06-05 22:37:24,612 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:24,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:24,613 INFO L82 PathProgramCache]: Analyzing trace with hash 517452815, now seen corresponding path program 238 times [2021-06-05 22:37:24,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:24,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551569566] [2021-06-05 22:37:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:24,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:24,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551569566] [2021-06-05 22:37:24,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551569566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:24,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547314370] [2021-06-05 22:37:24,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:24,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:24,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:24,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:24,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:24,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:24,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:24,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:24,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:24,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:24,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:37:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:24,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547314370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:24,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:24,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:24,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125435485] [2021-06-05 22:37:24,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:24,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:24,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:24,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:24,925 INFO L87 Difference]: Start difference. First operand 3829 states and 16026 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:25,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:25,452 INFO L93 Difference]: Finished difference Result 4136 states and 17183 transitions. [2021-06-05 22:37:25,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:37:25,453 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:25,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:25,460 INFO L225 Difference]: With dead ends: 4136 [2021-06-05 22:37:25,460 INFO L226 Difference]: Without dead ends: 4110 [2021-06-05 22:37:25,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 478.1ms TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:37:25,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4110 states. [2021-06-05 22:37:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4110 to 3833. [2021-06-05 22:37:25,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.1863256784968685) internal successors, (16042), 3832 states have internal predecessors, (16042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:25,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 16042 transitions. [2021-06-05 22:37:25,509 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 16042 transitions. Word has length 23 [2021-06-05 22:37:25,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:25,509 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 16042 transitions. [2021-06-05 22:37:25,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:25,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 16042 transitions. [2021-06-05 22:37:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:25,514 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:25,514 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:25,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable859,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:25,715 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:25,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:25,715 INFO L82 PathProgramCache]: Analyzing trace with hash 24235429, now seen corresponding path program 239 times [2021-06-05 22:37:25,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:25,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928425414] [2021-06-05 22:37:25,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:25,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:25,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928425414] [2021-06-05 22:37:25,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928425414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:25,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170734748] [2021-06-05 22:37:25,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:25,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:37:25,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:25,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:25,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:25,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:25,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:25,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:25,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:25,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:25,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:37:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:26,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170734748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:26,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:26,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:26,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188065741] [2021-06-05 22:37:26,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:26,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:26,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:26,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:26,035 INFO L87 Difference]: Start difference. First operand 3833 states and 16042 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:26,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:26,690 INFO L93 Difference]: Finished difference Result 4121 states and 17133 transitions. [2021-06-05 22:37:26,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:37:26,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:26,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:26,697 INFO L225 Difference]: With dead ends: 4121 [2021-06-05 22:37:26,697 INFO L226 Difference]: Without dead ends: 4100 [2021-06-05 22:37:26,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 614.1ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:37:26,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2021-06-05 22:37:26,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 3829. [2021-06-05 22:37:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3829 states, 3828 states have (on average 4.186520376175548) internal successors, (16026), 3828 states have internal predecessors, (16026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:26,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3829 states to 3829 states and 16026 transitions. [2021-06-05 22:37:26,763 INFO L78 Accepts]: Start accepts. Automaton has 3829 states and 16026 transitions. Word has length 23 [2021-06-05 22:37:26,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:26,763 INFO L482 AbstractCegarLoop]: Abstraction has 3829 states and 16026 transitions. [2021-06-05 22:37:26,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:26,763 INFO L276 IsEmpty]: Start isEmpty. Operand 3829 states and 16026 transitions. [2021-06-05 22:37:26,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:26,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:26,769 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:26,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable861 [2021-06-05 22:37:26,969 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:26,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:26,969 INFO L82 PathProgramCache]: Analyzing trace with hash 959011685, now seen corresponding path program 240 times [2021-06-05 22:37:26,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:26,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47364409] [2021-06-05 22:37:26,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:27,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:27,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47364409] [2021-06-05 22:37:27,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47364409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:27,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581799580] [2021-06-05 22:37:27,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:27,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:37:27,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:27,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:27,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:27,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:27,197 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:37:27,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 22:37:27,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:27,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:27,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:27,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:49 [2021-06-05 22:37:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:27,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581799580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:27,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:27,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:37:27,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599298860] [2021-06-05 22:37:27,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:37:27,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:27,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:37:27,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:37:27,333 INFO L87 Difference]: Start difference. First operand 3829 states and 16026 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:27,932 INFO L93 Difference]: Finished difference Result 4134 states and 17192 transitions. [2021-06-05 22:37:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:37:27,932 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:27,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:27,940 INFO L225 Difference]: With dead ends: 4134 [2021-06-05 22:37:27,940 INFO L226 Difference]: Without dead ends: 4109 [2021-06-05 22:37:27,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:37:27,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4109 states. [2021-06-05 22:37:27,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4109 to 3833. [2021-06-05 22:37:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.1863256784968685) internal successors, (16042), 3832 states have internal predecessors, (16042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:27,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 16042 transitions. [2021-06-05 22:37:27,989 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 16042 transitions. Word has length 23 [2021-06-05 22:37:27,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:27,989 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 16042 transitions. [2021-06-05 22:37:27,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:27,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 16042 transitions. [2021-06-05 22:37:27,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:27,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:27,994 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:28,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable863,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:28,195 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:28,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:28,195 INFO L82 PathProgramCache]: Analyzing trace with hash -53680847, now seen corresponding path program 241 times [2021-06-05 22:37:28,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:28,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234470318] [2021-06-05 22:37:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:28,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:28,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234470318] [2021-06-05 22:37:28,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234470318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:28,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874447195] [2021-06-05 22:37:28,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:28,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:28,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:28,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:28,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:28,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:28,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:28,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:28,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:37:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:28,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874447195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:28,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:28,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:28,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365350915] [2021-06-05 22:37:28,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:28,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:28,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:28,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:28,513 INFO L87 Difference]: Start difference. First operand 3833 states and 16042 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:29,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:29,233 INFO L93 Difference]: Finished difference Result 4144 states and 17224 transitions. [2021-06-05 22:37:29,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:37:29,233 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:29,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:29,240 INFO L225 Difference]: With dead ends: 4144 [2021-06-05 22:37:29,240 INFO L226 Difference]: Without dead ends: 4123 [2021-06-05 22:37:29,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 664.9ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:37:29,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-06-05 22:37:29,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3825. [2021-06-05 22:37:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3824 states have (on average 4.1864539748953975) internal successors, (16009), 3824 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 16009 transitions. [2021-06-05 22:37:29,289 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 16009 transitions. Word has length 23 [2021-06-05 22:37:29,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:29,289 INFO L482 AbstractCegarLoop]: Abstraction has 3825 states and 16009 transitions. [2021-06-05 22:37:29,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:29,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 16009 transitions. [2021-06-05 22:37:29,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:29,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:29,294 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:29,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:29,495 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:29,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:29,495 INFO L82 PathProgramCache]: Analyzing trace with hash -872706097, now seen corresponding path program 242 times [2021-06-05 22:37:29,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:29,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036675392] [2021-06-05 22:37:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:29,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:29,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036675392] [2021-06-05 22:37:29,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036675392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:29,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281866025] [2021-06-05 22:37:29,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:29,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:29,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:29,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:29,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:29,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:29,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:37:29,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:29,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:29,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:29,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:37:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:29,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281866025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:29,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:29,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:29,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395301540] [2021-06-05 22:37:29,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:29,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:29,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:29,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:29,782 INFO L87 Difference]: Start difference. First operand 3825 states and 16009 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:30,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:30,600 INFO L93 Difference]: Finished difference Result 4650 states and 19251 transitions. [2021-06-05 22:37:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:37:30,600 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:30,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:30,608 INFO L225 Difference]: With dead ends: 4650 [2021-06-05 22:37:30,608 INFO L226 Difference]: Without dead ends: 4628 [2021-06-05 22:37:30,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 544.1ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:37:30,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4628 states. [2021-06-05 22:37:30,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4628 to 3831. [2021-06-05 22:37:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 4.186422976501306) internal successors, (16034), 3830 states have internal predecessors, (16034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:30,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 16034 transitions. [2021-06-05 22:37:30,660 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 16034 transitions. Word has length 23 [2021-06-05 22:37:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:30,661 INFO L482 AbstractCegarLoop]: Abstraction has 3831 states and 16034 transitions. [2021-06-05 22:37:30,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 16034 transitions. [2021-06-05 22:37:30,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:30,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:30,666 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:30,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable869 [2021-06-05 22:37:30,866 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:30,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:30,866 INFO L82 PathProgramCache]: Analyzing trace with hash -359179245, now seen corresponding path program 243 times [2021-06-05 22:37:30,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:30,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660593358] [2021-06-05 22:37:30,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:30,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:30,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660593358] [2021-06-05 22:37:30,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660593358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:30,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628242313] [2021-06-05 22:37:30,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:30,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:37:30,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:30,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:37:30,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:31,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:31,098 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:37:31,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:37:31,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:31,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:31,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:31,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 22:37:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:31,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628242313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:31,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:31,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:37:31,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752504018] [2021-06-05 22:37:31,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:37:31,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:31,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:37:31,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:37:31,209 INFO L87 Difference]: Start difference. First operand 3831 states and 16034 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:32,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:32,002 INFO L93 Difference]: Finished difference Result 4429 states and 18354 transitions. [2021-06-05 22:37:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:37:32,002 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:32,010 INFO L225 Difference]: With dead ends: 4429 [2021-06-05 22:37:32,010 INFO L226 Difference]: Without dead ends: 4404 [2021-06-05 22:37:32,010 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 531.0ms TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:37:32,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-06-05 22:37:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 3835. [2021-06-05 22:37:32,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.18622848200313) internal successors, (16050), 3834 states have internal predecessors, (16050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:32,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16050 transitions. [2021-06-05 22:37:32,061 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16050 transitions. Word has length 23 [2021-06-05 22:37:32,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:32,061 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16050 transitions. [2021-06-05 22:37:32,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:32,062 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16050 transitions. [2021-06-05 22:37:32,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:32,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:32,067 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:32,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-06-05 22:37:32,267 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:32,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:32,267 INFO L82 PathProgramCache]: Analyzing trace with hash 716531911, now seen corresponding path program 244 times [2021-06-05 22:37:32,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:32,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334288612] [2021-06-05 22:37:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:32,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:32,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334288612] [2021-06-05 22:37:32,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334288612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:32,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52981036] [2021-06-05 22:37:32,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:32,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:32,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:32,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:32,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:32,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:32,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:32,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:32,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:32,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:32,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:37:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:32,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52981036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:32,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:32,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:32,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337330813] [2021-06-05 22:37:32,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:32,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:32,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:32,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:32,565 INFO L87 Difference]: Start difference. First operand 3835 states and 16050 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:33,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:33,410 INFO L93 Difference]: Finished difference Result 4490 states and 18593 transitions. [2021-06-05 22:37:33,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:37:33,410 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:33,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:33,419 INFO L225 Difference]: With dead ends: 4490 [2021-06-05 22:37:33,419 INFO L226 Difference]: Without dead ends: 4469 [2021-06-05 22:37:33,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 693.5ms TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:37:33,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2021-06-05 22:37:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 3827. [2021-06-05 22:37:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3826 states have (on average 4.186095138525876) internal successors, (16016), 3826 states have internal predecessors, (16016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:33,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 16016 transitions. [2021-06-05 22:37:33,474 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 16016 transitions. Word has length 23 [2021-06-05 22:37:33,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:33,474 INFO L482 AbstractCegarLoop]: Abstraction has 3827 states and 16016 transitions. [2021-06-05 22:37:33,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:33,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 16016 transitions. [2021-06-05 22:37:33,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:33,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:33,479 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:33,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable875 [2021-06-05 22:37:33,680 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:33,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:33,680 INFO L82 PathProgramCache]: Analyzing trace with hash -463198599, now seen corresponding path program 245 times [2021-06-05 22:37:33,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:33,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163668331] [2021-06-05 22:37:33,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:33,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:33,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163668331] [2021-06-05 22:37:33,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163668331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:33,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387397410] [2021-06-05 22:37:33,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:33,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:37:33,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:33,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:33,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:33,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:33,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:37:33,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:33,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:33,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:33,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:37:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:33,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387397410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:33,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:33,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:33,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317668932] [2021-06-05 22:37:33,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:33,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:33,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:33,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:33,985 INFO L87 Difference]: Start difference. First operand 3827 states and 16016 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:34,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:34,731 INFO L93 Difference]: Finished difference Result 4644 states and 19191 transitions. [2021-06-05 22:37:34,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:37:34,731 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:34,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:34,739 INFO L225 Difference]: With dead ends: 4644 [2021-06-05 22:37:34,739 INFO L226 Difference]: Without dead ends: 4613 [2021-06-05 22:37:34,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 553.0ms TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:37:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-06-05 22:37:34,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 3833. [2021-06-05 22:37:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.187630480167015) internal successors, (16047), 3832 states have internal predecessors, (16047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 16047 transitions. [2021-06-05 22:37:34,796 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 16047 transitions. Word has length 23 [2021-06-05 22:37:34,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:34,796 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 16047 transitions. [2021-06-05 22:37:34,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 16047 transitions. [2021-06-05 22:37:34,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:34,802 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:34,802 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:35,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable877 [2021-06-05 22:37:35,013 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:35,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:35,013 INFO L82 PathProgramCache]: Analyzing trace with hash 124546723, now seen corresponding path program 246 times [2021-06-05 22:37:35,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:35,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965794217] [2021-06-05 22:37:35,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:35,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:35,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965794217] [2021-06-05 22:37:35,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965794217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:35,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477442259] [2021-06-05 22:37:35,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:35,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:37:35,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:35,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:37:35,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:35,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:35,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:35,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-06-05 22:37:35,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:35,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:35,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:35,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:36 [2021-06-05 22:37:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:35,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477442259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:35,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:35,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:37:35,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635520746] [2021-06-05 22:37:35,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:37:35,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:35,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:37:35,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:37:35,384 INFO L87 Difference]: Start difference. First operand 3833 states and 16047 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:35,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:35,938 INFO L93 Difference]: Finished difference Result 4233 states and 17591 transitions. [2021-06-05 22:37:35,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:37:35,938 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:35,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:35,945 INFO L225 Difference]: With dead ends: 4233 [2021-06-05 22:37:35,946 INFO L226 Difference]: Without dead ends: 4208 [2021-06-05 22:37:35,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:37:35,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-06-05 22:37:35,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3833. [2021-06-05 22:37:35,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.187630480167015) internal successors, (16047), 3832 states have internal predecessors, (16047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:36,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 16047 transitions. [2021-06-05 22:37:36,025 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 16047 transitions. Word has length 23 [2021-06-05 22:37:36,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:36,025 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 16047 transitions. [2021-06-05 22:37:36,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:36,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 16047 transitions. [2021-06-05 22:37:36,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:36,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:36,030 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:36,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:36,230 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:36,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:36,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1200257879, now seen corresponding path program 247 times [2021-06-05 22:37:36,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:36,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515375799] [2021-06-05 22:37:36,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:36,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:36,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515375799] [2021-06-05 22:37:36,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515375799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:36,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595758399] [2021-06-05 22:37:36,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:36,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:36,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:36,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:36,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:36,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:36,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:36,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:36,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:37:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:36,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595758399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:36,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:36,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:36,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609407149] [2021-06-05 22:37:36,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:36,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:36,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:36,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:36,529 INFO L87 Difference]: Start difference. First operand 3833 states and 16047 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:37,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:37,289 INFO L93 Difference]: Finished difference Result 4388 states and 18200 transitions. [2021-06-05 22:37:37,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:37:37,290 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:37,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:37,298 INFO L225 Difference]: With dead ends: 4388 [2021-06-05 22:37:37,298 INFO L226 Difference]: Without dead ends: 4367 [2021-06-05 22:37:37,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 621.7ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:37:37,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4367 states. [2021-06-05 22:37:37,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4367 to 3829. [2021-06-05 22:37:37,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3829 states, 3828 states have (on average 4.188610240334378) internal successors, (16034), 3828 states have internal predecessors, (16034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:37,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3829 states to 3829 states and 16034 transitions. [2021-06-05 22:37:37,349 INFO L78 Accepts]: Start accepts. Automaton has 3829 states and 16034 transitions. Word has length 23 [2021-06-05 22:37:37,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:37,349 INFO L482 AbstractCegarLoop]: Abstraction has 3829 states and 16034 transitions. [2021-06-05 22:37:37,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:37,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3829 states and 16034 transitions. [2021-06-05 22:37:37,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:37,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:37,354 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:37,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:37,555 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:37,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:37,555 INFO L82 PathProgramCache]: Analyzing trace with hash 936545277, now seen corresponding path program 248 times [2021-06-05 22:37:37,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:37,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855438269] [2021-06-05 22:37:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:37,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:37,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855438269] [2021-06-05 22:37:37,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855438269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:37,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882249911] [2021-06-05 22:37:37,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:37,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:37,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:37,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:37,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:37,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:37,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:37:37,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:37,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:37,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:37,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:37:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:37,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882249911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:37,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:37,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:37,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458823560] [2021-06-05 22:37:37,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:37,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:37,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:37,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:37,860 INFO L87 Difference]: Start difference. First operand 3829 states and 16034 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:38,335 INFO L93 Difference]: Finished difference Result 4121 states and 17136 transitions. [2021-06-05 22:37:38,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:37:38,336 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:38,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:38,343 INFO L225 Difference]: With dead ends: 4121 [2021-06-05 22:37:38,343 INFO L226 Difference]: Without dead ends: 4095 [2021-06-05 22:37:38,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 412.0ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:37:38,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4095 states. [2021-06-05 22:37:38,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4095 to 3843. [2021-06-05 22:37:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3843 states, 3842 states have (on average 4.187662675689745) internal successors, (16089), 3842 states have internal predecessors, (16089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:38,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3843 states to 3843 states and 16089 transitions. [2021-06-05 22:37:38,410 INFO L78 Accepts]: Start accepts. Automaton has 3843 states and 16089 transitions. Word has length 23 [2021-06-05 22:37:38,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:38,410 INFO L482 AbstractCegarLoop]: Abstraction has 3843 states and 16089 transitions. [2021-06-05 22:37:38,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:38,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3843 states and 16089 transitions. [2021-06-05 22:37:38,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:38,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:38,415 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:38,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable882 [2021-06-05 22:37:38,616 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:38,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:38,616 INFO L82 PathProgramCache]: Analyzing trace with hash -105030791, now seen corresponding path program 249 times [2021-06-05 22:37:38,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:38,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57941651] [2021-06-05 22:37:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:38,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:38,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57941651] [2021-06-05 22:37:38,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57941651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:38,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795390595] [2021-06-05 22:37:38,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:38,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:37:38,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:38,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:38,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:38,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:38,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:37:38,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:38,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:38,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:38,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:37:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:38,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795390595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:38,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:38,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:38,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452225751] [2021-06-05 22:37:38,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:38,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:38,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:38,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:38,941 INFO L87 Difference]: Start difference. First operand 3843 states and 16089 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:39,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:39,540 INFO L93 Difference]: Finished difference Result 4177 states and 17349 transitions. [2021-06-05 22:37:39,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:37:39,540 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:39,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:39,547 INFO L225 Difference]: With dead ends: 4177 [2021-06-05 22:37:39,547 INFO L226 Difference]: Without dead ends: 4149 [2021-06-05 22:37:39,547 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 483.1ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:37:39,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2021-06-05 22:37:39,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 3836. [2021-06-05 22:37:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3836 states, 3835 states have (on average 4.188265971316818) internal successors, (16062), 3835 states have internal predecessors, (16062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:39,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3836 states to 3836 states and 16062 transitions. [2021-06-05 22:37:39,598 INFO L78 Accepts]: Start accepts. Automaton has 3836 states and 16062 transitions. Word has length 23 [2021-06-05 22:37:39,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:39,598 INFO L482 AbstractCegarLoop]: Abstraction has 3836 states and 16062 transitions. [2021-06-05 22:37:39,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:39,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3836 states and 16062 transitions. [2021-06-05 22:37:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:39,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:39,603 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:39,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable884 [2021-06-05 22:37:39,804 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:39,804 INFO L82 PathProgramCache]: Analyzing trace with hash -990829071, now seen corresponding path program 250 times [2021-06-05 22:37:39,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:39,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313478399] [2021-06-05 22:37:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:39,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:39,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313478399] [2021-06-05 22:37:39,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313478399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:39,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305872453] [2021-06-05 22:37:39,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:39,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:39,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:39,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:39,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:40,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:40,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:37:40,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:40,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:40,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:40,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:37:40,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:40,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305872453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:40,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:40,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:40,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291883086] [2021-06-05 22:37:40,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:40,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:40,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:40,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:40,096 INFO L87 Difference]: Start difference. First operand 3836 states and 16062 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:40,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:40,732 INFO L93 Difference]: Finished difference Result 4316 states and 17895 transitions. [2021-06-05 22:37:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:37:40,732 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:40,740 INFO L225 Difference]: With dead ends: 4316 [2021-06-05 22:37:40,741 INFO L226 Difference]: Without dead ends: 4282 [2021-06-05 22:37:40,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 449.3ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:37:40,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2021-06-05 22:37:40,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 3833. [2021-06-05 22:37:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.189457202505219) internal successors, (16054), 3832 states have internal predecessors, (16054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:40,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 16054 transitions. [2021-06-05 22:37:40,793 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 16054 transitions. Word has length 23 [2021-06-05 22:37:40,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:40,793 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 16054 transitions. [2021-06-05 22:37:40,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:40,793 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 16054 transitions. [2021-06-05 22:37:40,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:40,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:40,798 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:40,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable886 [2021-06-05 22:37:40,999 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:40,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:40,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1175883353, now seen corresponding path program 251 times [2021-06-05 22:37:40,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:40,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723677572] [2021-06-05 22:37:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:41,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:41,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723677572] [2021-06-05 22:37:41,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723677572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:41,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169986472] [2021-06-05 22:37:41,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:41,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:37:41,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:41,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:41,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:41,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:41,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:41,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:41,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:41,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:41,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:37:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:41,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169986472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:41,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:41,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:41,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978162433] [2021-06-05 22:37:41,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:41,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:41,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:41,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:41,318 INFO L87 Difference]: Start difference. First operand 3833 states and 16054 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:41,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:41,776 INFO L93 Difference]: Finished difference Result 4089 states and 17014 transitions. [2021-06-05 22:37:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:37:41,776 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:41,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:41,783 INFO L225 Difference]: With dead ends: 4089 [2021-06-05 22:37:41,783 INFO L226 Difference]: Without dead ends: 4063 [2021-06-05 22:37:41,783 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 425.2ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:37:41,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4063 states. [2021-06-05 22:37:41,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4063 to 3842. [2021-06-05 22:37:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3842 states, 3841 states have (on average 4.187971882322312) internal successors, (16086), 3841 states have internal predecessors, (16086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3842 states to 3842 states and 16086 transitions. [2021-06-05 22:37:41,833 INFO L78 Accepts]: Start accepts. Automaton has 3842 states and 16086 transitions. Word has length 23 [2021-06-05 22:37:41,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:41,833 INFO L482 AbstractCegarLoop]: Abstraction has 3842 states and 16086 transitions. [2021-06-05 22:37:41,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:41,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3842 states and 16086 transitions. [2021-06-05 22:37:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:41,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:41,838 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:42,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-06-05 22:37:42,038 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:42,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:42,039 INFO L82 PathProgramCache]: Analyzing trace with hash 2077507875, now seen corresponding path program 252 times [2021-06-05 22:37:42,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:42,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240996812] [2021-06-05 22:37:42,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:42,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:42,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240996812] [2021-06-05 22:37:42,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240996812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:42,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470380495] [2021-06-05 22:37:42,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:42,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:37:42,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:42,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:42,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:42,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:42,263 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:37:42,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 22:37:42,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:42,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:42,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:42,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:51 [2021-06-05 22:37:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:42,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470380495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:42,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:42,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:37:42,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110604385] [2021-06-05 22:37:42,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:37:42,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:42,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:37:42,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:37:42,395 INFO L87 Difference]: Start difference. First operand 3842 states and 16086 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:43,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:43,029 INFO L93 Difference]: Finished difference Result 4110 states and 17095 transitions. [2021-06-05 22:37:43,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:37:43,030 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:43,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:43,037 INFO L225 Difference]: With dead ends: 4110 [2021-06-05 22:37:43,037 INFO L226 Difference]: Without dead ends: 4082 [2021-06-05 22:37:43,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 422.8ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:37:43,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-06-05 22:37:43,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3835. [2021-06-05 22:37:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.189358372456964) internal successors, (16062), 3834 states have internal predecessors, (16062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16062 transitions. [2021-06-05 22:37:43,088 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16062 transitions. Word has length 23 [2021-06-05 22:37:43,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:43,088 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16062 transitions. [2021-06-05 22:37:43,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16062 transitions. [2021-06-05 22:37:43,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:43,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:43,093 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:43,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable890 [2021-06-05 22:37:43,294 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:43,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:43,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1790386523, now seen corresponding path program 253 times [2021-06-05 22:37:43,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:43,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497956362] [2021-06-05 22:37:43,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:43,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:43,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497956362] [2021-06-05 22:37:43,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497956362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:43,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365542246] [2021-06-05 22:37:43,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:43,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:43,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:43,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:43,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:43,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:43,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:43,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:43,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:37:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:43,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365542246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:43,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:43,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:43,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067907250] [2021-06-05 22:37:43,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:43,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:43,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:43,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:43,610 INFO L87 Difference]: Start difference. First operand 3835 states and 16062 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:44,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:44,172 INFO L93 Difference]: Finished difference Result 4111 states and 17092 transitions. [2021-06-05 22:37:44,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:37:44,172 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:44,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:44,179 INFO L225 Difference]: With dead ends: 4111 [2021-06-05 22:37:44,179 INFO L226 Difference]: Without dead ends: 4085 [2021-06-05 22:37:44,180 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 474.7ms TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:37:44,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-06-05 22:37:44,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 3839. [2021-06-05 22:37:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3839 states, 3838 states have (on average 4.189161021365295) internal successors, (16078), 3838 states have internal predecessors, (16078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3839 states to 3839 states and 16078 transitions. [2021-06-05 22:37:44,229 INFO L78 Accepts]: Start accepts. Automaton has 3839 states and 16078 transitions. Word has length 23 [2021-06-05 22:37:44,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:44,229 INFO L482 AbstractCegarLoop]: Abstraction has 3839 states and 16078 transitions. [2021-06-05 22:37:44,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:44,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3839 states and 16078 transitions. [2021-06-05 22:37:44,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:44,234 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:44,234 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:44,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable894,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:44,435 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:44,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:44,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1297169137, now seen corresponding path program 254 times [2021-06-05 22:37:44,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:44,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128195868] [2021-06-05 22:37:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:44,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:44,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128195868] [2021-06-05 22:37:44,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128195868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:44,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822664501] [2021-06-05 22:37:44,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:44,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:44,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:44,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:44,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:44,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:44,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:44,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:44,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:44,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:44,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:37:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:44,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822664501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:44,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:44,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:44,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178783413] [2021-06-05 22:37:44,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:44,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:44,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:44,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:44,752 INFO L87 Difference]: Start difference. First operand 3839 states and 16078 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:45,476 INFO L93 Difference]: Finished difference Result 4125 states and 17157 transitions. [2021-06-05 22:37:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:37:45,476 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:45,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:45,483 INFO L225 Difference]: With dead ends: 4125 [2021-06-05 22:37:45,483 INFO L226 Difference]: Without dead ends: 4104 [2021-06-05 22:37:45,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 627.1ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:37:45,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4104 states. [2021-06-05 22:37:45,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4104 to 3835. [2021-06-05 22:37:45,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.189358372456964) internal successors, (16062), 3834 states have internal predecessors, (16062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:45,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16062 transitions. [2021-06-05 22:37:45,533 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16062 transitions. Word has length 23 [2021-06-05 22:37:45,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:45,533 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16062 transitions. [2021-06-05 22:37:45,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:45,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16062 transitions. [2021-06-05 22:37:45,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:45,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:45,538 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:45,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable896 [2021-06-05 22:37:45,738 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:45,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:45,739 INFO L82 PathProgramCache]: Analyzing trace with hash -2063021903, now seen corresponding path program 255 times [2021-06-05 22:37:45,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:45,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796867149] [2021-06-05 22:37:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:45,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:45,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796867149] [2021-06-05 22:37:45,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796867149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:45,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871290953] [2021-06-05 22:37:45,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:45,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:37:45,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:45,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:45,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:45,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:45,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:45,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:45,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:45,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:45,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:37:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:46,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871290953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:46,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:46,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:46,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37909742] [2021-06-05 22:37:46,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:46,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:46,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:46,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:46,059 INFO L87 Difference]: Start difference. First operand 3835 states and 16062 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:46,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:46,679 INFO L93 Difference]: Finished difference Result 4138 states and 17212 transitions. [2021-06-05 22:37:46,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:37:46,680 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:46,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:46,687 INFO L225 Difference]: With dead ends: 4138 [2021-06-05 22:37:46,687 INFO L226 Difference]: Without dead ends: 4113 [2021-06-05 22:37:46,687 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 573.8ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:37:46,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4113 states. [2021-06-05 22:37:46,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4113 to 3835. [2021-06-05 22:37:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.189358372456964) internal successors, (16062), 3834 states have internal predecessors, (16062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:46,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16062 transitions. [2021-06-05 22:37:46,740 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16062 transitions. Word has length 23 [2021-06-05 22:37:46,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:46,741 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16062 transitions. [2021-06-05 22:37:46,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:46,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16062 transitions. [2021-06-05 22:37:46,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:46,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:46,746 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:46,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable898 [2021-06-05 22:37:46,946 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:46,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:46,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1219252861, now seen corresponding path program 256 times [2021-06-05 22:37:46,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:46,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084184629] [2021-06-05 22:37:46,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:47,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:47,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084184629] [2021-06-05 22:37:47,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084184629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:47,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237480998] [2021-06-05 22:37:47,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:47,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:47,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:47,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:47,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:47,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:47,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:47,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:47,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:47,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:47,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:37:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:47,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237480998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:47,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:47,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:47,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724226751] [2021-06-05 22:37:47,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:47,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:47,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:47,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:47,266 INFO L87 Difference]: Start difference. First operand 3835 states and 16062 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:47,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:47,963 INFO L93 Difference]: Finished difference Result 4140 states and 17217 transitions. [2021-06-05 22:37:47,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:37:47,963 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:47,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:47,970 INFO L225 Difference]: With dead ends: 4140 [2021-06-05 22:37:47,970 INFO L226 Difference]: Without dead ends: 4119 [2021-06-05 22:37:47,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 663.8ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:37:47,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2021-06-05 22:37:48,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 3833. [2021-06-05 22:37:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.189457202505219) internal successors, (16054), 3832 states have internal predecessors, (16054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:48,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 16054 transitions. [2021-06-05 22:37:48,020 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 16054 transitions. Word has length 23 [2021-06-05 22:37:48,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:48,021 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 16054 transitions. [2021-06-05 22:37:48,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:48,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 16054 transitions. [2021-06-05 22:37:48,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:48,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:48,026 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:48,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:48,227 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:48,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:48,227 INFO L82 PathProgramCache]: Analyzing trace with hash -498233309, now seen corresponding path program 257 times [2021-06-05 22:37:48,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:48,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721050040] [2021-06-05 22:37:48,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:48,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:48,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721050040] [2021-06-05 22:37:48,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721050040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:48,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772730670] [2021-06-05 22:37:48,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:48,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:37:48,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:48,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:37:48,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:48,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:48,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2021-06-05 22:37:48,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:48,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:48,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:37:48,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:10 [2021-06-05 22:37:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:48,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772730670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:48,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:48,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:37:48,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475781474] [2021-06-05 22:37:48,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:37:48,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:48,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:37:48,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:37:48,506 INFO L87 Difference]: Start difference. First operand 3833 states and 16054 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:49,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:49,109 INFO L93 Difference]: Finished difference Result 4292 states and 17808 transitions. [2021-06-05 22:37:49,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:37:49,109 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:49,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:49,117 INFO L225 Difference]: With dead ends: 4292 [2021-06-05 22:37:49,117 INFO L226 Difference]: Without dead ends: 4261 [2021-06-05 22:37:49,117 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 359.0ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:37:49,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-06-05 22:37:49,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 3835. [2021-06-05 22:37:49,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.188836724047992) internal successors, (16060), 3834 states have internal predecessors, (16060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16060 transitions. [2021-06-05 22:37:49,166 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16060 transitions. Word has length 23 [2021-06-05 22:37:49,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:49,166 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16060 transitions. [2021-06-05 22:37:49,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16060 transitions. [2021-06-05 22:37:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:49,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:49,171 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:49,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable902 [2021-06-05 22:37:49,372 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:49,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:49,372 INFO L82 PathProgramCache]: Analyzing trace with hash 542002489, now seen corresponding path program 258 times [2021-06-05 22:37:49,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:49,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083905724] [2021-06-05 22:37:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:49,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:49,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083905724] [2021-06-05 22:37:49,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083905724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:49,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013695201] [2021-06-05 22:37:49,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:49,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:37:49,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:49,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:49,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:49,603 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:37:49,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 22:37:49,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:49,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:49,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:49,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:38 [2021-06-05 22:37:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:49,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013695201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:49,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:49,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:37:49,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968435459] [2021-06-05 22:37:49,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:37:49,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:49,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:37:49,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:37:49,706 INFO L87 Difference]: Start difference. First operand 3835 states and 16060 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:50,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:50,378 INFO L93 Difference]: Finished difference Result 4178 states and 17378 transitions. [2021-06-05 22:37:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:37:50,378 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:50,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:50,385 INFO L225 Difference]: With dead ends: 4178 [2021-06-05 22:37:50,385 INFO L226 Difference]: Without dead ends: 4153 [2021-06-05 22:37:50,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 437.6ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:37:50,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2021-06-05 22:37:50,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 3835. [2021-06-05 22:37:50,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.188836724047992) internal successors, (16060), 3834 states have internal predecessors, (16060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:50,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16060 transitions. [2021-06-05 22:37:50,437 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16060 transitions. Word has length 23 [2021-06-05 22:37:50,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:50,437 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16060 transitions. [2021-06-05 22:37:50,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:50,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16060 transitions. [2021-06-05 22:37:50,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:50,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:50,442 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:50,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable905,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:50,643 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:50,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:50,643 INFO L82 PathProgramCache]: Analyzing trace with hash -470690043, now seen corresponding path program 259 times [2021-06-05 22:37:50,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:50,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156117643] [2021-06-05 22:37:50,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:50,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:50,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156117643] [2021-06-05 22:37:50,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156117643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:50,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706467555] [2021-06-05 22:37:50,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:50,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:50,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:50,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:50,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:37:50,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:50,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:50,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:50,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:37:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:50,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706467555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:50,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:50,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:50,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88439760] [2021-06-05 22:37:50,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:50,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:50,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:50,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:50,943 INFO L87 Difference]: Start difference. First operand 3835 states and 16060 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:51,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:51,734 INFO L93 Difference]: Finished difference Result 4279 states and 17769 transitions. [2021-06-05 22:37:51,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:37:51,734 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:51,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:51,741 INFO L225 Difference]: With dead ends: 4279 [2021-06-05 22:37:51,741 INFO L226 Difference]: Without dead ends: 4258 [2021-06-05 22:37:51,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 675.5ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:37:51,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2021-06-05 22:37:51,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 3831. [2021-06-05 22:37:51,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 4.188511749347258) internal successors, (16042), 3830 states have internal predecessors, (16042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:51,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 16042 transitions. [2021-06-05 22:37:51,791 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 16042 transitions. Word has length 23 [2021-06-05 22:37:51,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:51,791 INFO L482 AbstractCegarLoop]: Abstraction has 3831 states and 16042 transitions. [2021-06-05 22:37:51,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:51,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 16042 transitions. [2021-06-05 22:37:51,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:51,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:51,797 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:51,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable909 [2021-06-05 22:37:51,997 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:51,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:51,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1217838641, now seen corresponding path program 260 times [2021-06-05 22:37:51,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:51,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384974343] [2021-06-05 22:37:51,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:52,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:52,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384974343] [2021-06-05 22:37:52,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384974343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:52,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843824540] [2021-06-05 22:37:52,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:52,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:52,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:52,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:37:52,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:52,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:52,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:37:52,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:52,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2021-06-05 22:37:52,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:52,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:52,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:52,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:26 [2021-06-05 22:37:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:52,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843824540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:52,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:52,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:37:52,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64926655] [2021-06-05 22:37:52,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:37:52,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:52,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:37:52,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:37:52,316 INFO L87 Difference]: Start difference. First operand 3831 states and 16042 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:52,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:52,979 INFO L93 Difference]: Finished difference Result 4353 states and 18026 transitions. [2021-06-05 22:37:52,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:37:52,980 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:52,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:52,987 INFO L225 Difference]: With dead ends: 4353 [2021-06-05 22:37:52,988 INFO L226 Difference]: Without dead ends: 4344 [2021-06-05 22:37:52,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 485.7ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:37:52,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2021-06-05 22:37:53,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 3852. [2021-06-05 22:37:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3852 states, 3851 states have (on average 4.192936899506622) internal successors, (16147), 3851 states have internal predecessors, (16147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3852 states to 3852 states and 16147 transitions. [2021-06-05 22:37:53,039 INFO L78 Accepts]: Start accepts. Automaton has 3852 states and 16147 transitions. Word has length 23 [2021-06-05 22:37:53,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:53,039 INFO L482 AbstractCegarLoop]: Abstraction has 3852 states and 16147 transitions. [2021-06-05 22:37:53,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:53,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3852 states and 16147 transitions. [2021-06-05 22:37:53,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:53,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:53,044 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:53,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:53,245 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:53,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1331844619, now seen corresponding path program 261 times [2021-06-05 22:37:53,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:53,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211059032] [2021-06-05 22:37:53,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:53,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:53,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211059032] [2021-06-05 22:37:53,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211059032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:53,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129951929] [2021-06-05 22:37:53,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:53,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:37:53,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:53,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:37:53,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:53,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:37:53,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:53,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:53,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:53,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:15 [2021-06-05 22:37:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:53,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129951929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:53,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:53,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:37:53,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631953162] [2021-06-05 22:37:53,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:37:53,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:53,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:37:53,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:37:53,535 INFO L87 Difference]: Start difference. First operand 3852 states and 16147 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:54,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:54,422 INFO L93 Difference]: Finished difference Result 4503 states and 18585 transitions. [2021-06-05 22:37:54,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:37:54,423 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:54,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:54,431 INFO L225 Difference]: With dead ends: 4503 [2021-06-05 22:37:54,431 INFO L226 Difference]: Without dead ends: 4484 [2021-06-05 22:37:54,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 620.3ms TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:37:54,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2021-06-05 22:37:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 3918. [2021-06-05 22:37:54,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.198621393923921) internal successors, (16446), 3917 states have internal predecessors, (16446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:54,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16446 transitions. [2021-06-05 22:37:54,514 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16446 transitions. Word has length 23 [2021-06-05 22:37:54,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:54,515 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16446 transitions. [2021-06-05 22:37:54,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:54,515 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16446 transitions. [2021-06-05 22:37:54,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:54,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:54,521 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:54,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable912,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:54,722 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:54,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:54,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1921546609, now seen corresponding path program 262 times [2021-06-05 22:37:54,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:54,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683314488] [2021-06-05 22:37:54,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:54,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:54,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683314488] [2021-06-05 22:37:54,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683314488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:54,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261071370] [2021-06-05 22:37:54,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:54,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:54,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:54,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:54,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:54,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:54,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:37:54,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:54,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:54,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:54,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:37:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:55,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261071370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:55,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:55,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:37:55,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848401103] [2021-06-05 22:37:55,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:37:55,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:55,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:37:55,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:37:55,047 INFO L87 Difference]: Start difference. First operand 3918 states and 16446 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:55,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:55,831 INFO L93 Difference]: Finished difference Result 4278 states and 17787 transitions. [2021-06-05 22:37:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:37:55,832 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:55,839 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 22:37:55,839 INFO L226 Difference]: Without dead ends: 4269 [2021-06-05 22:37:55,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 592.2ms TimeCoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:37:55,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4269 states. [2021-06-05 22:37:55,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4269 to 3915. [2021-06-05 22:37:55,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3915 states, 3914 states have (on average 4.199029126213592) internal successors, (16435), 3914 states have internal predecessors, (16435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:55,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3915 states to 3915 states and 16435 transitions. [2021-06-05 22:37:55,890 INFO L78 Accepts]: Start accepts. Automaton has 3915 states and 16435 transitions. Word has length 23 [2021-06-05 22:37:55,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:55,890 INFO L482 AbstractCegarLoop]: Abstraction has 3915 states and 16435 transitions. [2021-06-05 22:37:55,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:55,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3915 states and 16435 transitions. [2021-06-05 22:37:55,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:55,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:55,896 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:56,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable913,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:56,096 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:56,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:56,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1695665499, now seen corresponding path program 263 times [2021-06-05 22:37:56,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:56,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235504380] [2021-06-05 22:37:56,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:56,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:56,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235504380] [2021-06-05 22:37:56,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235504380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:56,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441882818] [2021-06-05 22:37:56,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:56,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:37:56,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:56,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:56,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:56,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:56,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:37:56,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:56,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:56,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:56,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:37:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:56,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441882818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:56,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:56,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:56,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255557916] [2021-06-05 22:37:56,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:56,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:56,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:56,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:56,424 INFO L87 Difference]: Start difference. First operand 3915 states and 16435 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:57,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:57,083 INFO L93 Difference]: Finished difference Result 4117 states and 17178 transitions. [2021-06-05 22:37:57,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:37:57,084 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:57,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:57,091 INFO L225 Difference]: With dead ends: 4117 [2021-06-05 22:37:57,091 INFO L226 Difference]: Without dead ends: 4108 [2021-06-05 22:37:57,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 546.8ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:37:57,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4108 states. [2021-06-05 22:37:57,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4108 to 3922. [2021-06-05 22:37:57,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.199183881662841) internal successors, (16465), 3921 states have internal predecessors, (16465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16465 transitions. [2021-06-05 22:37:57,139 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16465 transitions. Word has length 23 [2021-06-05 22:37:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:57,140 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16465 transitions. [2021-06-05 22:37:57,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:57,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16465 transitions. [2021-06-05 22:37:57,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:57,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:57,145 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:57,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable915,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:57,345 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:57,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:57,345 INFO L82 PathProgramCache]: Analyzing trace with hash 654089431, now seen corresponding path program 264 times [2021-06-05 22:37:57,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:57,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019919412] [2021-06-05 22:37:57,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:57,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:57,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019919412] [2021-06-05 22:37:57,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019919412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:57,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894424351] [2021-06-05 22:37:57,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:57,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:37:57,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:57,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:57,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:57,635 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:37:57,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 22:37:57,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:37:57,661 INFO L628 ElimStorePlain]: treesize reduction 70, result has 19.5 percent of original size [2021-06-05 22:37:57,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:57,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:17 [2021-06-05 22:37:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:57,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894424351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:57,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:57,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:37:57,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425132185] [2021-06-05 22:37:57,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:37:57,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:57,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:37:57,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:37:57,724 INFO L87 Difference]: Start difference. First operand 3922 states and 16465 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:58,407 INFO L93 Difference]: Finished difference Result 4150 states and 17299 transitions. [2021-06-05 22:37:58,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:37:58,408 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:58,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:58,416 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 22:37:58,416 INFO L226 Difference]: Without dead ends: 4141 [2021-06-05 22:37:58,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 460.2ms TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:37:58,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2021-06-05 22:37:58,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3922. [2021-06-05 22:37:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.199183881662841) internal successors, (16465), 3921 states have internal predecessors, (16465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:58,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16465 transitions. [2021-06-05 22:37:58,467 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16465 transitions. Word has length 23 [2021-06-05 22:37:58,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:58,467 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16465 transitions. [2021-06-05 22:37:58,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16465 transitions. [2021-06-05 22:37:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:58,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:58,473 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:58,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable917 [2021-06-05 22:37:58,673 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:58,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:58,673 INFO L82 PathProgramCache]: Analyzing trace with hash -231708849, now seen corresponding path program 265 times [2021-06-05 22:37:58,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:58,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137822276] [2021-06-05 22:37:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:58,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:58,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137822276] [2021-06-05 22:37:58,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137822276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:58,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322646971] [2021-06-05 22:37:58,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:58,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:37:58,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:58,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:58,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:37:58,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:58,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:58,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:58,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:37:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:58,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322646971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:58,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:58,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:37:58,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164494931] [2021-06-05 22:37:58,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:37:58,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:58,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:37:58,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:37:58,987 INFO L87 Difference]: Start difference. First operand 3922 states and 16465 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:59,653 INFO L93 Difference]: Finished difference Result 4298 states and 17873 transitions. [2021-06-05 22:37:59,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:37:59,653 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:37:59,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:59,661 INFO L225 Difference]: With dead ends: 4298 [2021-06-05 22:37:59,661 INFO L226 Difference]: Without dead ends: 4289 [2021-06-05 22:37:59,661 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 503.9ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:37:59,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2021-06-05 22:37:59,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 3917. [2021-06-05 22:37:59,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3917 states, 3916 states have (on average 4.1981613891726255) internal successors, (16440), 3916 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3917 states to 3917 states and 16440 transitions. [2021-06-05 22:37:59,715 INFO L78 Accepts]: Start accepts. Automaton has 3917 states and 16440 transitions. Word has length 23 [2021-06-05 22:37:59,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:59,715 INFO L482 AbstractCegarLoop]: Abstraction has 3917 states and 16440 transitions. [2021-06-05 22:37:59,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:59,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3917 states and 16440 transitions. [2021-06-05 22:37:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:37:59,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:59,721 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:59,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-06-05 22:37:59,921 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:59,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:59,921 INFO L82 PathProgramCache]: Analyzing trace with hash 157060551, now seen corresponding path program 266 times [2021-06-05 22:37:59,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:59,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365921860] [2021-06-05 22:37:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:00,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:00,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365921860] [2021-06-05 22:38:00,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365921860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:00,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275199710] [2021-06-05 22:38:00,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:00,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:00,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:00,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:38:00,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:00,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:00,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 22:38:00,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:00,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:00,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:00,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:24 [2021-06-05 22:38:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:00,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275199710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:00,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:00,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:38:00,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239949237] [2021-06-05 22:38:00,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:00,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:00,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:00,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:00,216 INFO L87 Difference]: Start difference. First operand 3917 states and 16440 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:00,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:00,954 INFO L93 Difference]: Finished difference Result 4484 states and 18607 transitions. [2021-06-05 22:38:00,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:38:00,955 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:00,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:00,963 INFO L225 Difference]: With dead ends: 4484 [2021-06-05 22:38:00,963 INFO L226 Difference]: Without dead ends: 4475 [2021-06-05 22:38:00,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 519.7ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:38:00,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4475 states. [2021-06-05 22:38:01,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4475 to 3917. [2021-06-05 22:38:01,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3917 states, 3916 states have (on average 4.1981613891726255) internal successors, (16440), 3916 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:01,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3917 states to 3917 states and 16440 transitions. [2021-06-05 22:38:01,015 INFO L78 Accepts]: Start accepts. Automaton has 3917 states and 16440 transitions. Word has length 23 [2021-06-05 22:38:01,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:01,015 INFO L482 AbstractCegarLoop]: Abstraction has 3917 states and 16440 transitions. [2021-06-05 22:38:01,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:01,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3917 states and 16440 transitions. [2021-06-05 22:38:01,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:01,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:01,021 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:01,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable923 [2021-06-05 22:38:01,221 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:01,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:01,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1902344587, now seen corresponding path program 267 times [2021-06-05 22:38:01,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:01,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024718410] [2021-06-05 22:38:01,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:01,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:01,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024718410] [2021-06-05 22:38:01,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024718410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:01,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855471141] [2021-06-05 22:38:01,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:01,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:38:01,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:01,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:01,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:01,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:01,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:38:01,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:01,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:01,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:01,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:38:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:01,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855471141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:01,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:01,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:38:01,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141830932] [2021-06-05 22:38:01,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:01,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:01,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:01,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:01,550 INFO L87 Difference]: Start difference. First operand 3917 states and 16440 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:02,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:02,835 INFO L93 Difference]: Finished difference Result 4535 states and 18823 transitions. [2021-06-05 22:38:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:38:02,835 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:02,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:02,844 INFO L225 Difference]: With dead ends: 4535 [2021-06-05 22:38:02,844 INFO L226 Difference]: Without dead ends: 4526 [2021-06-05 22:38:02,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 883.0ms TimeCoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:38:02,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4526 states. [2021-06-05 22:38:02,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4526 to 3921. [2021-06-05 22:38:02,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3921 states, 3920 states have (on average 4.198724489795918) internal successors, (16459), 3920 states have internal predecessors, (16459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3921 states to 3921 states and 16459 transitions. [2021-06-05 22:38:02,898 INFO L78 Accepts]: Start accepts. Automaton has 3921 states and 16459 transitions. Word has length 23 [2021-06-05 22:38:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:02,898 INFO L482 AbstractCegarLoop]: Abstraction has 3921 states and 16459 transitions. [2021-06-05 22:38:02,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:02,898 INFO L276 IsEmpty]: Start isEmpty. Operand 3921 states and 16459 transitions. [2021-06-05 22:38:02,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:02,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:02,903 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:03,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable924,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:03,103 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:03,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:03,104 INFO L82 PathProgramCache]: Analyzing trace with hash 860768519, now seen corresponding path program 268 times [2021-06-05 22:38:03,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:03,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873188250] [2021-06-05 22:38:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:03,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:03,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873188250] [2021-06-05 22:38:03,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873188250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:03,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151258245] [2021-06-05 22:38:03,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:03,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:03,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:03,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:03,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:03,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:03,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:38:03,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:03,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:03,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:03,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:38:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:03,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151258245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:03,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:03,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:38:03,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11822075] [2021-06-05 22:38:03,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:03,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:03,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:03,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:03,432 INFO L87 Difference]: Start difference. First operand 3921 states and 16459 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:04,953 INFO L93 Difference]: Finished difference Result 4683 states and 19421 transitions. [2021-06-05 22:38:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:38:04,953 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:04,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:04,962 INFO L225 Difference]: With dead ends: 4683 [2021-06-05 22:38:04,962 INFO L226 Difference]: Without dead ends: 4674 [2021-06-05 22:38:04,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1029.4ms TimeCoverageRelationStatistics Valid=267, Invalid=1989, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:38:04,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4674 states. [2021-06-05 22:38:05,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4674 to 3913. [2021-06-05 22:38:05,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 4.199130879345604) internal successors, (16427), 3912 states have internal predecessors, (16427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 16427 transitions. [2021-06-05 22:38:05,019 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 16427 transitions. Word has length 23 [2021-06-05 22:38:05,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:05,019 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 16427 transitions. [2021-06-05 22:38:05,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:05,019 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 16427 transitions. [2021-06-05 22:38:05,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:05,024 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:05,024 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:05,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable926,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:05,225 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:05,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:05,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1917113491, now seen corresponding path program 269 times [2021-06-05 22:38:05,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:05,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328587021] [2021-06-05 22:38:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:05,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:05,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328587021] [2021-06-05 22:38:05,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328587021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:05,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020284510] [2021-06-05 22:38:05,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:05,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:38:05,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:05,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:05,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:05,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:05,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:38:05,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:05,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:05,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:05,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:38:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:05,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020284510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:05,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:05,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:38:05,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780625539] [2021-06-05 22:38:05,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:05,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:05,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:05,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:05,532 INFO L87 Difference]: Start difference. First operand 3913 states and 16427 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:06,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:06,441 INFO L93 Difference]: Finished difference Result 5268 states and 21685 transitions. [2021-06-05 22:38:06,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:38:06,442 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:06,451 INFO L225 Difference]: With dead ends: 5268 [2021-06-05 22:38:06,451 INFO L226 Difference]: Without dead ends: 5229 [2021-06-05 22:38:06,451 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 575.9ms TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:38:06,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5229 states. [2021-06-05 22:38:06,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5229 to 3916. [2021-06-05 22:38:06,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196679438058748) internal successors, (16430), 3915 states have internal predecessors, (16430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:06,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16430 transitions. [2021-06-05 22:38:06,528 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16430 transitions. Word has length 23 [2021-06-05 22:38:06,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:06,529 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16430 transitions. [2021-06-05 22:38:06,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:06,529 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16430 transitions. [2021-06-05 22:38:06,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:06,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:06,534 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:06,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable928,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:06,734 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:06,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:06,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1112714267, now seen corresponding path program 270 times [2021-06-05 22:38:06,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:06,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384483440] [2021-06-05 22:38:06,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:06,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:06,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384483440] [2021-06-05 22:38:06,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384483440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:06,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139074246] [2021-06-05 22:38:06,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:06,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:38:06,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:06,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:38:06,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:06,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:06,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:38:06,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:06,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:06,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:06,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 22:38:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:07,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139074246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:07,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:07,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:38:07,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827861470] [2021-06-05 22:38:07,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:07,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:07,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:07,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:07,026 INFO L87 Difference]: Start difference. First operand 3916 states and 16430 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:08,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:08,300 INFO L93 Difference]: Finished difference Result 4810 states and 19848 transitions. [2021-06-05 22:38:08,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:38:08,300 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:08,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:08,308 INFO L225 Difference]: With dead ends: 4810 [2021-06-05 22:38:08,308 INFO L226 Difference]: Without dead ends: 4792 [2021-06-05 22:38:08,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1003.8ms TimeCoverageRelationStatistics Valid=298, Invalid=1682, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:38:08,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4792 states. [2021-06-05 22:38:08,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4792 to 3918. [2021-06-05 22:38:08,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.196068419708961) internal successors, (16436), 3917 states have internal predecessors, (16436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:08,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16436 transitions. [2021-06-05 22:38:08,363 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16436 transitions. Word has length 23 [2021-06-05 22:38:08,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:08,363 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16436 transitions. [2021-06-05 22:38:08,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:08,363 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16436 transitions. [2021-06-05 22:38:08,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:08,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:08,368 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:08,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable930 [2021-06-05 22:38:08,568 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:08,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:08,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1568686295, now seen corresponding path program 271 times [2021-06-05 22:38:08,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:08,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979647670] [2021-06-05 22:38:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:08,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:08,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979647670] [2021-06-05 22:38:08,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979647670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:08,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043543649] [2021-06-05 22:38:08,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:08,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:08,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:08,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:08,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:38:08,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:08,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:08,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:08,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:38:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:08,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043543649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:08,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:08,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:38:08,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787895890] [2021-06-05 22:38:08,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:08,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:08,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:08,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:08,908 INFO L87 Difference]: Start difference. First operand 3918 states and 16436 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:10,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:10,050 INFO L93 Difference]: Finished difference Result 4974 states and 20505 transitions. [2021-06-05 22:38:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:38:10,050 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:10,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:10,059 INFO L225 Difference]: With dead ends: 4974 [2021-06-05 22:38:10,059 INFO L226 Difference]: Without dead ends: 4942 [2021-06-05 22:38:10,059 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 852.8ms TimeCoverageRelationStatistics Valid=217, Invalid=1343, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:38:10,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4942 states. [2021-06-05 22:38:10,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4942 to 3916. [2021-06-05 22:38:10,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196679438058748) internal successors, (16430), 3915 states have internal predecessors, (16430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16430 transitions. [2021-06-05 22:38:10,115 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16430 transitions. Word has length 23 [2021-06-05 22:38:10,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:10,115 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16430 transitions. [2021-06-05 22:38:10,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:10,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16430 transitions. [2021-06-05 22:38:10,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:10,121 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:10,121 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:10,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable931,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:10,321 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:10,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1477541221, now seen corresponding path program 272 times [2021-06-05 22:38:10,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:10,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908215106] [2021-06-05 22:38:10,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:10,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:10,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908215106] [2021-06-05 22:38:10,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908215106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:10,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824370778] [2021-06-05 22:38:10,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:10,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:10,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:10,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:38:10,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:10,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:10,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:10,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:10,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 22:38:10,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:10,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:10,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:10,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 22:38:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:10,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824370778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:10,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:10,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:38:10,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3795167] [2021-06-05 22:38:10,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:10,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:10,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:10,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:10,636 INFO L87 Difference]: Start difference. First operand 3916 states and 16430 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:12,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:12,024 INFO L93 Difference]: Finished difference Result 4356 states and 18122 transitions. [2021-06-05 22:38:12,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:38:12,024 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:12,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:12,032 INFO L225 Difference]: With dead ends: 4356 [2021-06-05 22:38:12,032 INFO L226 Difference]: Without dead ends: 4347 [2021-06-05 22:38:12,032 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 969.6ms TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:38:12,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2021-06-05 22:38:12,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 3922. [2021-06-05 22:38:12,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.197143585819944) internal successors, (16457), 3921 states have internal predecessors, (16457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:12,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16457 transitions. [2021-06-05 22:38:12,086 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16457 transitions. Word has length 23 [2021-06-05 22:38:12,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:12,086 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16457 transitions. [2021-06-05 22:38:12,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:12,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16457 transitions. [2021-06-05 22:38:12,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:12,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:12,091 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:12,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:12,291 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:12,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:12,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1775850007, now seen corresponding path program 273 times [2021-06-05 22:38:12,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:12,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034873000] [2021-06-05 22:38:12,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:12,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:12,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034873000] [2021-06-05 22:38:12,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034873000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:12,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702238429] [2021-06-05 22:38:12,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:12,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:38:12,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:12,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:12,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:12,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:12,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 22:38:12,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:12,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:12,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:12,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:41 [2021-06-05 22:38:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:12,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702238429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:12,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:12,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:38:12,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549238577] [2021-06-05 22:38:12,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:12,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:12,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:12,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:12,627 INFO L87 Difference]: Start difference. First operand 3922 states and 16457 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:14,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:14,242 INFO L93 Difference]: Finished difference Result 4453 states and 18505 transitions. [2021-06-05 22:38:14,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:38:14,242 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:14,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:14,250 INFO L225 Difference]: With dead ends: 4453 [2021-06-05 22:38:14,250 INFO L226 Difference]: Without dead ends: 4444 [2021-06-05 22:38:14,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1164.0ms TimeCoverageRelationStatistics Valid=296, Invalid=1960, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:38:14,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4444 states. [2021-06-05 22:38:14,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4444 to 3918. [2021-06-05 22:38:14,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.196579014551953) internal successors, (16438), 3917 states have internal predecessors, (16438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16438 transitions. [2021-06-05 22:38:14,303 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16438 transitions. Word has length 23 [2021-06-05 22:38:14,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:14,303 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16438 transitions. [2021-06-05 22:38:14,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16438 transitions. [2021-06-05 22:38:14,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:14,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:14,308 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:14,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable934,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:14,508 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:14,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:14,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1488728655, now seen corresponding path program 274 times [2021-06-05 22:38:14,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:14,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988400324] [2021-06-05 22:38:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:14,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:14,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988400324] [2021-06-05 22:38:14,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988400324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:14,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380259776] [2021-06-05 22:38:14,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:14,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:14,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:14,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:14,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:14,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:14,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:38:14,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:14,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:14,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:14,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:38:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:14,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380259776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:14,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:14,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:38:14,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161731670] [2021-06-05 22:38:14,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:14,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:14,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:14,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:14,841 INFO L87 Difference]: Start difference. First operand 3918 states and 16438 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:16,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:16,209 INFO L93 Difference]: Finished difference Result 4378 states and 18204 transitions. [2021-06-05 22:38:16,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:38:16,210 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:16,217 INFO L225 Difference]: With dead ends: 4378 [2021-06-05 22:38:16,217 INFO L226 Difference]: Without dead ends: 4369 [2021-06-05 22:38:16,217 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1076.8ms TimeCoverageRelationStatistics Valid=246, Invalid=1646, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:38:16,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4369 states. [2021-06-05 22:38:16,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4369 to 3922. [2021-06-05 22:38:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.196378474878857) internal successors, (16454), 3921 states have internal predecessors, (16454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16454 transitions. [2021-06-05 22:38:16,270 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16454 transitions. Word has length 23 [2021-06-05 22:38:16,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:16,271 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16454 transitions. [2021-06-05 22:38:16,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:16,271 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16454 transitions. [2021-06-05 22:38:16,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:16,276 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:16,276 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:16,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable936 [2021-06-05 22:38:16,476 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:16,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:16,477 INFO L82 PathProgramCache]: Analyzing trace with hash 995511269, now seen corresponding path program 275 times [2021-06-05 22:38:16,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:16,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048567647] [2021-06-05 22:38:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:16,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:16,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048567647] [2021-06-05 22:38:16,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048567647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:16,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956892940] [2021-06-05 22:38:16,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:16,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:38:16,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:16,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:16,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:16,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:16,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:38:16,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:16,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:16,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:16,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:38:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:16,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956892940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:16,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:16,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:38:16,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692830964] [2021-06-05 22:38:16,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:16,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:16,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:16,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:16,808 INFO L87 Difference]: Start difference. First operand 3922 states and 16454 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:18,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:18,151 INFO L93 Difference]: Finished difference Result 4367 states and 18169 transitions. [2021-06-05 22:38:18,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:38:18,151 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:18,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:18,159 INFO L225 Difference]: With dead ends: 4367 [2021-06-05 22:38:18,159 INFO L226 Difference]: Without dead ends: 4356 [2021-06-05 22:38:18,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1025.3ms TimeCoverageRelationStatistics Valid=230, Invalid=1492, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:38:18,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2021-06-05 22:38:18,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 3922. [2021-06-05 22:38:18,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.196378474878857) internal successors, (16454), 3921 states have internal predecessors, (16454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16454 transitions. [2021-06-05 22:38:18,210 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16454 transitions. Word has length 23 [2021-06-05 22:38:18,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:18,210 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16454 transitions. [2021-06-05 22:38:18,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16454 transitions. [2021-06-05 22:38:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:18,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:18,215 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:18,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable938,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:18,416 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:18,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:18,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1930287525, now seen corresponding path program 276 times [2021-06-05 22:38:18,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:18,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393026644] [2021-06-05 22:38:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:18,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:18,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393026644] [2021-06-05 22:38:18,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393026644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:18,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253087429] [2021-06-05 22:38:18,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:18,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:38:18,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:18,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:18,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:18,654 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:38:18,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 22:38:18,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:18,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:18,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:18,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:41 [2021-06-05 22:38:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:18,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253087429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:18,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:18,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:38:18,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987908364] [2021-06-05 22:38:18,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:18,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:18,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:18,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:18,802 INFO L87 Difference]: Start difference. First operand 3922 states and 16454 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:19,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:19,784 INFO L93 Difference]: Finished difference Result 4454 states and 18497 transitions. [2021-06-05 22:38:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:38:19,785 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:19,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:19,792 INFO L225 Difference]: With dead ends: 4454 [2021-06-05 22:38:19,792 INFO L226 Difference]: Without dead ends: 4420 [2021-06-05 22:38:19,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 732.1ms TimeCoverageRelationStatistics Valid=193, Invalid=1289, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:38:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4420 states. [2021-06-05 22:38:19,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4420 to 3928. [2021-06-05 22:38:19,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 4.196078431372549) internal successors, (16478), 3927 states have internal predecessors, (16478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:19,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 16478 transitions. [2021-06-05 22:38:19,845 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 16478 transitions. Word has length 23 [2021-06-05 22:38:19,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:19,845 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 16478 transitions. [2021-06-05 22:38:19,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:19,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 16478 transitions. [2021-06-05 22:38:19,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:19,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:19,850 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:20,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-06-05 22:38:20,051 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:20,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:20,051 INFO L82 PathProgramCache]: Analyzing trace with hash 917594993, now seen corresponding path program 277 times [2021-06-05 22:38:20,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:20,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180870215] [2021-06-05 22:38:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:20,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:20,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180870215] [2021-06-05 22:38:20,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180870215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:20,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097631892] [2021-06-05 22:38:20,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:20,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:20,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:20,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:20,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 22:38:20,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:20,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:20,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:20,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 22:38:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:20,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097631892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:20,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:20,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:38:20,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174989115] [2021-06-05 22:38:20,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:20,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:20,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:20,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:20,391 INFO L87 Difference]: Start difference. First operand 3928 states and 16478 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:21,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:21,797 INFO L93 Difference]: Finished difference Result 4446 states and 18479 transitions. [2021-06-05 22:38:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:38:21,797 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:21,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:21,805 INFO L225 Difference]: With dead ends: 4446 [2021-06-05 22:38:21,805 INFO L226 Difference]: Without dead ends: 4435 [2021-06-05 22:38:21,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1054.6ms TimeCoverageRelationStatistics Valid=255, Invalid=1815, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:38:21,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2021-06-05 22:38:21,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 3924. [2021-06-05 22:38:21,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.1962783583991845) internal successors, (16462), 3923 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16462 transitions. [2021-06-05 22:38:21,858 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16462 transitions. Word has length 23 [2021-06-05 22:38:21,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:21,858 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16462 transitions. [2021-06-05 22:38:21,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:21,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16462 transitions. [2021-06-05 22:38:21,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:21,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:21,863 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:22,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable944,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:22,064 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:22,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:22,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1579445, now seen corresponding path program 278 times [2021-06-05 22:38:22,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:22,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388289702] [2021-06-05 22:38:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:22,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:22,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388289702] [2021-06-05 22:38:22,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388289702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:22,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133496240] [2021-06-05 22:38:22,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:22,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:22,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:22,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:38:22,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:22,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:22,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 22:38:22,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:22,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:22,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:22,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 22:38:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:22,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133496240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:22,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:22,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:22,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676298873] [2021-06-05 22:38:22,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:22,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:22,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:22,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:22,364 INFO L87 Difference]: Start difference. First operand 3924 states and 16462 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:22,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:22,935 INFO L93 Difference]: Finished difference Result 4229 states and 17621 transitions. [2021-06-05 22:38:22,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:38:22,935 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:22,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:22,943 INFO L225 Difference]: With dead ends: 4229 [2021-06-05 22:38:22,943 INFO L226 Difference]: Without dead ends: 4220 [2021-06-05 22:38:22,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 453.0ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:38:22,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4220 states. [2021-06-05 22:38:23,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4220 to 3928. [2021-06-05 22:38:23,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 4.196842373312961) internal successors, (16481), 3927 states have internal predecessors, (16481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 16481 transitions. [2021-06-05 22:38:23,017 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 16481 transitions. Word has length 23 [2021-06-05 22:38:23,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:23,017 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 16481 transitions. [2021-06-05 22:38:23,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:23,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 16481 transitions. [2021-06-05 22:38:23,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:23,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:23,023 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:23,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable946,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:23,223 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:23,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1043155513, now seen corresponding path program 279 times [2021-06-05 22:38:23,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:23,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145204003] [2021-06-05 22:38:23,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:23,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:23,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145204003] [2021-06-05 22:38:23,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145204003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:23,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032864120] [2021-06-05 22:38:23,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:23,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:38:23,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:23,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:23,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:23,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:23,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:38:23,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:23,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:23,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:23,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:38:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:23,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032864120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:23,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:23,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:23,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283131412] [2021-06-05 22:38:23,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:23,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:23,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:23,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:23,540 INFO L87 Difference]: Start difference. First operand 3928 states and 16481 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:24,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:24,197 INFO L93 Difference]: Finished difference Result 4229 states and 17625 transitions. [2021-06-05 22:38:24,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:38:24,197 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:24,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:24,204 INFO L225 Difference]: With dead ends: 4229 [2021-06-05 22:38:24,204 INFO L226 Difference]: Without dead ends: 4220 [2021-06-05 22:38:24,204 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 581.0ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:38:24,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4220 states. [2021-06-05 22:38:24,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4220 to 3924. [2021-06-05 22:38:24,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.1962783583991845) internal successors, (16462), 3923 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:24,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16462 transitions. [2021-06-05 22:38:24,254 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16462 transitions. Word has length 23 [2021-06-05 22:38:24,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:24,255 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16462 transitions. [2021-06-05 22:38:24,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:24,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16462 transitions. [2021-06-05 22:38:24,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:24,260 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:24,260 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:24,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable947,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:24,460 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:24,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:24,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1928953793, now seen corresponding path program 280 times [2021-06-05 22:38:24,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:24,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782713320] [2021-06-05 22:38:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:24,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:24,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782713320] [2021-06-05 22:38:24,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782713320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:24,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559942803] [2021-06-05 22:38:24,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:24,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:24,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:24,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:24,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:24,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:24,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:38:24,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:24,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:24,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:24,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:38:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:24,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559942803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:24,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:24,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:24,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375462616] [2021-06-05 22:38:24,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:24,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:24,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:24,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:24,773 INFO L87 Difference]: Start difference. First operand 3924 states and 16462 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:25,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:25,518 INFO L93 Difference]: Finished difference Result 4391 states and 18255 transitions. [2021-06-05 22:38:25,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:38:25,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:25,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:25,526 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 22:38:25,526 INFO L226 Difference]: Without dead ends: 4382 [2021-06-05 22:38:25,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 548.1ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:38:25,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4382 states. [2021-06-05 22:38:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4382 to 3924. [2021-06-05 22:38:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.1962783583991845) internal successors, (16462), 3923 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16462 transitions. [2021-06-05 22:38:25,579 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16462 transitions. Word has length 23 [2021-06-05 22:38:25,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:25,579 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16462 transitions. [2021-06-05 22:38:25,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:25,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16462 transitions. [2021-06-05 22:38:25,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:25,585 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:25,585 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:25,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable949,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:25,785 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:25,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:25,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2114008075, now seen corresponding path program 281 times [2021-06-05 22:38:25,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:25,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202956106] [2021-06-05 22:38:25,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:25,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:25,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202956106] [2021-06-05 22:38:25,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202956106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:25,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396510053] [2021-06-05 22:38:25,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:25,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:38:25,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:25,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:25,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:25,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:25,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:38:25,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:26,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:26,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:26,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:38:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:26,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396510053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:26,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:26,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:26,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517720478] [2021-06-05 22:38:26,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:26,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:26,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:26,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:26,114 INFO L87 Difference]: Start difference. First operand 3924 states and 16462 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:26,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:26,870 INFO L93 Difference]: Finished difference Result 4220 states and 17589 transitions. [2021-06-05 22:38:26,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:38:26,870 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:26,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:26,878 INFO L225 Difference]: With dead ends: 4220 [2021-06-05 22:38:26,878 INFO L226 Difference]: Without dead ends: 4211 [2021-06-05 22:38:26,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 661.7ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:38:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4211 states. [2021-06-05 22:38:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4211 to 3928. [2021-06-05 22:38:26,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 4.196842373312961) internal successors, (16481), 3927 states have internal predecessors, (16481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:26,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 16481 transitions. [2021-06-05 22:38:26,930 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 16481 transitions. Word has length 23 [2021-06-05 22:38:26,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:26,930 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 16481 transitions. [2021-06-05 22:38:26,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:26,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 16481 transitions. [2021-06-05 22:38:26,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:26,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:26,935 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:27,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable951,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:27,136 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:27,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:27,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1139383153, now seen corresponding path program 282 times [2021-06-05 22:38:27,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:27,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507557109] [2021-06-05 22:38:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:27,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:27,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507557109] [2021-06-05 22:38:27,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507557109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:27,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410938114] [2021-06-05 22:38:27,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:27,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:38:27,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:27,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:27,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:27,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:27,374 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:38:27,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:38:27,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:27,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:27,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:27,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:43 [2021-06-05 22:38:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:27,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410938114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:27,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:27,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:38:27,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035173782] [2021-06-05 22:38:27,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:27,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:27,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:27,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:27,496 INFO L87 Difference]: Start difference. First operand 3928 states and 16481 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:28,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:28,023 INFO L93 Difference]: Finished difference Result 4108 states and 17143 transitions. [2021-06-05 22:38:28,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:38:28,023 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:28,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:28,031 INFO L225 Difference]: With dead ends: 4108 [2021-06-05 22:38:28,031 INFO L226 Difference]: Without dead ends: 4099 [2021-06-05 22:38:28,031 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 468.1ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:38:28,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2021-06-05 22:38:28,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 3924. [2021-06-05 22:38:28,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.1962783583991845) internal successors, (16462), 3923 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:28,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16462 transitions. [2021-06-05 22:38:28,082 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16462 transitions. Word has length 23 [2021-06-05 22:38:28,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:28,083 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16462 transitions. [2021-06-05 22:38:28,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:28,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16462 transitions. [2021-06-05 22:38:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:28,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:28,088 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:28,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable953,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:28,288 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:28,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:28,289 INFO L82 PathProgramCache]: Analyzing trace with hash 852261801, now seen corresponding path program 283 times [2021-06-05 22:38:28,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:28,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323143631] [2021-06-05 22:38:28,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:28,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:28,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323143631] [2021-06-05 22:38:28,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323143631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:28,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634660059] [2021-06-05 22:38:28,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:28,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:28,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:28,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:28,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:38:28,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:28,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:28,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:28,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:38:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:28,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634660059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:28,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:28,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:28,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141925129] [2021-06-05 22:38:28,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:28,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:28,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:28,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:28,615 INFO L87 Difference]: Start difference. First operand 3924 states and 16462 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:29,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:29,356 INFO L93 Difference]: Finished difference Result 4206 states and 17536 transitions. [2021-06-05 22:38:29,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:38:29,357 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:29,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:29,364 INFO L225 Difference]: With dead ends: 4206 [2021-06-05 22:38:29,364 INFO L226 Difference]: Without dead ends: 4197 [2021-06-05 22:38:29,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 650.8ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:38:29,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4197 states. [2021-06-05 22:38:29,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4197 to 3917. [2021-06-05 22:38:29,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3917 states, 3916 states have (on average 4.202247191011236) internal successors, (16456), 3916 states have internal predecessors, (16456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:29,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3917 states to 3917 states and 16456 transitions. [2021-06-05 22:38:29,414 INFO L78 Accepts]: Start accepts. Automaton has 3917 states and 16456 transitions. Word has length 23 [2021-06-05 22:38:29,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:29,414 INFO L482 AbstractCegarLoop]: Abstraction has 3917 states and 16456 transitions. [2021-06-05 22:38:29,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:29,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3917 states and 16456 transitions. [2021-06-05 22:38:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:29,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:29,419 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:29,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable957 [2021-06-05 22:38:29,620 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:29,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:29,620 INFO L82 PathProgramCache]: Analyzing trace with hash 359044415, now seen corresponding path program 284 times [2021-06-05 22:38:29,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:29,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272396567] [2021-06-05 22:38:29,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:29,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:29,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272396567] [2021-06-05 22:38:29,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272396567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:29,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086233792] [2021-06-05 22:38:29,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:29,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:29,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:29,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:38:29,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:29,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:29,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:29,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:29,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 22:38:29,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:29,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:29,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:29,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 22:38:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:29,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086233792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:29,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:29,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:29,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285696845] [2021-06-05 22:38:29,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:29,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:29,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:29,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:29,935 INFO L87 Difference]: Start difference. First operand 3917 states and 16456 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:30,639 INFO L93 Difference]: Finished difference Result 4140 states and 17293 transitions. [2021-06-05 22:38:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:38:30,639 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:30,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:30,646 INFO L225 Difference]: With dead ends: 4140 [2021-06-05 22:38:30,646 INFO L226 Difference]: Without dead ends: 4129 [2021-06-05 22:38:30,647 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 505.8ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:38:30,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4129 states. [2021-06-05 22:38:30,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4129 to 3921. [2021-06-05 22:38:30,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3921 states, 3920 states have (on average 4.202551020408163) internal successors, (16474), 3920 states have internal predecessors, (16474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3921 states to 3921 states and 16474 transitions. [2021-06-05 22:38:30,697 INFO L78 Accepts]: Start accepts. Automaton has 3921 states and 16474 transitions. Word has length 23 [2021-06-05 22:38:30,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:30,697 INFO L482 AbstractCegarLoop]: Abstraction has 3921 states and 16474 transitions. [2021-06-05 22:38:30,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:30,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3921 states and 16474 transitions. [2021-06-05 22:38:30,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:30,702 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:30,702 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:30,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable959,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:30,903 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:30,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:30,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1293820671, now seen corresponding path program 285 times [2021-06-05 22:38:30,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:30,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599002462] [2021-06-05 22:38:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:31,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:31,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599002462] [2021-06-05 22:38:31,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599002462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:31,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630223191] [2021-06-05 22:38:31,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:31,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:38:31,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:31,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:38:31,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:31,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:31,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:31,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 22:38:31,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:31,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:31,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:31,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:16 [2021-06-05 22:38:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:31,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630223191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:31,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:31,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:31,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201517551] [2021-06-05 22:38:31,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:31,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:31,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:31,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:31,191 INFO L87 Difference]: Start difference. First operand 3921 states and 16474 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:31,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:31,448 INFO L93 Difference]: Finished difference Result 4246 states and 17704 transitions. [2021-06-05 22:38:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:38:31,448 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:31,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:31,455 INFO L225 Difference]: With dead ends: 4246 [2021-06-05 22:38:31,456 INFO L226 Difference]: Without dead ends: 4232 [2021-06-05 22:38:31,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 252.2ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:38:31,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4232 states. [2021-06-05 22:38:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4232 to 3945. [2021-06-05 22:38:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3944 states have (on average 4.205121703853956) internal successors, (16585), 3944 states have internal predecessors, (16585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 16585 transitions. [2021-06-05 22:38:31,508 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 16585 transitions. Word has length 23 [2021-06-05 22:38:31,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:31,508 INFO L482 AbstractCegarLoop]: Abstraction has 3945 states and 16585 transitions. [2021-06-05 22:38:31,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:31,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 16585 transitions. [2021-06-05 22:38:31,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:31,514 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:31,514 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:31,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable960,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:31,714 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:31,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:31,715 INFO L82 PathProgramCache]: Analyzing trace with hash 281128139, now seen corresponding path program 286 times [2021-06-05 22:38:31,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:31,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366575549] [2021-06-05 22:38:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:31,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:31,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366575549] [2021-06-05 22:38:31,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366575549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:31,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33608876] [2021-06-05 22:38:31,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:31,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:31,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:31,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:31,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:31,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:31,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:38:31,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:31,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:31,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:31,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:38:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:32,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33608876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:32,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:32,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:32,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648923780] [2021-06-05 22:38:32,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:32,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:32,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:32,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:32,072 INFO L87 Difference]: Start difference. First operand 3945 states and 16585 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:33,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:33,138 INFO L93 Difference]: Finished difference Result 4182 states and 17468 transitions. [2021-06-05 22:38:33,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:38:33,138 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:33,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:33,145 INFO L225 Difference]: With dead ends: 4182 [2021-06-05 22:38:33,145 INFO L226 Difference]: Without dead ends: 4171 [2021-06-05 22:38:33,146 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 988.6ms TimeCoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:38:33,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2021-06-05 22:38:33,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 3926. [2021-06-05 22:38:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3925 states have (on average 4.202292993630573) internal successors, (16494), 3925 states have internal predecessors, (16494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 16494 transitions. [2021-06-05 22:38:33,196 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 16494 transitions. Word has length 23 [2021-06-05 22:38:33,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:33,196 INFO L482 AbstractCegarLoop]: Abstraction has 3926 states and 16494 transitions. [2021-06-05 22:38:33,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 16494 transitions. [2021-06-05 22:38:33,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:33,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:33,202 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:33,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable961 [2021-06-05 22:38:33,402 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:33,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:33,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1436358031, now seen corresponding path program 287 times [2021-06-05 22:38:33,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:33,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210094777] [2021-06-05 22:38:33,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:33,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:33,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210094777] [2021-06-05 22:38:33,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210094777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:33,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007497869] [2021-06-05 22:38:33,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:33,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:38:33,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:33,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:33,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:33,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:33,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:38:33,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:33,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:33,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:33,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:38:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:33,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007497869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:33,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:33,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:33,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712601292] [2021-06-05 22:38:33,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:33,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:33,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:33,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:33,707 INFO L87 Difference]: Start difference. First operand 3926 states and 16494 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:34,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:34,515 INFO L93 Difference]: Finished difference Result 4513 states and 18763 transitions. [2021-06-05 22:38:34,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:38:34,516 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:34,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:34,525 INFO L225 Difference]: With dead ends: 4513 [2021-06-05 22:38:34,525 INFO L226 Difference]: Without dead ends: 4504 [2021-06-05 22:38:34,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 570.5ms TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:38:34,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4504 states. [2021-06-05 22:38:34,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4504 to 3928. [2021-06-05 22:38:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 4.201680672268908) internal successors, (16500), 3927 states have internal predecessors, (16500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 16500 transitions. [2021-06-05 22:38:34,599 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 16500 transitions. Word has length 23 [2021-06-05 22:38:34,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:34,600 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 16500 transitions. [2021-06-05 22:38:34,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:34,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 16500 transitions. [2021-06-05 22:38:34,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:34,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:34,607 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:34,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable963,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:34,807 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:34,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:34,807 INFO L82 PathProgramCache]: Analyzing trace with hash -396122233, now seen corresponding path program 288 times [2021-06-05 22:38:34,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:34,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129580271] [2021-06-05 22:38:34,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:34,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:34,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129580271] [2021-06-05 22:38:34,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129580271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:34,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399130020] [2021-06-05 22:38:34,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:34,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:38:34,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:34,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:34,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:35,055 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:38:35,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 22:38:35,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:35,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:35,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:35,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:38 [2021-06-05 22:38:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:35,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399130020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:35,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:35,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:38:35,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579055723] [2021-06-05 22:38:35,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:35,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:35,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:35,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:35,160 INFO L87 Difference]: Start difference. First operand 3928 states and 16500 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:35,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:35,702 INFO L93 Difference]: Finished difference Result 4164 states and 17397 transitions. [2021-06-05 22:38:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:38:35,703 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:35,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:35,710 INFO L225 Difference]: With dead ends: 4164 [2021-06-05 22:38:35,710 INFO L226 Difference]: Without dead ends: 4155 [2021-06-05 22:38:35,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 480.4ms TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:38:35,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-05 22:38:35,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3932. [2021-06-05 22:38:35,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3932 states, 3931 states have (on average 4.201475451539048) internal successors, (16516), 3931 states have internal predecessors, (16516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 16516 transitions. [2021-06-05 22:38:35,761 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 16516 transitions. Word has length 23 [2021-06-05 22:38:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:35,761 INFO L482 AbstractCegarLoop]: Abstraction has 3932 states and 16516 transitions. [2021-06-05 22:38:35,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:35,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 16516 transitions. [2021-06-05 22:38:35,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:35,766 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:35,766 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:35,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-06-05 22:38:35,967 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:35,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:35,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1408814765, now seen corresponding path program 289 times [2021-06-05 22:38:35,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:35,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397773751] [2021-06-05 22:38:35,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:36,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:36,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397773751] [2021-06-05 22:38:36,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397773751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:36,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335437897] [2021-06-05 22:38:36,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:36,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:36,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:36,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:36,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:38:36,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:36,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:36,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:36,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:38:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:36,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335437897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:36,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:36,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:36,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618606283] [2021-06-05 22:38:36,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:36,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:36,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:36,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:36,287 INFO L87 Difference]: Start difference. First operand 3932 states and 16516 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:37,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:37,207 INFO L93 Difference]: Finished difference Result 4346 states and 18114 transitions. [2021-06-05 22:38:37,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:38:37,207 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:37,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:37,215 INFO L225 Difference]: With dead ends: 4346 [2021-06-05 22:38:37,215 INFO L226 Difference]: Without dead ends: 4335 [2021-06-05 22:38:37,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 801.5ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:38:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-06-05 22:38:37,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 3924. [2021-06-05 22:38:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.201376497578384) internal successors, (16482), 3923 states have internal predecessors, (16482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16482 transitions. [2021-06-05 22:38:37,269 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16482 transitions. Word has length 23 [2021-06-05 22:38:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:37,269 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16482 transitions. [2021-06-05 22:38:37,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16482 transitions. [2021-06-05 22:38:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:37,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:37,275 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:37,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable969,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:37,475 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:37,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:37,475 INFO L82 PathProgramCache]: Analyzing trace with hash -927467449, now seen corresponding path program 290 times [2021-06-05 22:38:37,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:37,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258519438] [2021-06-05 22:38:37,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:37,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:37,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258519438] [2021-06-05 22:38:37,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258519438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:37,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365009164] [2021-06-05 22:38:37,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:37,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:37,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:37,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:37,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:37,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:37,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:38:37,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:37,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:37,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:37,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:38:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:37,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365009164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:37,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:37,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:37,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99179739] [2021-06-05 22:38:37,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:37,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:37,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:37,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:37,763 INFO L87 Difference]: Start difference. First operand 3924 states and 16482 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:38,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:38,744 INFO L93 Difference]: Finished difference Result 4799 states and 19930 transitions. [2021-06-05 22:38:38,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:38:38,744 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:38,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:38,753 INFO L225 Difference]: With dead ends: 4799 [2021-06-05 22:38:38,753 INFO L226 Difference]: Without dead ends: 4777 [2021-06-05 22:38:38,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 668.1ms TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:38:38,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2021-06-05 22:38:38,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 3936. [2021-06-05 22:38:38,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3936 states, 3935 states have (on average 4.20279542566709) internal successors, (16538), 3935 states have internal predecessors, (16538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:38,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3936 states to 3936 states and 16538 transitions. [2021-06-05 22:38:38,808 INFO L78 Accepts]: Start accepts. Automaton has 3936 states and 16538 transitions. Word has length 23 [2021-06-05 22:38:38,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:38,808 INFO L482 AbstractCegarLoop]: Abstraction has 3936 states and 16538 transitions. [2021-06-05 22:38:38,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:38,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3936 states and 16538 transitions. [2021-06-05 22:38:38,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:38,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:38,814 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:39,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable971 [2021-06-05 22:38:39,014 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:39,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:39,015 INFO L82 PathProgramCache]: Analyzing trace with hash -342133497, now seen corresponding path program 291 times [2021-06-05 22:38:39,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:39,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631808391] [2021-06-05 22:38:39,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:39,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:39,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631808391] [2021-06-05 22:38:39,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631808391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:39,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402484234] [2021-06-05 22:38:39,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:39,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:38:39,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:39,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:39,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:39,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:39,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:38:39,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:39,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:39,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:39,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:38:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:39,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402484234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:39,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:39,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:39,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413873702] [2021-06-05 22:38:39,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:39,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:39,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:39,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:39,340 INFO L87 Difference]: Start difference. First operand 3936 states and 16538 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:39,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:39,936 INFO L93 Difference]: Finished difference Result 4590 states and 19078 transitions. [2021-06-05 22:38:39,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:38:39,937 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:39,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:39,944 INFO L225 Difference]: With dead ends: 4590 [2021-06-05 22:38:39,944 INFO L226 Difference]: Without dead ends: 4564 [2021-06-05 22:38:39,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 574.5ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:38:39,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4564 states. [2021-06-05 22:38:39,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4564 to 3940. [2021-06-05 22:38:39,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3940 states, 3939 states have (on average 4.202589489718203) internal successors, (16554), 3939 states have internal predecessors, (16554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:39,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3940 states to 3940 states and 16554 transitions. [2021-06-05 22:38:39,997 INFO L78 Accepts]: Start accepts. Automaton has 3940 states and 16554 transitions. Word has length 23 [2021-06-05 22:38:39,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:39,997 INFO L482 AbstractCegarLoop]: Abstraction has 3940 states and 16554 transitions. [2021-06-05 22:38:39,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:39,997 INFO L276 IsEmpty]: Start isEmpty. Operand 3940 states and 16554 transitions. [2021-06-05 22:38:40,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:40,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:40,002 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:40,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable973,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:40,203 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:40,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:40,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1271433237, now seen corresponding path program 292 times [2021-06-05 22:38:40,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:40,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016992073] [2021-06-05 22:38:40,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:40,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:40,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016992073] [2021-06-05 22:38:40,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016992073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:40,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534858828] [2021-06-05 22:38:40,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:40,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:40,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:40,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:40,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:40,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:40,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:38:40,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:40,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:40,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:40,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:38:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:40,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534858828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:40,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:40,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:40,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654786625] [2021-06-05 22:38:40,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:40,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:40,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:40,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:40,500 INFO L87 Difference]: Start difference. First operand 3940 states and 16554 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:41,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:41,327 INFO L93 Difference]: Finished difference Result 4617 states and 19188 transitions. [2021-06-05 22:38:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:38:41,327 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:41,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:41,335 INFO L225 Difference]: With dead ends: 4617 [2021-06-05 22:38:41,335 INFO L226 Difference]: Without dead ends: 4596 [2021-06-05 22:38:41,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 730.4ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:38:41,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4596 states. [2021-06-05 22:38:41,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4596 to 3932. [2021-06-05 22:38:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3932 states, 3931 states have (on average 4.202493004324599) internal successors, (16520), 3931 states have internal predecessors, (16520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 16520 transitions. [2021-06-05 22:38:41,413 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 16520 transitions. Word has length 23 [2021-06-05 22:38:41,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:41,413 INFO L482 AbstractCegarLoop]: Abstraction has 3932 states and 16520 transitions. [2021-06-05 22:38:41,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:41,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 16520 transitions. [2021-06-05 22:38:41,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:41,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:41,418 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:41,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-06-05 22:38:41,618 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:41,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:41,619 INFO L82 PathProgramCache]: Analyzing trace with hash -577970071, now seen corresponding path program 293 times [2021-06-05 22:38:41,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:41,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103863579] [2021-06-05 22:38:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:41,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:41,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103863579] [2021-06-05 22:38:41,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103863579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:41,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468316567] [2021-06-05 22:38:41,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:41,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:38:41,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:41,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:41,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:41,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:41,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:38:41,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:41,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:41,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:41,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:38:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:41,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468316567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:41,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:41,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:41,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219414892] [2021-06-05 22:38:41,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:41,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:41,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:41,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:41,909 INFO L87 Difference]: Start difference. First operand 3932 states and 16520 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:42,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:42,536 INFO L93 Difference]: Finished difference Result 4741 states and 19672 transitions. [2021-06-05 22:38:42,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:38:42,537 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:42,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:42,545 INFO L225 Difference]: With dead ends: 4741 [2021-06-05 22:38:42,545 INFO L226 Difference]: Without dead ends: 4706 [2021-06-05 22:38:42,545 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 470.9ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:38:42,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4706 states. [2021-06-05 22:38:42,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4706 to 3940. [2021-06-05 22:38:42,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3940 states, 3939 states have (on average 4.202589489718203) internal successors, (16554), 3939 states have internal predecessors, (16554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3940 states to 3940 states and 16554 transitions. [2021-06-05 22:38:42,599 INFO L78 Accepts]: Start accepts. Automaton has 3940 states and 16554 transitions. Word has length 23 [2021-06-05 22:38:42,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:42,599 INFO L482 AbstractCegarLoop]: Abstraction has 3940 states and 16554 transitions. [2021-06-05 22:38:42,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:42,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3940 states and 16554 transitions. [2021-06-05 22:38:42,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:42,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:42,605 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:42,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable977,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:42,805 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:42,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:42,805 INFO L82 PathProgramCache]: Analyzing trace with hash -496571015, now seen corresponding path program 294 times [2021-06-05 22:38:42,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:42,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254709524] [2021-06-05 22:38:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:42,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:42,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254709524] [2021-06-05 22:38:42,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254709524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:42,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671384600] [2021-06-05 22:38:42,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:42,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:38:42,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:42,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:38:42,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:43,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:43,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:38:43,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:43,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:43,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:43,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 22:38:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:43,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671384600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:43,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:43,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:43,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584569245] [2021-06-05 22:38:43,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:43,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:43,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:43,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:43,079 INFO L87 Difference]: Start difference. First operand 3940 states and 16554 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:43,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:43,732 INFO L93 Difference]: Finished difference Result 4430 states and 18449 transitions. [2021-06-05 22:38:43,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:38:43,732 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:43,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:43,740 INFO L225 Difference]: With dead ends: 4430 [2021-06-05 22:38:43,740 INFO L226 Difference]: Without dead ends: 4404 [2021-06-05 22:38:43,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 409.5ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:38:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-06-05 22:38:43,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 3944. [2021-06-05 22:38:43,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3944 states, 3943 states have (on average 4.202383971595232) internal successors, (16570), 3943 states have internal predecessors, (16570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:43,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3944 states to 3944 states and 16570 transitions. [2021-06-05 22:38:43,791 INFO L78 Accepts]: Start accepts. Automaton has 3944 states and 16570 transitions. Word has length 23 [2021-06-05 22:38:43,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:43,791 INFO L482 AbstractCegarLoop]: Abstraction has 3944 states and 16570 transitions. [2021-06-05 22:38:43,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3944 states and 16570 transitions. [2021-06-05 22:38:43,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:43,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:43,796 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:43,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable979,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:43,996 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:43,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:43,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1116995719, now seen corresponding path program 295 times [2021-06-05 22:38:43,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:43,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355846278] [2021-06-05 22:38:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:44,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:44,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355846278] [2021-06-05 22:38:44,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355846278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:44,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149107762] [2021-06-05 22:38:44,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:44,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:44,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:44,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:44,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:38:44,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:44,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:44,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:44,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:38:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:44,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149107762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:44,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:44,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:44,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522062711] [2021-06-05 22:38:44,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:44,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:44,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:44,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:44,294 INFO L87 Difference]: Start difference. First operand 3944 states and 16570 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:45,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:45,160 INFO L93 Difference]: Finished difference Result 4566 states and 18992 transitions. [2021-06-05 22:38:45,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:38:45,160 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:45,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:45,168 INFO L225 Difference]: With dead ends: 4566 [2021-06-05 22:38:45,169 INFO L226 Difference]: Without dead ends: 4545 [2021-06-05 22:38:45,169 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 689.8ms TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:38:45,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4545 states. [2021-06-05 22:38:45,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4545 to 3938. [2021-06-05 22:38:45,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3937 states have (on average 4.203200406400812) internal successors, (16548), 3937 states have internal predecessors, (16548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:45,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 16548 transitions. [2021-06-05 22:38:45,222 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 16548 transitions. Word has length 23 [2021-06-05 22:38:45,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:45,222 INFO L482 AbstractCegarLoop]: Abstraction has 3938 states and 16548 transitions. [2021-06-05 22:38:45,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:45,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 16548 transitions. [2021-06-05 22:38:45,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:45,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:45,227 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:45,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable980,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:45,428 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:45,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:45,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1253245707, now seen corresponding path program 296 times [2021-06-05 22:38:45,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:45,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081777452] [2021-06-05 22:38:45,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:45,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:45,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081777452] [2021-06-05 22:38:45,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081777452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:45,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553960410] [2021-06-05 22:38:45,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:45,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:45,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:45,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:45,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:45,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:45,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:38:45,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:45,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:45,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:45,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:38:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:45,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553960410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:45,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:45,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:45,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325604252] [2021-06-05 22:38:45,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:45,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:45,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:45,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:45,720 INFO L87 Difference]: Start difference. First operand 3938 states and 16548 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:46,425 INFO L93 Difference]: Finished difference Result 4424 states and 18447 transitions. [2021-06-05 22:38:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:38:46,425 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:46,434 INFO L225 Difference]: With dead ends: 4424 [2021-06-05 22:38:46,434 INFO L226 Difference]: Without dead ends: 4402 [2021-06-05 22:38:46,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 562.7ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:38:46,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4402 states. [2021-06-05 22:38:46,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4402 to 3946. [2021-06-05 22:38:46,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 4.203548795944233) internal successors, (16583), 3945 states have internal predecessors, (16583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:46,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 16583 transitions. [2021-06-05 22:38:46,488 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 16583 transitions. Word has length 23 [2021-06-05 22:38:46,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:46,488 INFO L482 AbstractCegarLoop]: Abstraction has 3946 states and 16583 transitions. [2021-06-05 22:38:46,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:46,489 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 16583 transitions. [2021-06-05 22:38:46,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:46,494 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:46,494 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:46,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable982 [2021-06-05 22:38:46,694 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:46,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:46,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1838579659, now seen corresponding path program 297 times [2021-06-05 22:38:46,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:46,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139269774] [2021-06-05 22:38:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:46,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:46,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139269774] [2021-06-05 22:38:46,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139269774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:46,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025050179] [2021-06-05 22:38:46,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:46,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:38:46,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:46,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:46,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:46,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:46,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:38:46,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:46,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:46,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:46,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:38:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:46,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025050179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:46,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:46,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:46,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369700921] [2021-06-05 22:38:46,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:46,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:47,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:47,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:47,000 INFO L87 Difference]: Start difference. First operand 3946 states and 16583 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:47,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:47,723 INFO L93 Difference]: Finished difference Result 4312 states and 17981 transitions. [2021-06-05 22:38:47,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:38:47,724 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:47,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:47,731 INFO L225 Difference]: With dead ends: 4312 [2021-06-05 22:38:47,731 INFO L226 Difference]: Without dead ends: 4286 [2021-06-05 22:38:47,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 570.3ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:38:47,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2021-06-05 22:38:47,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 3950. [2021-06-05 22:38:47,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3950 states, 3949 states have (on average 4.203342618384401) internal successors, (16599), 3949 states have internal predecessors, (16599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3950 states to 3950 states and 16599 transitions. [2021-06-05 22:38:47,783 INFO L78 Accepts]: Start accepts. Automaton has 3950 states and 16599 transitions. Word has length 23 [2021-06-05 22:38:47,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:47,783 INFO L482 AbstractCegarLoop]: Abstraction has 3950 states and 16599 transitions. [2021-06-05 22:38:47,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:47,783 INFO L276 IsEmpty]: Start isEmpty. Operand 3950 states and 16599 transitions. [2021-06-05 22:38:47,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:47,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:47,788 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:47,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable984 [2021-06-05 22:38:47,989 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:47,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:47,989 INFO L82 PathProgramCache]: Analyzing trace with hash -842820903, now seen corresponding path program 298 times [2021-06-05 22:38:47,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:47,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715060490] [2021-06-05 22:38:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:48,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:48,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:48,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715060490] [2021-06-05 22:38:48,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715060490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:48,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270236205] [2021-06-05 22:38:48,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:48,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:48,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:48,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:48,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:48,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:48,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:38:48,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:48,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:48,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:48,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:38:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:48,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270236205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:48,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:48,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:48,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129350918] [2021-06-05 22:38:48,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:48,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:48,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:48,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:48,315 INFO L87 Difference]: Start difference. First operand 3950 states and 16599 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:49,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:49,154 INFO L93 Difference]: Finished difference Result 4333 states and 18069 transitions. [2021-06-05 22:38:49,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:38:49,155 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:49,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:49,162 INFO L225 Difference]: With dead ends: 4333 [2021-06-05 22:38:49,162 INFO L226 Difference]: Without dead ends: 4312 [2021-06-05 22:38:49,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 780.9ms TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:38:49,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2021-06-05 22:38:49,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 3942. [2021-06-05 22:38:49,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 3941 states have (on average 4.203247906622685) internal successors, (16565), 3941 states have internal predecessors, (16565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:49,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 16565 transitions. [2021-06-05 22:38:49,215 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 16565 transitions. Word has length 23 [2021-06-05 22:38:49,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:49,215 INFO L482 AbstractCegarLoop]: Abstraction has 3942 states and 16565 transitions. [2021-06-05 22:38:49,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 16565 transitions. [2021-06-05 22:38:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:49,220 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:49,220 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:49,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable986,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:49,420 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:49,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:49,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1026024327, now seen corresponding path program 299 times [2021-06-05 22:38:49,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:49,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922400041] [2021-06-05 22:38:49,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:49,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:49,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922400041] [2021-06-05 22:38:49,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922400041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:49,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840947712] [2021-06-05 22:38:49,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:49,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:38:49,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:49,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:49,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:49,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:49,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:38:49,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:49,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:49,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:49,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:38:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:49,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840947712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:49,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:49,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:49,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802583189] [2021-06-05 22:38:49,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:49,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:49,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:49,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:49,716 INFO L87 Difference]: Start difference. First operand 3942 states and 16565 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:50,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:50,539 INFO L93 Difference]: Finished difference Result 4444 states and 18530 transitions. [2021-06-05 22:38:50,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:38:50,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:50,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:50,547 INFO L225 Difference]: With dead ends: 4444 [2021-06-05 22:38:50,547 INFO L226 Difference]: Without dead ends: 4422 [2021-06-05 22:38:50,547 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 582.1ms TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:38:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4422 states. [2021-06-05 22:38:50,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4422 to 3948. [2021-06-05 22:38:50,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3948 states, 3947 states have (on average 4.203699011907778) internal successors, (16592), 3947 states have internal predecessors, (16592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:50,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3948 states to 3948 states and 16592 transitions. [2021-06-05 22:38:50,620 INFO L78 Accepts]: Start accepts. Automaton has 3948 states and 16592 transitions. Word has length 23 [2021-06-05 22:38:50,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:50,620 INFO L482 AbstractCegarLoop]: Abstraction has 3948 states and 16592 transitions. [2021-06-05 22:38:50,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:50,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3948 states and 16592 transitions. [2021-06-05 22:38:50,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:50,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:50,625 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:50,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable988 [2021-06-05 22:38:50,825 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:50,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:50,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1539551179, now seen corresponding path program 300 times [2021-06-05 22:38:50,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:50,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578718649] [2021-06-05 22:38:50,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:50,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:50,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:50,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578718649] [2021-06-05 22:38:50,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578718649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:50,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306958211] [2021-06-05 22:38:50,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:50,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:38:50,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:50,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:50,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:51,065 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 22:38:51,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 68 [2021-06-05 22:38:51,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:51,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:51,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:51,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:48 [2021-06-05 22:38:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:51,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306958211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:51,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:51,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:38:51,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639237867] [2021-06-05 22:38:51,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:51,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:51,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:51,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:51,149 INFO L87 Difference]: Start difference. First operand 3948 states and 16592 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:51,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:51,975 INFO L93 Difference]: Finished difference Result 4456 states and 18557 transitions. [2021-06-05 22:38:51,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:38:51,975 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:51,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:51,983 INFO L225 Difference]: With dead ends: 4456 [2021-06-05 22:38:51,983 INFO L226 Difference]: Without dead ends: 4431 [2021-06-05 22:38:51,984 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 569.8ms TimeCoverageRelationStatistics Valid=193, Invalid=1289, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:38:51,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4431 states. [2021-06-05 22:38:52,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4431 to 3952. [2021-06-05 22:38:52,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 4.2034927866362946) internal successors, (16608), 3951 states have internal predecessors, (16608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 16608 transitions. [2021-06-05 22:38:52,036 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 16608 transitions. Word has length 23 [2021-06-05 22:38:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:52,036 INFO L482 AbstractCegarLoop]: Abstraction has 3952 states and 16608 transitions. [2021-06-05 22:38:52,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 16608 transitions. [2021-06-05 22:38:52,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:52,041 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:52,041 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:52,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable990,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:52,242 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:52,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:52,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1679704961, now seen corresponding path program 301 times [2021-06-05 22:38:52,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:52,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871324288] [2021-06-05 22:38:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:52,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:52,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871324288] [2021-06-05 22:38:52,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871324288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:52,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28969871] [2021-06-05 22:38:52,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:52,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:52,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:52,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:52,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:38:52,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:52,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:52,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:52,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:38:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:52,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28969871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:52,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:52,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:52,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718426155] [2021-06-05 22:38:52,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:52,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:52,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:52,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:52,545 INFO L87 Difference]: Start difference. First operand 3952 states and 16608 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:53,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:53,418 INFO L93 Difference]: Finished difference Result 4363 states and 18192 transitions. [2021-06-05 22:38:53,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:38:53,419 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:53,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:53,426 INFO L225 Difference]: With dead ends: 4363 [2021-06-05 22:38:53,426 INFO L226 Difference]: Without dead ends: 4342 [2021-06-05 22:38:53,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 747.5ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:38:53,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4342 states. [2021-06-05 22:38:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4342 to 3944. [2021-06-05 22:38:53,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3944 states, 3943 states have (on average 4.2033984275932035) internal successors, (16574), 3943 states have internal predecessors, (16574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:53,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3944 states to 3944 states and 16574 transitions. [2021-06-05 22:38:53,477 INFO L78 Accepts]: Start accepts. Automaton has 3944 states and 16574 transitions. Word has length 23 [2021-06-05 22:38:53,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:53,477 INFO L482 AbstractCegarLoop]: Abstraction has 3944 states and 16574 transitions. [2021-06-05 22:38:53,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:53,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3944 states and 16574 transitions. [2021-06-05 22:38:53,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:53,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:53,483 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:53,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-06-05 22:38:53,683 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:53,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:53,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1398709109, now seen corresponding path program 302 times [2021-06-05 22:38:53,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:53,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894630379] [2021-06-05 22:38:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:53,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:53,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894630379] [2021-06-05 22:38:53,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894630379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:53,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888168568] [2021-06-05 22:38:53,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:53,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:53,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:53,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:53,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:53,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:53,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:38:53,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:53,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:53,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:53,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:38:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:54,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888168568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:54,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:54,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:54,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329496849] [2021-06-05 22:38:54,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:54,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:54,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:54,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:54,016 INFO L87 Difference]: Start difference. First operand 3944 states and 16574 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:54,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:54,432 INFO L93 Difference]: Finished difference Result 4231 states and 17663 transitions. [2021-06-05 22:38:54,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:38:54,432 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:54,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:54,440 INFO L225 Difference]: With dead ends: 4231 [2021-06-05 22:38:54,440 INFO L226 Difference]: Without dead ends: 4205 [2021-06-05 22:38:54,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 407.9ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:38:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4205 states. [2021-06-05 22:38:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4205 to 3953. [2021-06-05 22:38:54,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 4.201923076923077) internal successors, (16606), 3952 states have internal predecessors, (16606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:54,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 16606 transitions. [2021-06-05 22:38:54,493 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 16606 transitions. Word has length 23 [2021-06-05 22:38:54,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:54,493 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 16606 transitions. [2021-06-05 22:38:54,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:54,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 16606 transitions. [2021-06-05 22:38:54,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:54,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:54,498 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:54,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable996 [2021-06-05 22:38:54,699 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:54,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:54,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1854682119, now seen corresponding path program 303 times [2021-06-05 22:38:54,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:54,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522807916] [2021-06-05 22:38:54,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:54,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:54,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522807916] [2021-06-05 22:38:54,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522807916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:54,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377117844] [2021-06-05 22:38:54,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:54,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:38:54,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:54,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:54,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:54,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:54,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:38:54,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:54,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:54,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:54,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:38:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:55,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377117844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:55,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:55,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:55,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636414358] [2021-06-05 22:38:55,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:55,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:55,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:55,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:55,016 INFO L87 Difference]: Start difference. First operand 3953 states and 16606 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:55,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:55,424 INFO L93 Difference]: Finished difference Result 4230 states and 17658 transitions. [2021-06-05 22:38:55,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:38:55,425 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:55,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:55,432 INFO L225 Difference]: With dead ends: 4230 [2021-06-05 22:38:55,432 INFO L226 Difference]: Without dead ends: 4202 [2021-06-05 22:38:55,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 374.7ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:38:55,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4202 states. [2021-06-05 22:38:55,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4202 to 3946. [2021-06-05 22:38:55,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 4.203295310519645) internal successors, (16582), 3945 states have internal predecessors, (16582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:55,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 16582 transitions. [2021-06-05 22:38:55,483 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 16582 transitions. Word has length 23 [2021-06-05 22:38:55,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:55,483 INFO L482 AbstractCegarLoop]: Abstraction has 3946 states and 16582 transitions. [2021-06-05 22:38:55,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:55,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 16582 transitions. [2021-06-05 22:38:55,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:55,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:55,489 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:55,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable998 [2021-06-05 22:38:55,689 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:55,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:55,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1567560767, now seen corresponding path program 304 times [2021-06-05 22:38:55,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:55,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262351077] [2021-06-05 22:38:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:55,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:55,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262351077] [2021-06-05 22:38:55,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262351077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:55,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505696919] [2021-06-05 22:38:55,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:55,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:55,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:55,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:55,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:55,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:55,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:38:55,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:55,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:55,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:55,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:38:56,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:56,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505696919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:56,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:56,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:56,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927437993] [2021-06-05 22:38:56,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:56,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:56,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:56,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:56,019 INFO L87 Difference]: Start difference. First operand 3946 states and 16582 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:56,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:56,497 INFO L93 Difference]: Finished difference Result 4279 states and 17852 transitions. [2021-06-05 22:38:56,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:38:56,497 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:56,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:56,505 INFO L225 Difference]: With dead ends: 4279 [2021-06-05 22:38:56,505 INFO L226 Difference]: Without dead ends: 4253 [2021-06-05 22:38:56,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 505.2ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:38:56,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4253 states. [2021-06-05 22:38:56,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4253 to 3950. [2021-06-05 22:38:56,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3950 states, 3949 states have (on average 4.203089389718916) internal successors, (16598), 3949 states have internal predecessors, (16598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:56,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3950 states to 3950 states and 16598 transitions. [2021-06-05 22:38:56,555 INFO L78 Accepts]: Start accepts. Automaton has 3950 states and 16598 transitions. Word has length 23 [2021-06-05 22:38:56,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:56,555 INFO L482 AbstractCegarLoop]: Abstraction has 3950 states and 16598 transitions. [2021-06-05 22:38:56,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:56,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3950 states and 16598 transitions. [2021-06-05 22:38:56,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:56,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:56,561 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:56,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1000,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:56,761 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:56,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:56,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1074343381, now seen corresponding path program 305 times [2021-06-05 22:38:56,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:56,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023789396] [2021-06-05 22:38:56,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:56,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:56,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:56,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023789396] [2021-06-05 22:38:56,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023789396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:56,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888209997] [2021-06-05 22:38:56,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:56,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:38:56,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:56,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:56,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:56,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:56,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:38:56,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:56,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:56,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:56,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:38:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:57,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888209997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:57,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:57,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:57,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915413515] [2021-06-05 22:38:57,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:57,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:57,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:57,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:57,081 INFO L87 Difference]: Start difference. First operand 3950 states and 16598 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:57,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:57,837 INFO L93 Difference]: Finished difference Result 4279 states and 17856 transitions. [2021-06-05 22:38:57,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:38:57,837 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:57,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:57,844 INFO L225 Difference]: With dead ends: 4279 [2021-06-05 22:38:57,844 INFO L226 Difference]: Without dead ends: 4258 [2021-06-05 22:38:57,845 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 701.0ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:38:57,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2021-06-05 22:38:57,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 3946. [2021-06-05 22:38:57,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 4.203295310519645) internal successors, (16582), 3945 states have internal predecessors, (16582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:57,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 16582 transitions. [2021-06-05 22:38:57,897 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 16582 transitions. Word has length 23 [2021-06-05 22:38:57,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:57,897 INFO L482 AbstractCegarLoop]: Abstraction has 3946 states and 16582 transitions. [2021-06-05 22:38:57,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:57,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 16582 transitions. [2021-06-05 22:38:57,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:57,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:57,902 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:58,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1002,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:58,103 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:58,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:58,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2009119637, now seen corresponding path program 306 times [2021-06-05 22:38:58,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:58,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506304680] [2021-06-05 22:38:58,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:58,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:58,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506304680] [2021-06-05 22:38:58,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506304680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:58,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345098395] [2021-06-05 22:38:58,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:58,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:38:58,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:58,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:58,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:58,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:58,330 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:38:58,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-05 22:38:58,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:58,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:58,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:58,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:53 [2021-06-05 22:38:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:58,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345098395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:58,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:58,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:38:58,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790863234] [2021-06-05 22:38:58,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:58,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:58,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:58,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:58,446 INFO L87 Difference]: Start difference. First operand 3946 states and 16582 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:59,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:59,116 INFO L93 Difference]: Finished difference Result 4260 states and 17781 transitions. [2021-06-05 22:38:59,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:38:59,116 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:38:59,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:59,124 INFO L225 Difference]: With dead ends: 4260 [2021-06-05 22:38:59,124 INFO L226 Difference]: Without dead ends: 4235 [2021-06-05 22:38:59,124 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 521.0ms TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:38:59,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-06-05 22:38:59,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 3950. [2021-06-05 22:38:59,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3950 states, 3949 states have (on average 4.203089389718916) internal successors, (16598), 3949 states have internal predecessors, (16598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:59,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3950 states to 3950 states and 16598 transitions. [2021-06-05 22:38:59,175 INFO L78 Accepts]: Start accepts. Automaton has 3950 states and 16598 transitions. Word has length 23 [2021-06-05 22:38:59,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:59,175 INFO L482 AbstractCegarLoop]: Abstraction has 3950 states and 16598 transitions. [2021-06-05 22:38:59,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:59,175 INFO L276 IsEmpty]: Start isEmpty. Operand 3950 states and 16598 transitions. [2021-06-05 22:38:59,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:38:59,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:59,180 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:59,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1004 [2021-06-05 22:38:59,380 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:59,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:59,381 INFO L82 PathProgramCache]: Analyzing trace with hash 996427105, now seen corresponding path program 307 times [2021-06-05 22:38:59,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:59,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319749698] [2021-06-05 22:38:59,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:59,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:59,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319749698] [2021-06-05 22:38:59,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319749698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:59,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268564127] [2021-06-05 22:38:59,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:59,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:38:59,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:59,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:59,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:38:59,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:59,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:59,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:59,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:38:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:59,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268564127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:59,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:59,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:38:59,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115082725] [2021-06-05 22:38:59,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:38:59,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:59,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:38:59,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:38:59,720 INFO L87 Difference]: Start difference. First operand 3950 states and 16598 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:00,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:00,416 INFO L93 Difference]: Finished difference Result 4278 states and 17852 transitions. [2021-06-05 22:39:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:39:00,417 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:00,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:00,424 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 22:39:00,424 INFO L226 Difference]: Without dead ends: 4257 [2021-06-05 22:39:00,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 622.7ms TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:39:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4257 states. [2021-06-05 22:39:00,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4257 to 3942. [2021-06-05 22:39:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 3941 states have (on average 4.203247906622685) internal successors, (16565), 3941 states have internal predecessors, (16565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:00,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 16565 transitions. [2021-06-05 22:39:00,477 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 16565 transitions. Word has length 23 [2021-06-05 22:39:00,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:00,478 INFO L482 AbstractCegarLoop]: Abstraction has 3942 states and 16565 transitions. [2021-06-05 22:39:00,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:00,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 16565 transitions. [2021-06-05 22:39:00,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:00,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:00,483 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:00,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1008 [2021-06-05 22:39:00,683 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:00,684 INFO L82 PathProgramCache]: Analyzing trace with hash 2145293225, now seen corresponding path program 308 times [2021-06-05 22:39:00,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:00,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358109684] [2021-06-05 22:39:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:00,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:00,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358109684] [2021-06-05 22:39:00,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358109684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:00,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986667858] [2021-06-05 22:39:00,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:00,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:00,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:00,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:00,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:00,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:00,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:39:00,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:00,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:00,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:00,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:39:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:00,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986667858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:00,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:00,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:00,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251257736] [2021-06-05 22:39:00,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:00,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:00,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:00,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:00,981 INFO L87 Difference]: Start difference. First operand 3942 states and 16565 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:01,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:01,436 INFO L93 Difference]: Finished difference Result 4391 states and 18288 transitions. [2021-06-05 22:39:01,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:39:01,436 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:01,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:01,444 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 22:39:01,445 INFO L226 Difference]: Without dead ends: 4356 [2021-06-05 22:39:01,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 361.2ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:39:01,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2021-06-05 22:39:01,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 3942. [2021-06-05 22:39:01,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 3941 states have (on average 4.202232935803096) internal successors, (16561), 3941 states have internal predecessors, (16561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:01,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 16561 transitions. [2021-06-05 22:39:01,499 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 16561 transitions. Word has length 23 [2021-06-05 22:39:01,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:01,499 INFO L482 AbstractCegarLoop]: Abstraction has 3942 states and 16561 transitions. [2021-06-05 22:39:01,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:01,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 16561 transitions. [2021-06-05 22:39:01,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:01,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:01,504 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:01,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:01,705 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:01,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:01,705 INFO L82 PathProgramCache]: Analyzing trace with hash -404390035, now seen corresponding path program 309 times [2021-06-05 22:39:01,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:01,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978878039] [2021-06-05 22:39:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:01,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:01,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978878039] [2021-06-05 22:39:01,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978878039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:01,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222177580] [2021-06-05 22:39:01,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:01,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:39:01,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:01,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:39:01,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:01,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:01,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:01,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:01,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2021-06-05 22:39:01,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:01,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:01,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:01,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:29 [2021-06-05 22:39:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:02,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222177580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:02,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:02,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:02,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133606232] [2021-06-05 22:39:02,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:02,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:02,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:02,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:02,019 INFO L87 Difference]: Start difference. First operand 3942 states and 16561 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:02,378 INFO L93 Difference]: Finished difference Result 4222 states and 17622 transitions. [2021-06-05 22:39:02,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:39:02,378 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:02,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:02,386 INFO L225 Difference]: With dead ends: 4222 [2021-06-05 22:39:02,386 INFO L226 Difference]: Without dead ends: 4196 [2021-06-05 22:39:02,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 315.4ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:02,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2021-06-05 22:39:02,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 3949. [2021-06-05 22:39:02,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3949 states, 3948 states have (on average 4.200861195542046) internal successors, (16585), 3948 states have internal predecessors, (16585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3949 states to 3949 states and 16585 transitions. [2021-06-05 22:39:02,438 INFO L78 Accepts]: Start accepts. Automaton has 3949 states and 16585 transitions. Word has length 23 [2021-06-05 22:39:02,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:02,438 INFO L482 AbstractCegarLoop]: Abstraction has 3949 states and 16585 transitions. [2021-06-05 22:39:02,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 3949 states and 16585 transitions. [2021-06-05 22:39:02,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:02,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:02,444 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:02,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1012 [2021-06-05 22:39:02,644 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:02,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:02,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1445966103, now seen corresponding path program 310 times [2021-06-05 22:39:02,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:02,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355792868] [2021-06-05 22:39:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:02,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:02,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355792868] [2021-06-05 22:39:02,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355792868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:02,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943636490] [2021-06-05 22:39:02,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:02,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:02,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:02,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:02,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:02,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:02,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:39:02,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:02,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:02,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:02,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:39:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:02,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943636490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:02,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:02,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:02,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919209913] [2021-06-05 22:39:02,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:02,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:02,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:02,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:02,948 INFO L87 Difference]: Start difference. First operand 3949 states and 16585 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:03,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:03,374 INFO L93 Difference]: Finished difference Result 4223 states and 17625 transitions. [2021-06-05 22:39:03,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:39:03,375 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:03,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:03,382 INFO L225 Difference]: With dead ends: 4223 [2021-06-05 22:39:03,382 INFO L226 Difference]: Without dead ends: 4191 [2021-06-05 22:39:03,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 350.3ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:03,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2021-06-05 22:39:03,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 3931. [2021-06-05 22:39:03,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3931 states, 3930 states have (on average 4.203053435114504) internal successors, (16518), 3930 states have internal predecessors, (16518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:03,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 16518 transitions. [2021-06-05 22:39:03,436 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 16518 transitions. Word has length 23 [2021-06-05 22:39:03,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:03,436 INFO L482 AbstractCegarLoop]: Abstraction has 3931 states and 16518 transitions. [2021-06-05 22:39:03,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:03,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 16518 transitions. [2021-06-05 22:39:03,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:03,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:03,442 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:03,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1013 [2021-06-05 22:39:03,642 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:03,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:03,642 INFO L82 PathProgramCache]: Analyzing trace with hash -389621131, now seen corresponding path program 311 times [2021-06-05 22:39:03,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:03,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882523782] [2021-06-05 22:39:03,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:03,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:03,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882523782] [2021-06-05 22:39:03,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882523782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:03,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797000593] [2021-06-05 22:39:03,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:03,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:39:03,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:03,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:03,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:03,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:03,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:39:03,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:03,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:03,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:03,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:39:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:03,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797000593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:03,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:03,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:03,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17281725] [2021-06-05 22:39:03,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:03,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:03,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:03,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:03,939 INFO L87 Difference]: Start difference. First operand 3931 states and 16518 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:04,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:04,481 INFO L93 Difference]: Finished difference Result 4495 states and 18698 transitions. [2021-06-05 22:39:04,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:39:04,481 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:04,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:04,490 INFO L225 Difference]: With dead ends: 4495 [2021-06-05 22:39:04,490 INFO L226 Difference]: Without dead ends: 4460 [2021-06-05 22:39:04,490 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 458.9ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:39:04,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2021-06-05 22:39:04,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3939. [2021-06-05 22:39:04,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3939 states, 3938 states have (on average 4.203148806500762) internal successors, (16552), 3938 states have internal predecessors, (16552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:04,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3939 states to 3939 states and 16552 transitions. [2021-06-05 22:39:04,561 INFO L78 Accepts]: Start accepts. Automaton has 3939 states and 16552 transitions. Word has length 23 [2021-06-05 22:39:04,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:04,561 INFO L482 AbstractCegarLoop]: Abstraction has 3939 states and 16552 transitions. [2021-06-05 22:39:04,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3939 states and 16552 transitions. [2021-06-05 22:39:04,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:04,567 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:04,568 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:04,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1015 [2021-06-05 22:39:04,768 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:04,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:04,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1194020355, now seen corresponding path program 312 times [2021-06-05 22:39:04,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:04,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645976566] [2021-06-05 22:39:04,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:04,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:04,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645976566] [2021-06-05 22:39:04,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645976566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:04,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941320569] [2021-06-05 22:39:04,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:04,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:39:04,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:04,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:04,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:05,029 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:39:05,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 22:39:05,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:05,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:05,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:05,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:38 [2021-06-05 22:39:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:05,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941320569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:05,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:05,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:39:05,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874190897] [2021-06-05 22:39:05,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:39:05,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:05,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:39:05,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:39:05,127 INFO L87 Difference]: Start difference. First operand 3939 states and 16552 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:05,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:05,790 INFO L93 Difference]: Finished difference Result 4392 states and 18301 transitions. [2021-06-05 22:39:05,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:39:05,790 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:05,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:05,798 INFO L225 Difference]: With dead ends: 4392 [2021-06-05 22:39:05,799 INFO L226 Difference]: Without dead ends: 4366 [2021-06-05 22:39:05,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 533.8ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:39:05,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4366 states. [2021-06-05 22:39:05,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4366 to 3943. [2021-06-05 22:39:05,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3943 states, 3942 states have (on average 4.202942668696093) internal successors, (16568), 3942 states have internal predecessors, (16568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:05,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3943 states to 3943 states and 16568 transitions. [2021-06-05 22:39:05,854 INFO L78 Accepts]: Start accepts. Automaton has 3943 states and 16568 transitions. Word has length 23 [2021-06-05 22:39:05,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:05,854 INFO L482 AbstractCegarLoop]: Abstraction has 3943 states and 16568 transitions. [2021-06-05 22:39:05,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:05,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3943 states and 16568 transitions. [2021-06-05 22:39:05,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:05,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:05,860 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:06,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1017,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:06,060 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:06,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:06,060 INFO L82 PathProgramCache]: Analyzing trace with hash 419546379, now seen corresponding path program 313 times [2021-06-05 22:39:06,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:06,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337813139] [2021-06-05 22:39:06,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:06,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:06,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337813139] [2021-06-05 22:39:06,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337813139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:06,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350431136] [2021-06-05 22:39:06,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:06,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:06,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:06,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:06,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:06,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:06,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:06,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:06,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:39:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:06,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350431136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:06,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:06,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:06,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137521454] [2021-06-05 22:39:06,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:06,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:06,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:06,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:06,360 INFO L87 Difference]: Start difference. First operand 3943 states and 16568 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:07,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:07,197 INFO L93 Difference]: Finished difference Result 4405 states and 18347 transitions. [2021-06-05 22:39:07,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:39:07,198 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:07,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:07,205 INFO L225 Difference]: With dead ends: 4405 [2021-06-05 22:39:07,205 INFO L226 Difference]: Without dead ends: 4384 [2021-06-05 22:39:07,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 711.8ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:39:07,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4384 states. [2021-06-05 22:39:07,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4384 to 3931. [2021-06-05 22:39:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3931 states, 3930 states have (on average 4.203053435114504) internal successors, (16518), 3930 states have internal predecessors, (16518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:07,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 16518 transitions. [2021-06-05 22:39:07,257 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 16518 transitions. Word has length 23 [2021-06-05 22:39:07,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:07,258 INFO L482 AbstractCegarLoop]: Abstraction has 3931 states and 16518 transitions. [2021-06-05 22:39:07,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:07,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 16518 transitions. [2021-06-05 22:39:07,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:07,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:07,263 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:07,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:07,464 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:07,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:07,464 INFO L82 PathProgramCache]: Analyzing trace with hash 510691453, now seen corresponding path program 314 times [2021-06-05 22:39:07,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:07,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794427598] [2021-06-05 22:39:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:07,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:07,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794427598] [2021-06-05 22:39:07,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794427598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:07,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823258238] [2021-06-05 22:39:07,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:07,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:07,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:07,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:07,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:07,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:07,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:07,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:07,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:07,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:07,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:39:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:07,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823258238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:07,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:07,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:07,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479860093] [2021-06-05 22:39:07,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:07,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:07,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:07,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:07,785 INFO L87 Difference]: Start difference. First operand 3931 states and 16518 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:08,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:08,218 INFO L93 Difference]: Finished difference Result 4178 states and 17449 transitions. [2021-06-05 22:39:08,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:39:08,219 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:08,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:08,226 INFO L225 Difference]: With dead ends: 4178 [2021-06-05 22:39:08,226 INFO L226 Difference]: Without dead ends: 4152 [2021-06-05 22:39:08,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 410.9ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4152 states. [2021-06-05 22:39:08,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4152 to 3938. [2021-06-05 22:39:08,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3937 states have (on average 4.201676403352807) internal successors, (16542), 3937 states have internal predecessors, (16542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:08,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 16542 transitions. [2021-06-05 22:39:08,277 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 16542 transitions. Word has length 23 [2021-06-05 22:39:08,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:08,277 INFO L482 AbstractCegarLoop]: Abstraction has 3938 states and 16542 transitions. [2021-06-05 22:39:08,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:08,277 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 16542 transitions. [2021-06-05 22:39:08,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:08,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:08,282 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:08,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1023,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:08,483 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:08,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:08,483 INFO L82 PathProgramCache]: Analyzing trace with hash -530884615, now seen corresponding path program 315 times [2021-06-05 22:39:08,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:08,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786114641] [2021-06-05 22:39:08,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:08,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:08,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:08,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786114641] [2021-06-05 22:39:08,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786114641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:08,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173534817] [2021-06-05 22:39:08,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:08,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:39:08,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:08,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:08,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:08,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:08,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:08,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:08,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:08,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:08,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:39:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:08,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173534817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:08,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:08,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:08,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101650433] [2021-06-05 22:39:08,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:08,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:08,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:08,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:08,796 INFO L87 Difference]: Start difference. First operand 3938 states and 16542 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:09,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:09,160 INFO L93 Difference]: Finished difference Result 4177 states and 17444 transitions. [2021-06-05 22:39:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:39:09,161 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:09,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:09,168 INFO L225 Difference]: With dead ends: 4177 [2021-06-05 22:39:09,168 INFO L226 Difference]: Without dead ends: 4149 [2021-06-05 22:39:09,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 357.3ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2021-06-05 22:39:09,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 3931. [2021-06-05 22:39:09,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3931 states, 3930 states have (on average 4.203053435114504) internal successors, (16518), 3930 states have internal predecessors, (16518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:09,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 16518 transitions. [2021-06-05 22:39:09,219 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 16518 transitions. Word has length 23 [2021-06-05 22:39:09,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:09,219 INFO L482 AbstractCegarLoop]: Abstraction has 3931 states and 16518 transitions. [2021-06-05 22:39:09,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:09,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 16518 transitions. [2021-06-05 22:39:09,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:09,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:09,224 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:09,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1025 [2021-06-05 22:39:09,425 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:09,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:09,425 INFO L82 PathProgramCache]: Analyzing trace with hash -818005967, now seen corresponding path program 316 times [2021-06-05 22:39:09,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:09,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15300024] [2021-06-05 22:39:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:09,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:09,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15300024] [2021-06-05 22:39:09,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15300024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:09,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480178422] [2021-06-05 22:39:09,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:09,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:09,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:09,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:09,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:09,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:09,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:09,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:09,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:09,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:09,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:39:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:09,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480178422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:09,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:09,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:09,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400316104] [2021-06-05 22:39:09,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:09,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:09,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:09,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:09,769 INFO L87 Difference]: Start difference. First operand 3931 states and 16518 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:10,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:10,263 INFO L93 Difference]: Finished difference Result 4222 states and 17622 transitions. [2021-06-05 22:39:10,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:39:10,264 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:10,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:10,271 INFO L225 Difference]: With dead ends: 4222 [2021-06-05 22:39:10,271 INFO L226 Difference]: Without dead ends: 4196 [2021-06-05 22:39:10,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 529.8ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:39:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2021-06-05 22:39:10,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 3935. [2021-06-05 22:39:10,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3935 states, 3934 states have (on average 4.202846975088968) internal successors, (16534), 3934 states have internal predecessors, (16534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:10,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3935 states to 3935 states and 16534 transitions. [2021-06-05 22:39:10,323 INFO L78 Accepts]: Start accepts. Automaton has 3935 states and 16534 transitions. Word has length 23 [2021-06-05 22:39:10,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:10,323 INFO L482 AbstractCegarLoop]: Abstraction has 3935 states and 16534 transitions. [2021-06-05 22:39:10,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:10,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3935 states and 16534 transitions. [2021-06-05 22:39:10,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:10,329 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:10,329 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:10,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1027 [2021-06-05 22:39:10,530 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:10,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:10,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1311223353, now seen corresponding path program 317 times [2021-06-05 22:39:10,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:10,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621748833] [2021-06-05 22:39:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:10,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:10,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621748833] [2021-06-05 22:39:10,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621748833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:10,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962134449] [2021-06-05 22:39:10,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:10,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:39:10,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:10,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:10,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:10,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:10,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:10,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:10,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:10,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:10,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:39:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:10,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962134449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:10,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:10,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:10,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878880183] [2021-06-05 22:39:10,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:10,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:10,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:10,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:10,848 INFO L87 Difference]: Start difference. First operand 3935 states and 16534 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:11,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:11,566 INFO L93 Difference]: Finished difference Result 4228 states and 17650 transitions. [2021-06-05 22:39:11,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:39:11,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:11,573 INFO L225 Difference]: With dead ends: 4228 [2021-06-05 22:39:11,574 INFO L226 Difference]: Without dead ends: 4207 [2021-06-05 22:39:11,574 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 709.2ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:39:11,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4207 states. [2021-06-05 22:39:11,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4207 to 3931. [2021-06-05 22:39:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3931 states, 3930 states have (on average 4.203053435114504) internal successors, (16518), 3930 states have internal predecessors, (16518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:11,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 16518 transitions. [2021-06-05 22:39:11,624 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 16518 transitions. Word has length 23 [2021-06-05 22:39:11,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:11,624 INFO L482 AbstractCegarLoop]: Abstraction has 3931 states and 16518 transitions. [2021-06-05 22:39:11,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:11,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 16518 transitions. [2021-06-05 22:39:11,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:11,629 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:11,629 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:11,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1029,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:11,830 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:11,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:11,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1389139629, now seen corresponding path program 318 times [2021-06-05 22:39:11,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:11,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108658562] [2021-06-05 22:39:11,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:11,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:11,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108658562] [2021-06-05 22:39:11,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108658562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:11,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846089098] [2021-06-05 22:39:11,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:11,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:39:11,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:11,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:11,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:12,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:12,057 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:39:12,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 22:39:12,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:12,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:12,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:12,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:49 [2021-06-05 22:39:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:12,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846089098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:12,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:12,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:39:12,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414063790] [2021-06-05 22:39:12,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:39:12,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:12,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:39:12,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:39:12,205 INFO L87 Difference]: Start difference. First operand 3931 states and 16518 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:12,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:12,967 INFO L93 Difference]: Finished difference Result 4289 states and 17885 transitions. [2021-06-05 22:39:12,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:39:12,968 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:12,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:12,975 INFO L225 Difference]: With dead ends: 4289 [2021-06-05 22:39:12,975 INFO L226 Difference]: Without dead ends: 4268 [2021-06-05 22:39:12,975 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 576.6ms TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:39:12,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2021-06-05 22:39:13,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 3929. [2021-06-05 22:39:13,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3929 states, 3928 states have (on average 4.20315682281059) internal successors, (16510), 3928 states have internal predecessors, (16510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 16510 transitions. [2021-06-05 22:39:13,026 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 16510 transitions. Word has length 23 [2021-06-05 22:39:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:13,026 INFO L482 AbstractCegarLoop]: Abstraction has 3929 states and 16510 transitions. [2021-06-05 22:39:13,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 16510 transitions. [2021-06-05 22:39:13,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:13,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:13,031 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:13,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1031,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:13,231 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:13,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:13,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1733706733, now seen corresponding path program 319 times [2021-06-05 22:39:13,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:13,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669189237] [2021-06-05 22:39:13,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:13,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:13,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669189237] [2021-06-05 22:39:13,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669189237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:13,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423588440] [2021-06-05 22:39:13,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:13,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:13,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:13,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:13,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:39:13,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:13,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:13,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:13,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:39:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:13,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423588440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:13,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:13,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:13,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440955053] [2021-06-05 22:39:13,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:13,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:13,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:13,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:13,513 INFO L87 Difference]: Start difference. First operand 3929 states and 16510 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:14,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:14,344 INFO L93 Difference]: Finished difference Result 4709 states and 19578 transitions. [2021-06-05 22:39:14,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:39:14,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:14,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:14,352 INFO L225 Difference]: With dead ends: 4709 [2021-06-05 22:39:14,353 INFO L226 Difference]: Without dead ends: 4687 [2021-06-05 22:39:14,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 588.3ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:39:14,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4687 states. [2021-06-05 22:39:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4687 to 3941. [2021-06-05 22:39:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3940 states have (on average 4.201522842639594) internal successors, (16554), 3940 states have internal predecessors, (16554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 16554 transitions. [2021-06-05 22:39:14,408 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 16554 transitions. Word has length 23 [2021-06-05 22:39:14,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:14,408 INFO L482 AbstractCegarLoop]: Abstraction has 3941 states and 16554 transitions. [2021-06-05 22:39:14,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:14,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 16554 transitions. [2021-06-05 22:39:14,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:14,414 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:14,414 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:14,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-06-05 22:39:14,614 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:14,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:14,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1148372781, now seen corresponding path program 320 times [2021-06-05 22:39:14,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:14,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496445404] [2021-06-05 22:39:14,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:14,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:14,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496445404] [2021-06-05 22:39:14,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496445404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:14,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601363247] [2021-06-05 22:39:14,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:14,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:14,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:14,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:14,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:14,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:14,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:14,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:14,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:14,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:14,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:39:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:14,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601363247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:14,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:14,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:14,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328113019] [2021-06-05 22:39:14,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:14,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:14,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:14,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:14,915 INFO L87 Difference]: Start difference. First operand 3941 states and 16554 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:15,588 INFO L93 Difference]: Finished difference Result 4573 states and 19006 transitions. [2021-06-05 22:39:15,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:39:15,588 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:15,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:15,596 INFO L225 Difference]: With dead ends: 4573 [2021-06-05 22:39:15,596 INFO L226 Difference]: Without dead ends: 4547 [2021-06-05 22:39:15,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:39:15,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4547 states. [2021-06-05 22:39:15,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4547 to 3945. [2021-06-05 22:39:15,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3944 states have (on average 4.20131845841785) internal successors, (16570), 3944 states have internal predecessors, (16570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:15,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 16570 transitions. [2021-06-05 22:39:15,649 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 16570 transitions. Word has length 23 [2021-06-05 22:39:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:15,649 INFO L482 AbstractCegarLoop]: Abstraction has 3945 states and 16570 transitions. [2021-06-05 22:39:15,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 16570 transitions. [2021-06-05 22:39:15,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:15,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:15,655 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:15,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1037,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:15,855 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:15,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:15,855 INFO L82 PathProgramCache]: Analyzing trace with hash 465193953, now seen corresponding path program 321 times [2021-06-05 22:39:15,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:15,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161195438] [2021-06-05 22:39:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:15,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:15,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161195438] [2021-06-05 22:39:15,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161195438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:15,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466697746] [2021-06-05 22:39:15,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:15,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:39:15,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:15,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:15,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:16,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:16,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:16,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:16,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:16,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:16,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:39:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:16,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466697746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:16,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:16,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:16,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182828939] [2021-06-05 22:39:16,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:16,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:16,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:16,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:16,148 INFO L87 Difference]: Start difference. First operand 3945 states and 16570 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:16,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:16,889 INFO L93 Difference]: Finished difference Result 4548 states and 18917 transitions. [2021-06-05 22:39:16,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:39:16,889 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:16,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:16,897 INFO L225 Difference]: With dead ends: 4548 [2021-06-05 22:39:16,897 INFO L226 Difference]: Without dead ends: 4527 [2021-06-05 22:39:16,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 671.3ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:39:16,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4527 states. [2021-06-05 22:39:16,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4527 to 3937. [2021-06-05 22:39:16,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3937 states, 3936 states have (on average 4.201219512195122) internal successors, (16536), 3936 states have internal predecessors, (16536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3937 states to 3937 states and 16536 transitions. [2021-06-05 22:39:16,950 INFO L78 Accepts]: Start accepts. Automaton has 3937 states and 16536 transitions. Word has length 23 [2021-06-05 22:39:16,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:16,950 INFO L482 AbstractCegarLoop]: Abstraction has 3937 states and 16536 transitions. [2021-06-05 22:39:16,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:16,950 INFO L276 IsEmpty]: Start isEmpty. Operand 3937 states and 16536 transitions. [2021-06-05 22:39:16,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:16,955 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:16,955 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:17,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1039 [2021-06-05 22:39:17,156 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:17,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:17,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1384209355, now seen corresponding path program 322 times [2021-06-05 22:39:17,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:17,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792705456] [2021-06-05 22:39:17,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:17,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:17,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792705456] [2021-06-05 22:39:17,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792705456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:17,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967261584] [2021-06-05 22:39:17,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:17,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:17,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:17,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:17,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:17,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:17,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:39:17,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:17,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:17,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:17,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:39:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:17,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967261584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:17,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:17,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:17,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733132974] [2021-06-05 22:39:17,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:17,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:17,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:17,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:17,460 INFO L87 Difference]: Start difference. First operand 3937 states and 16536 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:18,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:18,032 INFO L93 Difference]: Finished difference Result 4683 states and 19424 transitions. [2021-06-05 22:39:18,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:39:18,032 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:18,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:18,041 INFO L225 Difference]: With dead ends: 4683 [2021-06-05 22:39:18,041 INFO L226 Difference]: Without dead ends: 4648 [2021-06-05 22:39:18,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 454.0ms TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:39:18,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4648 states. [2021-06-05 22:39:18,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4648 to 3930. [2021-06-05 22:39:18,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3930 states, 3929 states have (on average 4.198014762025961) internal successors, (16494), 3929 states have internal predecessors, (16494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:18,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3930 states to 3930 states and 16494 transitions. [2021-06-05 22:39:18,096 INFO L78 Accepts]: Start accepts. Automaton has 3930 states and 16494 transitions. Word has length 23 [2021-06-05 22:39:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:18,096 INFO L482 AbstractCegarLoop]: Abstraction has 3930 states and 16494 transitions. [2021-06-05 22:39:18,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:18,096 INFO L276 IsEmpty]: Start isEmpty. Operand 3930 states and 16494 transitions. [2021-06-05 22:39:18,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:18,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:18,102 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:18,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:18,302 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:18,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:18,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1302810299, now seen corresponding path program 323 times [2021-06-05 22:39:18,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:18,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844024615] [2021-06-05 22:39:18,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:18,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:18,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844024615] [2021-06-05 22:39:18,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844024615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:18,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456092689] [2021-06-05 22:39:18,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:18,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:39:18,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:18,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:18,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:18,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:18,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:18,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:18,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:18,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:18,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:39:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:18,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456092689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:18,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:18,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:18,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420166878] [2021-06-05 22:39:18,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:18,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:18,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:18,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:18,599 INFO L87 Difference]: Start difference. First operand 3930 states and 16494 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:19,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:19,239 INFO L93 Difference]: Finished difference Result 4465 states and 18574 transitions. [2021-06-05 22:39:19,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:39:19,239 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:19,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:19,247 INFO L225 Difference]: With dead ends: 4465 [2021-06-05 22:39:19,247 INFO L226 Difference]: Without dead ends: 4439 [2021-06-05 22:39:19,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 519.4ms TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:39:19,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4439 states. [2021-06-05 22:39:19,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4439 to 3934. [2021-06-05 22:39:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3934 states, 3933 states have (on average 4.197813374014747) internal successors, (16510), 3933 states have internal predecessors, (16510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3934 states to 3934 states and 16510 transitions. [2021-06-05 22:39:19,300 INFO L78 Accepts]: Start accepts. Automaton has 3934 states and 16510 transitions. Word has length 23 [2021-06-05 22:39:19,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:19,300 INFO L482 AbstractCegarLoop]: Abstraction has 3934 states and 16510 transitions. [2021-06-05 22:39:19,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:19,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3934 states and 16510 transitions. [2021-06-05 22:39:19,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:19,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:19,305 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:19,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1043,478 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:19,505 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:19,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:19,506 INFO L82 PathProgramCache]: Analyzing trace with hash 310756435, now seen corresponding path program 324 times [2021-06-05 22:39:19,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:19,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016519668] [2021-06-05 22:39:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:19,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:19,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016519668] [2021-06-05 22:39:19,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016519668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:19,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406429543] [2021-06-05 22:39:19,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:19,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:39:19,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:19,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:19,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:19,737 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 22:39:19,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 68 [2021-06-05 22:39:19,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:19,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:19,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:19,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:48 [2021-06-05 22:39:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:19,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406429543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:19,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:19,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:39:19,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716449454] [2021-06-05 22:39:19,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:39:19,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:19,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:39:19,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:39:19,820 INFO L87 Difference]: Start difference. First operand 3934 states and 16510 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:20,702 INFO L93 Difference]: Finished difference Result 4414 states and 18376 transitions. [2021-06-05 22:39:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:39:20,703 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:20,730 INFO L225 Difference]: With dead ends: 4414 [2021-06-05 22:39:20,730 INFO L226 Difference]: Without dead ends: 4393 [2021-06-05 22:39:20,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 603.2ms TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:39:20,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4393 states. [2021-06-05 22:39:20,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4393 to 3914. [2021-06-05 22:39:20,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3913 states have (on average 4.196779964221824) internal successors, (16422), 3913 states have internal predecessors, (16422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 16422 transitions. [2021-06-05 22:39:20,779 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 16422 transitions. Word has length 23 [2021-06-05 22:39:20,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:20,779 INFO L482 AbstractCegarLoop]: Abstraction has 3914 states and 16422 transitions. [2021-06-05 22:39:20,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:20,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 16422 transitions. [2021-06-05 22:39:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:20,785 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:20,785 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:20,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1045 [2021-06-05 22:39:20,985 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:20,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:20,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1667247717, now seen corresponding path program 325 times [2021-06-05 22:39:20,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:20,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511026482] [2021-06-05 22:39:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:21,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:21,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511026482] [2021-06-05 22:39:21,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511026482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:21,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009883798] [2021-06-05 22:39:21,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:21,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:21,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:21,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:21,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:39:21,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:21,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:21,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:21,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:39:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:21,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009883798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:21,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:21,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:21,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234367597] [2021-06-05 22:39:21,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:21,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:21,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:21,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:21,271 INFO L87 Difference]: Start difference. First operand 3914 states and 16422 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:22,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:22,067 INFO L93 Difference]: Finished difference Result 4462 states and 18578 transitions. [2021-06-05 22:39:22,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:39:22,067 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:22,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:22,075 INFO L225 Difference]: With dead ends: 4462 [2021-06-05 22:39:22,075 INFO L226 Difference]: Without dead ends: 4440 [2021-06-05 22:39:22,075 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 515.6ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:39:22,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2021-06-05 22:39:22,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 3922. [2021-06-05 22:39:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.196888548839582) internal successors, (16456), 3921 states have internal predecessors, (16456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:22,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16456 transitions. [2021-06-05 22:39:22,129 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16456 transitions. Word has length 23 [2021-06-05 22:39:22,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:22,129 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16456 transitions. [2021-06-05 22:39:22,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:22,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16456 transitions. [2021-06-05 22:39:22,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:22,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:22,135 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:22,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1049 [2021-06-05 22:39:22,335 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:22,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:22,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1081913765, now seen corresponding path program 326 times [2021-06-05 22:39:22,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:22,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481132858] [2021-06-05 22:39:22,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:22,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:22,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481132858] [2021-06-05 22:39:22,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481132858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:22,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223908880] [2021-06-05 22:39:22,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:22,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:22,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:22,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:22,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:22,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:22,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:22,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:22,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:22,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:22,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:39:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:22,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223908880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:22,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:22,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:22,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143517675] [2021-06-05 22:39:22,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:22,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:22,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:22,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:22,639 INFO L87 Difference]: Start difference. First operand 3922 states and 16456 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:23,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:23,326 INFO L93 Difference]: Finished difference Result 4365 states and 18169 transitions. [2021-06-05 22:39:23,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:39:23,326 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:23,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:23,334 INFO L225 Difference]: With dead ends: 4365 [2021-06-05 22:39:23,334 INFO L226 Difference]: Without dead ends: 4339 [2021-06-05 22:39:23,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 566.1ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:39:23,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-06-05 22:39:23,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 3926. [2021-06-05 22:39:23,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3925 states have (on average 4.196687898089172) internal successors, (16472), 3925 states have internal predecessors, (16472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 16472 transitions. [2021-06-05 22:39:23,410 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 16472 transitions. Word has length 23 [2021-06-05 22:39:23,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:23,410 INFO L482 AbstractCegarLoop]: Abstraction has 3926 states and 16472 transitions. [2021-06-05 22:39:23,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:23,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 16472 transitions. [2021-06-05 22:39:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:23,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:23,415 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:23,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1051,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:23,615 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:23,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:23,616 INFO L82 PathProgramCache]: Analyzing trace with hash 531652969, now seen corresponding path program 327 times [2021-06-05 22:39:23,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:23,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349332731] [2021-06-05 22:39:23,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:23,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:23,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349332731] [2021-06-05 22:39:23,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349332731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:23,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960031658] [2021-06-05 22:39:23,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:23,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:39:23,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:23,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:23,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:23,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:23,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:23,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:23,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:23,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:23,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:39:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:23,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960031658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:23,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:23,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:23,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835630078] [2021-06-05 22:39:23,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:23,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:23,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:23,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:23,912 INFO L87 Difference]: Start difference. First operand 3926 states and 16472 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:24,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:24,773 INFO L93 Difference]: Finished difference Result 4337 states and 18068 transitions. [2021-06-05 22:39:24,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:39:24,773 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:24,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:24,782 INFO L225 Difference]: With dead ends: 4337 [2021-06-05 22:39:24,782 INFO L226 Difference]: Without dead ends: 4316 [2021-06-05 22:39:24,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 705.3ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:39:24,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4316 states. [2021-06-05 22:39:24,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4316 to 3918. [2021-06-05 22:39:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.196579014551953) internal successors, (16438), 3917 states have internal predecessors, (16438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:24,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16438 transitions. [2021-06-05 22:39:24,834 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16438 transitions. Word has length 23 [2021-06-05 22:39:24,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:24,835 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16438 transitions. [2021-06-05 22:39:24,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:24,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16438 transitions. [2021-06-05 22:39:24,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:24,840 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:24,840 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:25,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,482 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:25,040 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:25,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:25,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1512810199, now seen corresponding path program 328 times [2021-06-05 22:39:25,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:25,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585842790] [2021-06-05 22:39:25,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:25,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:25,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585842790] [2021-06-05 22:39:25,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585842790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:25,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936219795] [2021-06-05 22:39:25,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:25,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:25,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:25,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:25,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:25,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:25,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:39:25,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:25,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:25,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:25,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:39:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:25,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936219795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:25,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:25,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:25,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776929385] [2021-06-05 22:39:25,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:25,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:25,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:25,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:25,334 INFO L87 Difference]: Start difference. First operand 3918 states and 16438 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:25,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:25,907 INFO L93 Difference]: Finished difference Result 4358 states and 18168 transitions. [2021-06-05 22:39:25,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:39:25,907 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:25,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:25,915 INFO L225 Difference]: With dead ends: 4358 [2021-06-05 22:39:25,915 INFO L226 Difference]: Without dead ends: 4335 [2021-06-05 22:39:25,915 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 414.4ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:39:25,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-06-05 22:39:25,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 3918. [2021-06-05 22:39:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.196579014551953) internal successors, (16438), 3917 states have internal predecessors, (16438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16438 transitions. [2021-06-05 22:39:25,967 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16438 transitions. Word has length 23 [2021-06-05 22:39:25,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:25,968 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16438 transitions. [2021-06-05 22:39:25,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:25,968 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16438 transitions. [2021-06-05 22:39:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:25,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:25,973 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:26,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1055,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:26,173 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:26,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:26,173 INFO L82 PathProgramCache]: Analyzing trace with hash -48961385, now seen corresponding path program 329 times [2021-06-05 22:39:26,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:26,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028482979] [2021-06-05 22:39:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:26,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:26,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028482979] [2021-06-05 22:39:26,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028482979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:26,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480701115] [2021-06-05 22:39:26,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:26,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:39:26,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:26,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:26,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:26,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:26,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:39:26,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:26,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:26,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:26,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:39:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:26,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480701115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:26,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:26,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:26,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525052983] [2021-06-05 22:39:26,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:26,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:26,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:26,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:26,487 INFO L87 Difference]: Start difference. First operand 3918 states and 16438 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:27,093 INFO L93 Difference]: Finished difference Result 4355 states and 18155 transitions. [2021-06-05 22:39:27,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:39:27,093 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:27,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:27,101 INFO L225 Difference]: With dead ends: 4355 [2021-06-05 22:39:27,101 INFO L226 Difference]: Without dead ends: 4333 [2021-06-05 22:39:27,101 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 521.1ms TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:39:27,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-06-05 22:39:27,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3922. [2021-06-05 22:39:27,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.196888548839582) internal successors, (16456), 3921 states have internal predecessors, (16456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:27,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16456 transitions. [2021-06-05 22:39:27,154 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16456 transitions. Word has length 23 [2021-06-05 22:39:27,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:27,154 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16456 transitions. [2021-06-05 22:39:27,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:27,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16456 transitions. [2021-06-05 22:39:27,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:27,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:27,160 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:27,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1057 [2021-06-05 22:39:27,360 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:27,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:27,360 INFO L82 PathProgramCache]: Analyzing trace with hash 464565467, now seen corresponding path program 330 times [2021-06-05 22:39:27,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:27,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865135162] [2021-06-05 22:39:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:27,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:27,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865135162] [2021-06-05 22:39:27,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865135162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:27,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088632090] [2021-06-05 22:39:27,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:27,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:39:27,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:27,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:27,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:27,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:27,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:27,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:27,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:27,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:27,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:39:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:27,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088632090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:27,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:27,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:27,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494541115] [2021-06-05 22:39:27,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:27,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:27,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:27,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:27,653 INFO L87 Difference]: Start difference. First operand 3922 states and 16456 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:28,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:28,105 INFO L93 Difference]: Finished difference Result 4276 states and 17818 transitions. [2021-06-05 22:39:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:39:28,105 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:28,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:28,113 INFO L225 Difference]: With dead ends: 4276 [2021-06-05 22:39:28,113 INFO L226 Difference]: Without dead ends: 4251 [2021-06-05 22:39:28,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 397.2ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:39:28,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-05 22:39:28,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3926. [2021-06-05 22:39:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3925 states have (on average 4.196687898089172) internal successors, (16472), 3925 states have internal predecessors, (16472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:28,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 16472 transitions. [2021-06-05 22:39:28,165 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 16472 transitions. Word has length 23 [2021-06-05 22:39:28,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:28,165 INFO L482 AbstractCegarLoop]: Abstraction has 3926 states and 16472 transitions. [2021-06-05 22:39:28,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:28,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 16472 transitions. [2021-06-05 22:39:28,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:28,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:28,170 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:28,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1059,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:28,370 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:28,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:28,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1540276623, now seen corresponding path program 331 times [2021-06-05 22:39:28,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:28,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201124386] [2021-06-05 22:39:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:28,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:28,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201124386] [2021-06-05 22:39:28,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201124386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:28,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645689459] [2021-06-05 22:39:28,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:28,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:28,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:28,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:28,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:28,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:28,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:28,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:28,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:39:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:28,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645689459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:28,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:28,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:28,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221979465] [2021-06-05 22:39:28,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:28,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:28,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:28,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:28,664 INFO L87 Difference]: Start difference. First operand 3926 states and 16472 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:29,431 INFO L93 Difference]: Finished difference Result 4270 states and 17805 transitions. [2021-06-05 22:39:29,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:39:29,432 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:29,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:29,439 INFO L225 Difference]: With dead ends: 4270 [2021-06-05 22:39:29,439 INFO L226 Difference]: Without dead ends: 4249 [2021-06-05 22:39:29,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 678.7ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:39:29,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4249 states. [2021-06-05 22:39:29,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4249 to 3918. [2021-06-05 22:39:29,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.196579014551953) internal successors, (16438), 3917 states have internal predecessors, (16438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:29,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16438 transitions. [2021-06-05 22:39:29,490 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16438 transitions. Word has length 23 [2021-06-05 22:39:29,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:29,490 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16438 transitions. [2021-06-05 22:39:29,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:29,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16438 transitions. [2021-06-05 22:39:29,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:29,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:29,495 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:29,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1061,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:29,696 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:29,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:29,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1821272475, now seen corresponding path program 332 times [2021-06-05 22:39:29,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:29,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759755124] [2021-06-05 22:39:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:29,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:29,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759755124] [2021-06-05 22:39:29,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759755124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:29,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350084456] [2021-06-05 22:39:29,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:29,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:29,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:29,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:29,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:29,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:29,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:29,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:29,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:29,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:29,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:39:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:30,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350084456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:30,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:30,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:30,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813991315] [2021-06-05 22:39:30,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:30,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:30,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:30,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:30,012 INFO L87 Difference]: Start difference. First operand 3918 states and 16438 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:30,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:30,385 INFO L93 Difference]: Finished difference Result 4104 states and 17136 transitions. [2021-06-05 22:39:30,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:39:30,385 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:30,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:30,392 INFO L225 Difference]: With dead ends: 4104 [2021-06-05 22:39:30,392 INFO L226 Difference]: Without dead ends: 4078 [2021-06-05 22:39:30,392 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:30,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4078 states. [2021-06-05 22:39:30,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4078 to 3927. [2021-06-05 22:39:30,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3927 states, 3926 states have (on average 4.195109526235354) internal successors, (16470), 3926 states have internal predecessors, (16470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:30,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3927 states to 3927 states and 16470 transitions. [2021-06-05 22:39:30,443 INFO L78 Accepts]: Start accepts. Automaton has 3927 states and 16470 transitions. Word has length 23 [2021-06-05 22:39:30,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:30,443 INFO L482 AbstractCegarLoop]: Abstraction has 3927 states and 16470 transitions. [2021-06-05 22:39:30,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:30,443 INFO L276 IsEmpty]: Start isEmpty. Operand 3927 states and 16470 transitions. [2021-06-05 22:39:30,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:30,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:30,448 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:30,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:30,648 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:30,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:30,649 INFO L82 PathProgramCache]: Analyzing trace with hash 779696407, now seen corresponding path program 333 times [2021-06-05 22:39:30,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:30,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603762979] [2021-06-05 22:39:30,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:30,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:30,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603762979] [2021-06-05 22:39:30,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603762979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:30,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53504486] [2021-06-05 22:39:30,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:30,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:39:30,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:30,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:30,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:30,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:30,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:30,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:30,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:30,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:30,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:39:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:30,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53504486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:30,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:30,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:30,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479747087] [2021-06-05 22:39:30,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:30,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:30,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:30,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:30,961 INFO L87 Difference]: Start difference. First operand 3927 states and 16470 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:31,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:31,309 INFO L93 Difference]: Finished difference Result 4170 states and 17395 transitions. [2021-06-05 22:39:31,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:39:31,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:31,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:31,317 INFO L225 Difference]: With dead ends: 4170 [2021-06-05 22:39:31,317 INFO L226 Difference]: Without dead ends: 4142 [2021-06-05 22:39:31,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 356.5ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:31,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2021-06-05 22:39:31,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 3920. [2021-06-05 22:39:31,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.196478693544272) internal successors, (16446), 3919 states have internal predecessors, (16446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:31,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16446 transitions. [2021-06-05 22:39:31,368 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16446 transitions. Word has length 23 [2021-06-05 22:39:31,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:31,368 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16446 transitions. [2021-06-05 22:39:31,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:31,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16446 transitions. [2021-06-05 22:39:31,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:31,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:31,373 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:31,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:31,574 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:31,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:31,574 INFO L82 PathProgramCache]: Analyzing trace with hash 492575055, now seen corresponding path program 334 times [2021-06-05 22:39:31,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:31,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456084565] [2021-06-05 22:39:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:31,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:31,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456084565] [2021-06-05 22:39:31,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456084565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:31,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684950995] [2021-06-05 22:39:31,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:31,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:31,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:31,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:31,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:31,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:31,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:31,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:31,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:31,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:31,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:39:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:31,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684950995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:31,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:31,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:31,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748727555] [2021-06-05 22:39:31,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:31,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:31,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:31,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:31,916 INFO L87 Difference]: Start difference. First operand 3920 states and 16446 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:32,377 INFO L93 Difference]: Finished difference Result 4150 states and 17314 transitions. [2021-06-05 22:39:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:39:32,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:32,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:32,384 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 22:39:32,384 INFO L226 Difference]: Without dead ends: 4124 [2021-06-05 22:39:32,384 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 521.2ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:39:32,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4124 states. [2021-06-05 22:39:32,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4124 to 3924. [2021-06-05 22:39:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.1962783583991845) internal successors, (16462), 3923 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16462 transitions. [2021-06-05 22:39:32,433 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16462 transitions. Word has length 23 [2021-06-05 22:39:32,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:32,434 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16462 transitions. [2021-06-05 22:39:32,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:32,434 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16462 transitions. [2021-06-05 22:39:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:32,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:32,439 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:32,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1067 [2021-06-05 22:39:32,639 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:32,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:32,639 INFO L82 PathProgramCache]: Analyzing trace with hash -642331, now seen corresponding path program 335 times [2021-06-05 22:39:32,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:32,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823062625] [2021-06-05 22:39:32,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:32,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:32,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823062625] [2021-06-05 22:39:32,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823062625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:32,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427018474] [2021-06-05 22:39:32,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:32,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:39:32,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:32,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:32,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:32,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:32,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:32,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:32,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:32,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:32,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:39:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:32,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427018474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:32,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:32,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:32,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974604269] [2021-06-05 22:39:32,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:32,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:32,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:32,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:32,954 INFO L87 Difference]: Start difference. First operand 3924 states and 16462 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:33,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:33,578 INFO L93 Difference]: Finished difference Result 4180 states and 17445 transitions. [2021-06-05 22:39:33,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:39:33,578 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:33,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:33,585 INFO L225 Difference]: With dead ends: 4180 [2021-06-05 22:39:33,585 INFO L226 Difference]: Without dead ends: 4159 [2021-06-05 22:39:33,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 626.5ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:39:33,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2021-06-05 22:39:33,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 3920. [2021-06-05 22:39:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.196478693544272) internal successors, (16446), 3919 states have internal predecessors, (16446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:33,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16446 transitions. [2021-06-05 22:39:33,635 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16446 transitions. Word has length 23 [2021-06-05 22:39:33,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:33,635 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16446 transitions. [2021-06-05 22:39:33,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16446 transitions. [2021-06-05 22:39:33,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:33,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:33,640 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:33,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1069 [2021-06-05 22:39:33,841 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:33,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:33,841 INFO L82 PathProgramCache]: Analyzing trace with hash 934133925, now seen corresponding path program 336 times [2021-06-05 22:39:33,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:33,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104189141] [2021-06-05 22:39:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:33,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:33,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104189141] [2021-06-05 22:39:33,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104189141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:33,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511515062] [2021-06-05 22:39:33,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:33,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:39:33,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:33,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:33,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:34,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:34,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:34,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:34,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:34,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:34,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:39:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:34,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511515062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:34,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:34,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:34,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815236939] [2021-06-05 22:39:34,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:34,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:34,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:34,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:34,149 INFO L87 Difference]: Start difference. First operand 3920 states and 16446 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:34,496 INFO L93 Difference]: Finished difference Result 4191 states and 17481 transitions. [2021-06-05 22:39:34,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:39:34,497 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:34,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:34,504 INFO L225 Difference]: With dead ends: 4191 [2021-06-05 22:39:34,505 INFO L226 Difference]: Without dead ends: 4166 [2021-06-05 22:39:34,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 351.7ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:34,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-06-05 22:39:34,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 3924. [2021-06-05 22:39:34,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.1962783583991845) internal successors, (16462), 3923 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16462 transitions. [2021-06-05 22:39:34,558 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16462 transitions. Word has length 23 [2021-06-05 22:39:34,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:34,558 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16462 transitions. [2021-06-05 22:39:34,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:34,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16462 transitions. [2021-06-05 22:39:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:34,564 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:34,564 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:34,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:34,764 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:34,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:34,764 INFO L82 PathProgramCache]: Analyzing trace with hash -78558607, now seen corresponding path program 337 times [2021-06-05 22:39:34,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:34,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705081127] [2021-06-05 22:39:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:34,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:34,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705081127] [2021-06-05 22:39:34,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705081127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:34,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394203463] [2021-06-05 22:39:34,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:34,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:34,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:34,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:34,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:34,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:34,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:34,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:34,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:39:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:35,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394203463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:35,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:35,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:35,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712615041] [2021-06-05 22:39:35,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:35,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:35,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:35,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:35,074 INFO L87 Difference]: Start difference. First operand 3924 states and 16462 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:35,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:35,631 INFO L93 Difference]: Finished difference Result 4183 states and 17457 transitions. [2021-06-05 22:39:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:39:35,631 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:35,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:35,638 INFO L225 Difference]: With dead ends: 4183 [2021-06-05 22:39:35,638 INFO L226 Difference]: Without dead ends: 4162 [2021-06-05 22:39:35,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 551.3ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:39:35,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4162 states. [2021-06-05 22:39:35,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4162 to 3916. [2021-06-05 22:39:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196424010217114) internal successors, (16429), 3915 states have internal predecessors, (16429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16429 transitions. [2021-06-05 22:39:35,690 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16429 transitions. Word has length 23 [2021-06-05 22:39:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:35,690 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16429 transitions. [2021-06-05 22:39:35,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16429 transitions. [2021-06-05 22:39:35,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:35,696 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:35,696 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:35,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1073,492 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:35,896 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:35,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:35,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1664788197, now seen corresponding path program 338 times [2021-06-05 22:39:35,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:35,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36568020] [2021-06-05 22:39:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:35,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:35,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36568020] [2021-06-05 22:39:35,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36568020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:35,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736430821] [2021-06-05 22:39:35,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:36,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:36,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:36,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:36,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:36,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:36,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:39:36,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:36,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:36,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:36,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:39:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:36,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736430821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:36,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:36,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:36,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854170775] [2021-06-05 22:39:36,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:36,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:36,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:36,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:36,197 INFO L87 Difference]: Start difference. First operand 3916 states and 16429 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:36,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:36,641 INFO L93 Difference]: Finished difference Result 4223 states and 17632 transitions. [2021-06-05 22:39:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:39:36,641 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:36,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:36,652 INFO L225 Difference]: With dead ends: 4223 [2021-06-05 22:39:36,652 INFO L226 Difference]: Without dead ends: 4200 [2021-06-05 22:39:36,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 399.6ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:39:36,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2021-06-05 22:39:36,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 3912. [2021-06-05 22:39:36,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3911 states have (on average 4.196624904116594) internal successors, (16413), 3911 states have internal predecessors, (16413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:36,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 16413 transitions. [2021-06-05 22:39:36,704 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 16413 transitions. Word has length 23 [2021-06-05 22:39:36,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:36,704 INFO L482 AbstractCegarLoop]: Abstraction has 3912 states and 16413 transitions. [2021-06-05 22:39:36,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:36,704 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 16413 transitions. [2021-06-05 22:39:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:36,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:36,710 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:36,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1075,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:36,910 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:36,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:36,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1958361947, now seen corresponding path program 339 times [2021-06-05 22:39:36,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:36,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870389517] [2021-06-05 22:39:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:36,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:36,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870389517] [2021-06-05 22:39:36,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870389517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:36,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211703441] [2021-06-05 22:39:36,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:37,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:39:37,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:37,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:37,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:37,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:37,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:39:37,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:37,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:37,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:37,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:39:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:37,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211703441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:37,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:37,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:37,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525667811] [2021-06-05 22:39:37,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:37,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:37,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:37,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:37,219 INFO L87 Difference]: Start difference. First operand 3912 states and 16413 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:37,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:37,997 INFO L93 Difference]: Finished difference Result 4355 states and 18155 transitions. [2021-06-05 22:39:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:39:37,997 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:38,005 INFO L225 Difference]: With dead ends: 4355 [2021-06-05 22:39:38,005 INFO L226 Difference]: Without dead ends: 4333 [2021-06-05 22:39:38,005 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 571.2ms TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:39:38,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-06-05 22:39:38,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3920. [2021-06-05 22:39:38,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.196733860678744) internal successors, (16447), 3919 states have internal predecessors, (16447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:38,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16447 transitions. [2021-06-05 22:39:38,057 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16447 transitions. Word has length 23 [2021-06-05 22:39:38,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:38,057 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16447 transitions. [2021-06-05 22:39:38,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:38,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16447 transitions. [2021-06-05 22:39:38,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:38,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:38,062 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:38,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2021-06-05 22:39:38,262 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:38,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:38,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1444835095, now seen corresponding path program 340 times [2021-06-05 22:39:38,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:38,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700905165] [2021-06-05 22:39:38,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:38,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:38,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700905165] [2021-06-05 22:39:38,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700905165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:38,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913343627] [2021-06-05 22:39:38,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:38,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:38,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:38,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:38,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:38,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:38,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:38,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:38,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:38,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:38,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:39:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:38,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913343627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:38,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:38,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:38,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786341370] [2021-06-05 22:39:38,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:38,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:38,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:38,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:38,554 INFO L87 Difference]: Start difference. First operand 3920 states and 16447 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:38,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:38,989 INFO L93 Difference]: Finished difference Result 4356 states and 18132 transitions. [2021-06-05 22:39:38,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:39:38,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:38,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:38,998 INFO L225 Difference]: With dead ends: 4356 [2021-06-05 22:39:38,998 INFO L226 Difference]: Without dead ends: 4331 [2021-06-05 22:39:38,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 398.3ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:39:39,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2021-06-05 22:39:39,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 3924. [2021-06-05 22:39:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.196533265358144) internal successors, (16463), 3923 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:39,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16463 transitions. [2021-06-05 22:39:39,050 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16463 transitions. Word has length 23 [2021-06-05 22:39:39,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:39,050 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16463 transitions. [2021-06-05 22:39:39,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:39,051 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16463 transitions. [2021-06-05 22:39:39,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:39,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:39,056 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:39,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-06-05 22:39:39,256 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:39,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:39,256 INFO L82 PathProgramCache]: Analyzing trace with hash -369123939, now seen corresponding path program 341 times [2021-06-05 22:39:39,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:39,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248156604] [2021-06-05 22:39:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:39,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:39,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248156604] [2021-06-05 22:39:39,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248156604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:39,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324470275] [2021-06-05 22:39:39,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:39,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:39:39,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:39,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:39,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:39,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:39,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:39,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:39,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:39,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:39,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:39:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:39,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324470275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:39,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:39,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:39,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171153283] [2021-06-05 22:39:39,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:39,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:39,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:39,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:39,550 INFO L87 Difference]: Start difference. First operand 3924 states and 16463 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:40,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:40,508 INFO L93 Difference]: Finished difference Result 4295 states and 17905 transitions. [2021-06-05 22:39:40,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:39:40,508 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:40,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:40,516 INFO L225 Difference]: With dead ends: 4295 [2021-06-05 22:39:40,516 INFO L226 Difference]: Without dead ends: 4274 [2021-06-05 22:39:40,516 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 807.5ms TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:39:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4274 states. [2021-06-05 22:39:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4274 to 3916. [2021-06-05 22:39:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196424010217114) internal successors, (16429), 3915 states have internal predecessors, (16429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:40,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16429 transitions. [2021-06-05 22:39:40,566 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16429 transitions. Word has length 23 [2021-06-05 22:39:40,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:40,566 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16429 transitions. [2021-06-05 22:39:40,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:40,566 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16429 transitions. [2021-06-05 22:39:40,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:40,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:40,571 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:40,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1081,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:40,771 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:40,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:40,772 INFO L82 PathProgramCache]: Analyzing trace with hash -198309007, now seen corresponding path program 342 times [2021-06-05 22:39:40,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:40,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349384598] [2021-06-05 22:39:40,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:40,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:40,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349384598] [2021-06-05 22:39:40,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349384598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:40,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559870614] [2021-06-05 22:39:40,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:40,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:39:40,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:40,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:40,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:40,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:40,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:39:40,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:40,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:41,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:41,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:39:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:41,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559870614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:41,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:41,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:41,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189582578] [2021-06-05 22:39:41,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:41,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:41,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:41,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:41,061 INFO L87 Difference]: Start difference. First operand 3916 states and 16429 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:41,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:41,517 INFO L93 Difference]: Finished difference Result 4209 states and 17576 transitions. [2021-06-05 22:39:41,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:39:41,517 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:41,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:41,525 INFO L225 Difference]: With dead ends: 4209 [2021-06-05 22:39:41,525 INFO L226 Difference]: Without dead ends: 4186 [2021-06-05 22:39:41,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 401.7ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:39:41,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2021-06-05 22:39:41,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 3912. [2021-06-05 22:39:41,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3911 states have (on average 4.196624904116594) internal successors, (16413), 3911 states have internal predecessors, (16413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:41,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 16413 transitions. [2021-06-05 22:39:41,577 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 16413 transitions. Word has length 23 [2021-06-05 22:39:41,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:41,577 INFO L482 AbstractCegarLoop]: Abstraction has 3912 states and 16413 transitions. [2021-06-05 22:39:41,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:41,577 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 16413 transitions. [2021-06-05 22:39:41,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:41,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:41,582 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:41,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1083 [2021-06-05 22:39:41,782 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:41,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:41,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1238319051, now seen corresponding path program 343 times [2021-06-05 22:39:41,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:41,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413895233] [2021-06-05 22:39:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:41,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:41,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413895233] [2021-06-05 22:39:41,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413895233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:41,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545740810] [2021-06-05 22:39:41,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:41,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:41,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:41,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:41,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:39:42,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:42,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:42,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:42,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:39:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:42,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545740810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:42,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:42,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:42,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287071219] [2021-06-05 22:39:42,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:42,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:42,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:42,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:42,072 INFO L87 Difference]: Start difference. First operand 3912 states and 16413 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:42,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:42,859 INFO L93 Difference]: Finished difference Result 4354 states and 18146 transitions. [2021-06-05 22:39:42,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:39:42,860 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:42,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:42,867 INFO L225 Difference]: With dead ends: 4354 [2021-06-05 22:39:42,867 INFO L226 Difference]: Without dead ends: 4332 [2021-06-05 22:39:42,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 590.6ms TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:39:42,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2021-06-05 22:39:42,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 3918. [2021-06-05 22:39:42,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.197089609394945) internal successors, (16440), 3917 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:42,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16440 transitions. [2021-06-05 22:39:42,918 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16440 transitions. Word has length 23 [2021-06-05 22:39:42,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:42,919 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16440 transitions. [2021-06-05 22:39:42,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:42,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16440 transitions. [2021-06-05 22:39:42,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:42,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:42,924 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:43,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:43,124 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:43,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:43,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1823653003, now seen corresponding path program 344 times [2021-06-05 22:39:43,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:43,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064029582] [2021-06-05 22:39:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:43,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:43,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064029582] [2021-06-05 22:39:43,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064029582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:43,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816329658] [2021-06-05 22:39:43,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:43,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:43,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:43,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:43,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:43,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:43,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:43,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:43,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:43,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:43,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:39:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:43,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816329658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:43,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:43,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:43,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740867112] [2021-06-05 22:39:43,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:43,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:43,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:43,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:43,417 INFO L87 Difference]: Start difference. First operand 3918 states and 16440 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:43,840 INFO L93 Difference]: Finished difference Result 4269 states and 17784 transitions. [2021-06-05 22:39:43,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:39:43,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:43,849 INFO L225 Difference]: With dead ends: 4269 [2021-06-05 22:39:43,849 INFO L226 Difference]: Without dead ends: 4243 [2021-06-05 22:39:43,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 400.0ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:39:43,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2021-06-05 22:39:43,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 3922. [2021-06-05 22:39:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.196888548839582) internal successors, (16456), 3921 states have internal predecessors, (16456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:43,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16456 transitions. [2021-06-05 22:39:43,903 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16456 transitions. Word has length 23 [2021-06-05 22:39:43,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:43,903 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16456 transitions. [2021-06-05 22:39:43,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:43,903 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16456 transitions. [2021-06-05 22:39:43,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:43,908 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:43,908 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:44,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1087,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:44,109 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:44,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:44,109 INFO L82 PathProgramCache]: Analyzing trace with hash -857747559, now seen corresponding path program 345 times [2021-06-05 22:39:44,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:44,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089579439] [2021-06-05 22:39:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:44,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:44,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089579439] [2021-06-05 22:39:44,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089579439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:44,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778382262] [2021-06-05 22:39:44,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:44,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:39:44,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:44,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:44,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:44,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:44,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:44,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:44,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:44,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:44,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:39:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:44,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778382262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:44,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:44,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:44,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841513267] [2021-06-05 22:39:44,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:44,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:44,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:44,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:44,411 INFO L87 Difference]: Start difference. First operand 3922 states and 16456 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:45,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:45,266 INFO L93 Difference]: Finished difference Result 4276 states and 17820 transitions. [2021-06-05 22:39:45,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:39:45,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:45,274 INFO L225 Difference]: With dead ends: 4276 [2021-06-05 22:39:45,274 INFO L226 Difference]: Without dead ends: 4255 [2021-06-05 22:39:45,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 735.6ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:39:45,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4255 states. [2021-06-05 22:39:45,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4255 to 3914. [2021-06-05 22:39:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3913 states have (on average 4.196779964221824) internal successors, (16422), 3913 states have internal predecessors, (16422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:45,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 16422 transitions. [2021-06-05 22:39:45,346 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 16422 transitions. Word has length 23 [2021-06-05 22:39:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:45,346 INFO L482 AbstractCegarLoop]: Abstraction has 3914 states and 16422 transitions. [2021-06-05 22:39:45,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:45,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 16422 transitions. [2021-06-05 22:39:45,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:45,351 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:45,351 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:45,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1089 [2021-06-05 22:39:45,552 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:45,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:45,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1011097671, now seen corresponding path program 346 times [2021-06-05 22:39:45,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:45,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909292030] [2021-06-05 22:39:45,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:45,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:45,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909292030] [2021-06-05 22:39:45,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909292030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:45,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995436025] [2021-06-05 22:39:45,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:45,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:45,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:45,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:45,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:45,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:45,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:39:45,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:45,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:45,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:45,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:39:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:45,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995436025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:45,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:45,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:45,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944141969] [2021-06-05 22:39:45,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:45,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:45,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:45,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:45,843 INFO L87 Difference]: Start difference. First operand 3914 states and 16422 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:46,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:46,609 INFO L93 Difference]: Finished difference Result 4385 states and 18270 transitions. [2021-06-05 22:39:46,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:39:46,609 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:46,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:46,617 INFO L225 Difference]: With dead ends: 4385 [2021-06-05 22:39:46,617 INFO L226 Difference]: Without dead ends: 4363 [2021-06-05 22:39:46,617 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 566.5ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:39:46,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-06-05 22:39:46,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3922. [2021-06-05 22:39:46,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.197143585819944) internal successors, (16457), 3921 states have internal predecessors, (16457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:46,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16457 transitions. [2021-06-05 22:39:46,672 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16457 transitions. Word has length 23 [2021-06-05 22:39:46,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:46,672 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16457 transitions. [2021-06-05 22:39:46,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:46,672 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16457 transitions. [2021-06-05 22:39:46,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:46,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:46,678 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:46,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1091,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:46,878 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:46,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:46,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1524624523, now seen corresponding path program 347 times [2021-06-05 22:39:46,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:46,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330278799] [2021-06-05 22:39:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:46,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:46,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330278799] [2021-06-05 22:39:46,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330278799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:46,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395216343] [2021-06-05 22:39:46,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:47,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:39:47,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:47,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:47,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:47,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:47,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:47,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:47,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:47,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:47,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:39:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:47,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395216343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:47,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:47,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:47,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881068778] [2021-06-05 22:39:47,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:47,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:47,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:47,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:47,183 INFO L87 Difference]: Start difference. First operand 3922 states and 16457 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:47,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:47,775 INFO L93 Difference]: Finished difference Result 4297 states and 17896 transitions. [2021-06-05 22:39:47,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:39:47,775 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:47,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:47,783 INFO L225 Difference]: With dead ends: 4297 [2021-06-05 22:39:47,783 INFO L226 Difference]: Without dead ends: 4272 [2021-06-05 22:39:47,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 564.3ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:39:47,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4272 states. [2021-06-05 22:39:47,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4272 to 3926. [2021-06-05 22:39:47,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3925 states have (on average 4.196942675159236) internal successors, (16473), 3925 states have internal predecessors, (16473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 16473 transitions. [2021-06-05 22:39:47,841 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 16473 transitions. Word has length 23 [2021-06-05 22:39:47,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:47,841 INFO L482 AbstractCegarLoop]: Abstraction has 3926 states and 16473 transitions. [2021-06-05 22:39:47,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 16473 transitions. [2021-06-05 22:39:47,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:47,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:47,846 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:48,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1093 [2021-06-05 22:39:48,047 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:48,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:48,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1694631617, now seen corresponding path program 348 times [2021-06-05 22:39:48,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:48,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424263950] [2021-06-05 22:39:48,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:48,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:48,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424263950] [2021-06-05 22:39:48,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424263950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:48,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987929749] [2021-06-05 22:39:48,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:48,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:39:48,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:48,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:48,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:48,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:48,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:48,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:48,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:48,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:48,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:39:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:48,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987929749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:48,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:48,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:48,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273213994] [2021-06-05 22:39:48,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:48,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:48,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:48,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:48,373 INFO L87 Difference]: Start difference. First operand 3926 states and 16473 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:49,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:49,284 INFO L93 Difference]: Finished difference Result 4307 states and 17947 transitions. [2021-06-05 22:39:49,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:39:49,285 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:49,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:49,292 INFO L225 Difference]: With dead ends: 4307 [2021-06-05 22:39:49,292 INFO L226 Difference]: Without dead ends: 4286 [2021-06-05 22:39:49,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 756.5ms TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:39:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2021-06-05 22:39:49,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 3918. [2021-06-05 22:39:49,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.196834311973449) internal successors, (16439), 3917 states have internal predecessors, (16439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:49,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16439 transitions. [2021-06-05 22:39:49,343 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16439 transitions. Word has length 23 [2021-06-05 22:39:49,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:49,343 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16439 transitions. [2021-06-05 22:39:49,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:49,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16439 transitions. [2021-06-05 22:39:49,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:49,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:49,348 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:49,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1095,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:49,549 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:49,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:49,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1413635765, now seen corresponding path program 349 times [2021-06-05 22:39:49,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:49,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269725178] [2021-06-05 22:39:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:49,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:49,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269725178] [2021-06-05 22:39:49,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269725178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:49,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866206556] [2021-06-05 22:39:49,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:49,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:49,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:49,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:49,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:49,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:49,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:49,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:49,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:39:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:49,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866206556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:49,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:49,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:49,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426660034] [2021-06-05 22:39:49,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:49,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:49,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:49,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:49,861 INFO L87 Difference]: Start difference. First operand 3918 states and 16439 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:50,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:50,271 INFO L93 Difference]: Finished difference Result 4176 states and 17415 transitions. [2021-06-05 22:39:50,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:39:50,272 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:50,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:50,279 INFO L225 Difference]: With dead ends: 4176 [2021-06-05 22:39:50,279 INFO L226 Difference]: Without dead ends: 4150 [2021-06-05 22:39:50,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:50,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2021-06-05 22:39:50,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 3927. [2021-06-05 22:39:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3927 states, 3926 states have (on average 4.195364238410596) internal successors, (16471), 3926 states have internal predecessors, (16471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:50,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3927 states to 3927 states and 16471 transitions. [2021-06-05 22:39:50,330 INFO L78 Accepts]: Start accepts. Automaton has 3927 states and 16471 transitions. Word has length 23 [2021-06-05 22:39:50,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:50,330 INFO L482 AbstractCegarLoop]: Abstraction has 3927 states and 16471 transitions. [2021-06-05 22:39:50,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:50,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3927 states and 16471 transitions. [2021-06-05 22:39:50,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:50,336 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:50,336 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:50,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1097,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:50,536 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:50,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:50,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1839755463, now seen corresponding path program 350 times [2021-06-05 22:39:50,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:50,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104063732] [2021-06-05 22:39:50,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:50,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:50,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104063732] [2021-06-05 22:39:50,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104063732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:50,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674124963] [2021-06-05 22:39:50,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:50,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:50,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:50,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:50,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:50,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:50,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:50,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:50,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:50,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:50,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:39:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:50,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674124963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:50,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:50,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:50,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716656847] [2021-06-05 22:39:50,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:50,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:50,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:50,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:50,881 INFO L87 Difference]: Start difference. First operand 3927 states and 16471 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:51,290 INFO L93 Difference]: Finished difference Result 4175 states and 17410 transitions. [2021-06-05 22:39:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:39:51,291 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:51,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:51,298 INFO L225 Difference]: With dead ends: 4175 [2021-06-05 22:39:51,298 INFO L226 Difference]: Without dead ends: 4147 [2021-06-05 22:39:51,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 396.7ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2021-06-05 22:39:51,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 3920. [2021-06-05 22:39:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.196733860678744) internal successors, (16447), 3919 states have internal predecessors, (16447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16447 transitions. [2021-06-05 22:39:51,347 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16447 transitions. Word has length 23 [2021-06-05 22:39:51,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:51,348 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16447 transitions. [2021-06-05 22:39:51,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:51,348 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16447 transitions. [2021-06-05 22:39:51,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:51,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:51,353 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:51,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1099 [2021-06-05 22:39:51,553 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:51,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:51,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1552634111, now seen corresponding path program 351 times [2021-06-05 22:39:51,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:51,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619632670] [2021-06-05 22:39:51,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:51,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:51,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619632670] [2021-06-05 22:39:51,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619632670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:51,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495499325] [2021-06-05 22:39:51,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:51,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:39:51,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:51,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:39:51,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:51,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:51,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:39:51,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:51,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:51,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:51,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:39:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:51,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495499325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:51,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:51,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:51,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388655805] [2021-06-05 22:39:51,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:51,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:51,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:51,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:51,845 INFO L87 Difference]: Start difference. First operand 3920 states and 16447 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:52,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:52,162 INFO L93 Difference]: Finished difference Result 4195 states and 17490 transitions. [2021-06-05 22:39:52,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:39:52,162 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:52,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:52,170 INFO L225 Difference]: With dead ends: 4195 [2021-06-05 22:39:52,170 INFO L226 Difference]: Without dead ends: 4169 [2021-06-05 22:39:52,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 287.0ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:52,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2021-06-05 22:39:52,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 3924. [2021-06-05 22:39:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.196533265358144) internal successors, (16463), 3923 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16463 transitions. [2021-06-05 22:39:52,222 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16463 transitions. Word has length 23 [2021-06-05 22:39:52,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:52,222 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16463 transitions. [2021-06-05 22:39:52,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:52,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16463 transitions. [2021-06-05 22:39:52,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:52,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:52,227 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:52,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1101 [2021-06-05 22:39:52,428 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:52,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:52,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1059416725, now seen corresponding path program 352 times [2021-06-05 22:39:52,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:52,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573121479] [2021-06-05 22:39:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:52,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:52,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573121479] [2021-06-05 22:39:52,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573121479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:52,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373861864] [2021-06-05 22:39:52,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:52,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:52,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:52,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:52,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:52,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:52,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:52,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:52,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:52,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:52,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:39:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:52,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373861864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:52,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:52,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:52,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885732904] [2021-06-05 22:39:52,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:52,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:52,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:52,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:52,745 INFO L87 Difference]: Start difference. First operand 3924 states and 16463 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:53,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:53,381 INFO L93 Difference]: Finished difference Result 4209 states and 17554 transitions. [2021-06-05 22:39:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:39:53,381 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:53,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:53,388 INFO L225 Difference]: With dead ends: 4209 [2021-06-05 22:39:53,389 INFO L226 Difference]: Without dead ends: 4188 [2021-06-05 22:39:53,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 619.1ms TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:39:53,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-06-05 22:39:53,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3920. [2021-06-05 22:39:53,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.196733860678744) internal successors, (16447), 3919 states have internal predecessors, (16447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:53,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16447 transitions. [2021-06-05 22:39:53,462 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16447 transitions. Word has length 23 [2021-06-05 22:39:53,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:53,462 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16447 transitions. [2021-06-05 22:39:53,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:53,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16447 transitions. [2021-06-05 22:39:53,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:53,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:53,467 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:53,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1102 [2021-06-05 22:39:53,668 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:53,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:53,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1994192981, now seen corresponding path program 353 times [2021-06-05 22:39:53,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:53,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676115477] [2021-06-05 22:39:53,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:53,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:53,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676115477] [2021-06-05 22:39:53,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676115477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:53,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814015547] [2021-06-05 22:39:53,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:53,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:39:53,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:53,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:53,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:53,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:53,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:53,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:53,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:53,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:53,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:39:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:53,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814015547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:53,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:53,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:53,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52921828] [2021-06-05 22:39:53,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:53,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:53,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:53,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:53,991 INFO L87 Difference]: Start difference. First operand 3920 states and 16447 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:54,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:54,481 INFO L93 Difference]: Finished difference Result 4246 states and 17695 transitions. [2021-06-05 22:39:54,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:39:54,482 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:54,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:54,489 INFO L225 Difference]: With dead ends: 4246 [2021-06-05 22:39:54,489 INFO L226 Difference]: Without dead ends: 4221 [2021-06-05 22:39:54,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 506.7ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:39:54,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2021-06-05 22:39:54,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 3924. [2021-06-05 22:39:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.196533265358144) internal successors, (16463), 3923 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:54,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16463 transitions. [2021-06-05 22:39:54,540 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16463 transitions. Word has length 23 [2021-06-05 22:39:54,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:54,540 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16463 transitions. [2021-06-05 22:39:54,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:54,540 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16463 transitions. [2021-06-05 22:39:54,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:54,545 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:54,545 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:54,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1104,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:54,745 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:54,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:54,746 INFO L82 PathProgramCache]: Analyzing trace with hash 981500449, now seen corresponding path program 354 times [2021-06-05 22:39:54,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:54,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346414951] [2021-06-05 22:39:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:54,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:54,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346414951] [2021-06-05 22:39:54,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346414951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:54,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775506423] [2021-06-05 22:39:54,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:54,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:39:54,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:54,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:39:54,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:54,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:54,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:54,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:54,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:39:54,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:54,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:54,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:54,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:48 [2021-06-05 22:39:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:55,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775506423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:55,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:55,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:39:55,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470364251] [2021-06-05 22:39:55,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:39:55,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:55,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:39:55,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:39:55,093 INFO L87 Difference]: Start difference. First operand 3924 states and 16463 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:55,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:55,857 INFO L93 Difference]: Finished difference Result 4236 states and 17665 transitions. [2021-06-05 22:39:55,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:39:55,858 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:55,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:55,865 INFO L225 Difference]: With dead ends: 4236 [2021-06-05 22:39:55,865 INFO L226 Difference]: Without dead ends: 4215 [2021-06-05 22:39:55,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 619.2ms TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:39:55,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4215 states. [2021-06-05 22:39:55,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4215 to 3916. [2021-06-05 22:39:55,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196679438058748) internal successors, (16430), 3915 states have internal predecessors, (16430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16430 transitions. [2021-06-05 22:39:55,915 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16430 transitions. Word has length 23 [2021-06-05 22:39:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:55,915 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16430 transitions. [2021-06-05 22:39:55,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16430 transitions. [2021-06-05 22:39:55,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:55,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:55,920 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:56,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1106 [2021-06-05 22:39:56,121 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:56,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:56,121 INFO L82 PathProgramCache]: Analyzing trace with hash 162475199, now seen corresponding path program 355 times [2021-06-05 22:39:56,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:56,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595458004] [2021-06-05 22:39:56,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:56,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:56,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595458004] [2021-06-05 22:39:56,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595458004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:56,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401697672] [2021-06-05 22:39:56,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:56,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:56,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:56,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:56,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:39:56,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:56,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:56,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:56,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:39:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:56,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401697672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:56,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:56,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:56,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061833436] [2021-06-05 22:39:56,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:56,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:56,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:56,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:56,435 INFO L87 Difference]: Start difference. First operand 3916 states and 16430 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:57,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:57,287 INFO L93 Difference]: Finished difference Result 4751 states and 19722 transitions. [2021-06-05 22:39:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:39:57,287 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:57,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:57,295 INFO L225 Difference]: With dead ends: 4751 [2021-06-05 22:39:57,295 INFO L226 Difference]: Without dead ends: 4729 [2021-06-05 22:39:57,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 659.8ms TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:39:57,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4729 states. [2021-06-05 22:39:57,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4729 to 3920. [2021-06-05 22:39:57,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.196989027813218) internal successors, (16448), 3919 states have internal predecessors, (16448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:57,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16448 transitions. [2021-06-05 22:39:57,350 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16448 transitions. Word has length 23 [2021-06-05 22:39:57,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:57,351 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16448 transitions. [2021-06-05 22:39:57,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:57,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16448 transitions. [2021-06-05 22:39:57,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:57,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:57,356 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:57,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-05 22:39:57,556 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:57,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:57,556 INFO L82 PathProgramCache]: Analyzing trace with hash 676002051, now seen corresponding path program 356 times [2021-06-05 22:39:57,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:57,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087182304] [2021-06-05 22:39:57,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:57,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:57,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087182304] [2021-06-05 22:39:57,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087182304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:57,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661100626] [2021-06-05 22:39:57,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:57,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:57,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:57,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:57,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:57,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:57,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:57,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:57,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:57,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:57,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:39:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:57,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661100626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:57,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:57,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:57,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328410124] [2021-06-05 22:39:57,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:57,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:57,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:57,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:57,852 INFO L87 Difference]: Start difference. First operand 3920 states and 16448 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:58,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:58,466 INFO L93 Difference]: Finished difference Result 4579 states and 19011 transitions. [2021-06-05 22:39:58,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:39:58,466 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:58,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:58,475 INFO L225 Difference]: With dead ends: 4579 [2021-06-05 22:39:58,475 INFO L226 Difference]: Without dead ends: 4554 [2021-06-05 22:39:58,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 542.1ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:39:58,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2021-06-05 22:39:58,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 3924. [2021-06-05 22:39:58,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.196788172317104) internal successors, (16464), 3923 states have internal predecessors, (16464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:58,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16464 transitions. [2021-06-05 22:39:58,528 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16464 transitions. Word has length 23 [2021-06-05 22:39:58,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:58,528 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16464 transitions. [2021-06-05 22:39:58,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:58,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16464 transitions. [2021-06-05 22:39:58,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:39:58,533 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:58,533 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:58,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 511 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1112 [2021-06-05 22:39:58,734 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:58,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:58,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1751713207, now seen corresponding path program 357 times [2021-06-05 22:39:58,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:58,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301262743] [2021-06-05 22:39:58,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:58,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:58,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301262743] [2021-06-05 22:39:58,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301262743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:58,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761121388] [2021-06-05 22:39:58,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:58,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:39:58,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:58,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:39:58,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:58,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:58,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:39:58,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:58,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:58,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:58,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:39:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:59,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761121388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:59,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:59,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:39:59,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170984963] [2021-06-05 22:39:59,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:59,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:59,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:59,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:59,057 INFO L87 Difference]: Start difference. First operand 3924 states and 16464 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:59,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:59,965 INFO L93 Difference]: Finished difference Result 4583 states and 19039 transitions. [2021-06-05 22:39:59,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:39:59,965 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:39:59,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:59,974 INFO L225 Difference]: With dead ends: 4583 [2021-06-05 22:39:59,974 INFO L226 Difference]: Without dead ends: 4562 [2021-06-05 22:39:59,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 746.3ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:39:59,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4562 states. [2021-06-05 22:40:00,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4562 to 3916. [2021-06-05 22:40:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196679438058748) internal successors, (16430), 3915 states have internal predecessors, (16430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:00,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16430 transitions. [2021-06-05 22:40:00,030 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16430 transitions. Word has length 23 [2021-06-05 22:40:00,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:00,031 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16430 transitions. [2021-06-05 22:40:00,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:00,031 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16430 transitions. [2021-06-05 22:40:00,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:00,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:00,036 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:00,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1114 [2021-06-05 22:40:00,236 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:00,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:00,237 INFO L82 PathProgramCache]: Analyzing trace with hash 571982697, now seen corresponding path program 358 times [2021-06-05 22:40:00,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:00,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121864164] [2021-06-05 22:40:00,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:00,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:00,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121864164] [2021-06-05 22:40:00,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121864164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:00,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395049553] [2021-06-05 22:40:00,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:00,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:00,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:00,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:00,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:00,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:00,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:40:00,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:00,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:00,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:00,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:40:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:00,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395049553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:00,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:00,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:00,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751067] [2021-06-05 22:40:00,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:00,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:00,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:00,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:00,518 INFO L87 Difference]: Start difference. First operand 3916 states and 16430 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:01,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:01,082 INFO L93 Difference]: Finished difference Result 4620 states and 19163 transitions. [2021-06-05 22:40:01,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:40:01,082 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:01,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:01,090 INFO L225 Difference]: With dead ends: 4620 [2021-06-05 22:40:01,090 INFO L226 Difference]: Without dead ends: 4589 [2021-06-05 22:40:01,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 456.3ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:40:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-06-05 22:40:01,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 3916. [2021-06-05 22:40:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196679438058748) internal successors, (16430), 3915 states have internal predecessors, (16430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:01,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16430 transitions. [2021-06-05 22:40:01,145 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16430 transitions. Word has length 23 [2021-06-05 22:40:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:01,145 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16430 transitions. [2021-06-05 22:40:01,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:01,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16430 transitions. [2021-06-05 22:40:01,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:01,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:01,150 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:01,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1116,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:01,350 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:01,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:01,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2059528121, now seen corresponding path program 359 times [2021-06-05 22:40:01,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:01,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137530971] [2021-06-05 22:40:01,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:01,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:01,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137530971] [2021-06-05 22:40:01,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137530971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:01,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980212440] [2021-06-05 22:40:01,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:01,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:40:01,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:01,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:01,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:01,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:01,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:01,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:01,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:01,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:01,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:40:01,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:01,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980212440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:01,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:01,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:01,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908302755] [2021-06-05 22:40:01,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:01,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:01,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:01,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:01,644 INFO L87 Difference]: Start difference. First operand 3916 states and 16430 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:02,635 INFO L93 Difference]: Finished difference Result 4481 states and 18639 transitions. [2021-06-05 22:40:02,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:40:02,635 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:02,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:02,643 INFO L225 Difference]: With dead ends: 4481 [2021-06-05 22:40:02,643 INFO L226 Difference]: Without dead ends: 4460 [2021-06-05 22:40:02,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 717.5ms TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:40:02,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2021-06-05 22:40:02,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3908. [2021-06-05 22:40:02,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3907 states have (on average 4.197850012797542) internal successors, (16401), 3907 states have internal predecessors, (16401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 16401 transitions. [2021-06-05 22:40:02,698 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 16401 transitions. Word has length 23 [2021-06-05 22:40:02,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:02,698 INFO L482 AbstractCegarLoop]: Abstraction has 3908 states and 16401 transitions. [2021-06-05 22:40:02,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:02,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 16401 transitions. [2021-06-05 22:40:02,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:02,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:02,703 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:02,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1118,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:02,904 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:02,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:02,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1971726573, now seen corresponding path program 360 times [2021-06-05 22:40:02,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:02,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827465804] [2021-06-05 22:40:02,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:03,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:03,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827465804] [2021-06-05 22:40:03,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827465804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:03,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909915907] [2021-06-05 22:40:03,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:03,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:40:03,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:03,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:03,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:03,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:03,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:03,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 22:40:03,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:40:03,162 INFO L628 ElimStorePlain]: treesize reduction 55, result has 28.6 percent of original size [2021-06-05 22:40:03,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:03,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 22:40:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:03,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909915907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:03,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:03,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:40:03,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65176360] [2021-06-05 22:40:03,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:40:03,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:03,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:40:03,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:40:03,227 INFO L87 Difference]: Start difference. First operand 3908 states and 16401 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:03,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:03,868 INFO L93 Difference]: Finished difference Result 4190 states and 17466 transitions. [2021-06-05 22:40:03,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:40:03,869 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:03,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:03,877 INFO L225 Difference]: With dead ends: 4190 [2021-06-05 22:40:03,877 INFO L226 Difference]: Without dead ends: 4164 [2021-06-05 22:40:03,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 424.2ms TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:40:03,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4164 states. [2021-06-05 22:40:03,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4164 to 3915. [2021-06-05 22:40:03,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3915 states, 3914 states have (on average 4.196474195196729) internal successors, (16425), 3914 states have internal predecessors, (16425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:03,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3915 states to 3915 states and 16425 transitions. [2021-06-05 22:40:03,930 INFO L78 Accepts]: Start accepts. Automaton has 3915 states and 16425 transitions. Word has length 23 [2021-06-05 22:40:03,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:03,931 INFO L482 AbstractCegarLoop]: Abstraction has 3915 states and 16425 transitions. [2021-06-05 22:40:03,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:03,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3915 states and 16425 transitions. [2021-06-05 22:40:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:03,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:03,936 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:04,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1120,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:04,136 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:04,137 INFO L82 PathProgramCache]: Analyzing trace with hash 930150505, now seen corresponding path program 361 times [2021-06-05 22:40:04,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:04,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783379013] [2021-06-05 22:40:04,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:04,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:04,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783379013] [2021-06-05 22:40:04,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783379013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:04,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876030388] [2021-06-05 22:40:04,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:04,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:04,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:04,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:04,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:40:04,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:04,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:04,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:04,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:40:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:04,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876030388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:04,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:04,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:04,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980831359] [2021-06-05 22:40:04,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:04,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:04,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:04,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:04,449 INFO L87 Difference]: Start difference. First operand 3915 states and 16425 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:04,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:04,918 INFO L93 Difference]: Finished difference Result 4159 states and 17347 transitions. [2021-06-05 22:40:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:40:04,919 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:04,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:04,926 INFO L225 Difference]: With dead ends: 4159 [2021-06-05 22:40:04,926 INFO L226 Difference]: Without dead ends: 4131 [2021-06-05 22:40:04,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 406.3ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2021-06-05 22:40:04,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 3908. [2021-06-05 22:40:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3907 states have (on average 4.197082160225237) internal successors, (16398), 3907 states have internal predecessors, (16398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 16398 transitions. [2021-06-05 22:40:04,980 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 16398 transitions. Word has length 23 [2021-06-05 22:40:04,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:04,980 INFO L482 AbstractCegarLoop]: Abstraction has 3908 states and 16398 transitions. [2021-06-05 22:40:04,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:04,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 16398 transitions. [2021-06-05 22:40:04,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:04,986 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:04,986 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:05,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1124,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:05,186 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:05,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:05,187 INFO L82 PathProgramCache]: Analyzing trace with hash 44352225, now seen corresponding path program 362 times [2021-06-05 22:40:05,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:05,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030095135] [2021-06-05 22:40:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:05,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:05,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030095135] [2021-06-05 22:40:05,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030095135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:05,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837165769] [2021-06-05 22:40:05,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:05,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:05,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:05,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:05,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:05,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:05,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:40:05,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:05,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:05,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:05,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:40:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:05,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837165769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:05,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:05,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:05,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920095946] [2021-06-05 22:40:05,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:05,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:05,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:05,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:05,491 INFO L87 Difference]: Start difference. First operand 3908 states and 16398 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:06,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:06,037 INFO L93 Difference]: Finished difference Result 4325 states and 18000 transitions. [2021-06-05 22:40:06,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:40:06,037 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:06,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:06,045 INFO L225 Difference]: With dead ends: 4325 [2021-06-05 22:40:06,045 INFO L226 Difference]: Without dead ends: 4291 [2021-06-05 22:40:06,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 370.6ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:40:06,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4291 states. [2021-06-05 22:40:06,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4291 to 3901. [2021-06-05 22:40:06,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.197435897435898) internal successors, (16370), 3900 states have internal predecessors, (16370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:06,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16370 transitions. [2021-06-05 22:40:06,098 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16370 transitions. Word has length 23 [2021-06-05 22:40:06,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:06,098 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16370 transitions. [2021-06-05 22:40:06,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:06,098 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16370 transitions. [2021-06-05 22:40:06,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:06,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:06,103 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:06,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1126 [2021-06-05 22:40:06,304 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:06,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:06,304 INFO L82 PathProgramCache]: Analyzing trace with hash -140702057, now seen corresponding path program 363 times [2021-06-05 22:40:06,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:06,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105038092] [2021-06-05 22:40:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:06,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:06,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105038092] [2021-06-05 22:40:06,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105038092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:06,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841503893] [2021-06-05 22:40:06,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:06,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:40:06,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:06,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:06,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:06,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:06,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:06,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:06,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:06,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:06,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:40:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:06,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841503893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:06,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:06,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:06,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28444056] [2021-06-05 22:40:06,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:06,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:06,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:06,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:06,626 INFO L87 Difference]: Start difference. First operand 3901 states and 16370 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:07,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:07,011 INFO L93 Difference]: Finished difference Result 4120 states and 17191 transitions. [2021-06-05 22:40:07,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:40:07,011 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:07,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:07,018 INFO L225 Difference]: With dead ends: 4120 [2021-06-05 22:40:07,018 INFO L226 Difference]: Without dead ends: 4094 [2021-06-05 22:40:07,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 369.3ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:07,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4094 states. [2021-06-05 22:40:07,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4094 to 3910. [2021-06-05 22:40:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3910 states, 3909 states have (on average 4.195958045535943) internal successors, (16402), 3909 states have internal predecessors, (16402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3910 states to 3910 states and 16402 transitions. [2021-06-05 22:40:07,070 INFO L78 Accepts]: Start accepts. Automaton has 3910 states and 16402 transitions. Word has length 23 [2021-06-05 22:40:07,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:07,070 INFO L482 AbstractCegarLoop]: Abstraction has 3910 states and 16402 transitions. [2021-06-05 22:40:07,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:07,070 INFO L276 IsEmpty]: Start isEmpty. Operand 3910 states and 16402 transitions. [2021-06-05 22:40:07,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:07,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:07,075 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:07,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1128,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:07,276 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:07,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:07,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1182278125, now seen corresponding path program 364 times [2021-06-05 22:40:07,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:07,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904116031] [2021-06-05 22:40:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:07,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:07,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904116031] [2021-06-05 22:40:07,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904116031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:07,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741719777] [2021-06-05 22:40:07,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:07,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:07,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:07,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:07,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:07,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:07,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:07,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:07,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:07,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:07,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:40:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:07,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741719777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:07,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:07,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:07,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654488311] [2021-06-05 22:40:07,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:07,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:07,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:07,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:07,629 INFO L87 Difference]: Start difference. First operand 3910 states and 16402 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:08,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:08,021 INFO L93 Difference]: Finished difference Result 4119 states and 17186 transitions. [2021-06-05 22:40:08,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:40:08,021 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:08,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:08,028 INFO L225 Difference]: With dead ends: 4119 [2021-06-05 22:40:08,028 INFO L226 Difference]: Without dead ends: 4091 [2021-06-05 22:40:08,029 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 427.2ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:08,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4091 states. [2021-06-05 22:40:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4091 to 3903. [2021-06-05 22:40:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.1973347001537675) internal successors, (16378), 3902 states have internal predecessors, (16378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:08,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 16378 transitions. [2021-06-05 22:40:08,079 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 16378 transitions. Word has length 23 [2021-06-05 22:40:08,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:08,079 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 16378 transitions. [2021-06-05 22:40:08,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:08,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 16378 transitions. [2021-06-05 22:40:08,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:08,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:08,085 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:08,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1130 [2021-06-05 22:40:08,285 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:08,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:08,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1469399477, now seen corresponding path program 365 times [2021-06-05 22:40:08,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:08,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991557451] [2021-06-05 22:40:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:08,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:08,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:08,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991557451] [2021-06-05 22:40:08,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991557451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:08,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420667135] [2021-06-05 22:40:08,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:08,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:40:08,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:08,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:08,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:08,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:08,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:08,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:08,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:08,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:08,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:40:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:08,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420667135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:08,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:08,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:08,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021137843] [2021-06-05 22:40:08,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:08,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:08,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:08,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:08,598 INFO L87 Difference]: Start difference. First operand 3903 states and 16378 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:08,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:08,978 INFO L93 Difference]: Finished difference Result 4143 states and 17282 transitions. [2021-06-05 22:40:08,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:40:08,978 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:08,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:08,986 INFO L225 Difference]: With dead ends: 4143 [2021-06-05 22:40:08,986 INFO L226 Difference]: Without dead ends: 4117 [2021-06-05 22:40:08,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 360.2ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:08,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4117 states. [2021-06-05 22:40:09,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4117 to 3907. [2021-06-05 22:40:09,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 4.197132616487456) internal successors, (16394), 3906 states have internal predecessors, (16394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:09,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 16394 transitions. [2021-06-05 22:40:09,040 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 16394 transitions. Word has length 23 [2021-06-05 22:40:09,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:09,040 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 16394 transitions. [2021-06-05 22:40:09,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:09,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 16394 transitions. [2021-06-05 22:40:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:09,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:09,045 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:09,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1132 [2021-06-05 22:40:09,246 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:09,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:09,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1962616863, now seen corresponding path program 366 times [2021-06-05 22:40:09,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:09,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790070687] [2021-06-05 22:40:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:09,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:09,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790070687] [2021-06-05 22:40:09,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790070687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:09,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247306689] [2021-06-05 22:40:09,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:09,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:40:09,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:09,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:40:09,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:09,474 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:40:09,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 22:40:09,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:09,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:09,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:09,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:41 [2021-06-05 22:40:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:09,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247306689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:09,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:09,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:40:09,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399461510] [2021-06-05 22:40:09,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:40:09,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:09,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:40:09,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:40:09,602 INFO L87 Difference]: Start difference. First operand 3907 states and 16394 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:10,257 INFO L93 Difference]: Finished difference Result 4222 states and 17600 transitions. [2021-06-05 22:40:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:40:10,258 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:10,265 INFO L225 Difference]: With dead ends: 4222 [2021-06-05 22:40:10,265 INFO L226 Difference]: Without dead ends: 4201 [2021-06-05 22:40:10,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 565.8ms TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:40:10,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-05 22:40:10,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3903. [2021-06-05 22:40:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.1973347001537675) internal successors, (16378), 3902 states have internal predecessors, (16378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:10,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 16378 transitions. [2021-06-05 22:40:10,316 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 16378 transitions. Word has length 23 [2021-06-05 22:40:10,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:10,316 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 16378 transitions. [2021-06-05 22:40:10,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:10,316 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 16378 transitions. [2021-06-05 22:40:10,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:10,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:10,321 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:10,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-06-05 22:40:10,521 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:10,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:10,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1027840607, now seen corresponding path program 367 times [2021-06-05 22:40:10,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:10,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342518284] [2021-06-05 22:40:10,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:10,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:10,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342518284] [2021-06-05 22:40:10,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342518284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:10,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439373089] [2021-06-05 22:40:10,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:10,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:10,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:10,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:10,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:10,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:10,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:10,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:10,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:40:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:10,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439373089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:10,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:10,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:10,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106306293] [2021-06-05 22:40:10,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:10,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:10,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:10,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:10,840 INFO L87 Difference]: Start difference. First operand 3903 states and 16378 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:11,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:11,389 INFO L93 Difference]: Finished difference Result 4184 states and 17448 transitions. [2021-06-05 22:40:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:40:11,390 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:11,397 INFO L225 Difference]: With dead ends: 4184 [2021-06-05 22:40:11,397 INFO L226 Difference]: Without dead ends: 4159 [2021-06-05 22:40:11,397 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 513.8ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:40:11,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2021-06-05 22:40:11,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 3907. [2021-06-05 22:40:11,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 4.197132616487456) internal successors, (16394), 3906 states have internal predecessors, (16394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:11,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 16394 transitions. [2021-06-05 22:40:11,447 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 16394 transitions. Word has length 23 [2021-06-05 22:40:11,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:11,448 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 16394 transitions. [2021-06-05 22:40:11,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:11,448 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 16394 transitions. [2021-06-05 22:40:11,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:11,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:11,453 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:11,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1138,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:11,653 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:11,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:11,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2040533139, now seen corresponding path program 368 times [2021-06-05 22:40:11,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:11,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974508556] [2021-06-05 22:40:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:11,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:11,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974508556] [2021-06-05 22:40:11,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974508556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:11,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520630469] [2021-06-05 22:40:11,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:11,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:11,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:11,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:11,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:11,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:11,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:11,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:11,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:11,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:11,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:40:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:11,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520630469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:11,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:11,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:11,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780027933] [2021-06-05 22:40:11,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:11,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:11,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:11,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:11,973 INFO L87 Difference]: Start difference. First operand 3907 states and 16394 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:12,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:12,728 INFO L93 Difference]: Finished difference Result 4176 states and 17426 transitions. [2021-06-05 22:40:12,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:40:12,728 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:12,735 INFO L225 Difference]: With dead ends: 4176 [2021-06-05 22:40:12,735 INFO L226 Difference]: Without dead ends: 4155 [2021-06-05 22:40:12,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 693.1ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:40:12,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-05 22:40:12,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3901. [2021-06-05 22:40:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.197435897435898) internal successors, (16370), 3900 states have internal predecessors, (16370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:12,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16370 transitions. [2021-06-05 22:40:12,806 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16370 transitions. Word has length 23 [2021-06-05 22:40:12,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:12,807 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16370 transitions. [2021-06-05 22:40:12,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:12,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16370 transitions. [2021-06-05 22:40:12,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:12,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:12,812 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:13,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1140,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:13,012 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:13,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:13,013 INFO L82 PathProgramCache]: Analyzing trace with hash 536947987, now seen corresponding path program 369 times [2021-06-05 22:40:13,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:13,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823730107] [2021-06-05 22:40:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:13,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:13,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823730107] [2021-06-05 22:40:13,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823730107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:13,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657815817] [2021-06-05 22:40:13,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:13,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:40:13,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:13,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:13,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:13,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:13,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:40:13,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:13,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:13,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:13,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:40:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:13,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657815817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:13,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:13,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:13,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076561231] [2021-06-05 22:40:13,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:13,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:13,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:13,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:13,305 INFO L87 Difference]: Start difference. First operand 3901 states and 16370 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:13,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:13,769 INFO L93 Difference]: Finished difference Result 4404 states and 18312 transitions. [2021-06-05 22:40:13,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:40:13,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:13,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:13,777 INFO L225 Difference]: With dead ends: 4404 [2021-06-05 22:40:13,778 INFO L226 Difference]: Without dead ends: 4373 [2021-06-05 22:40:13,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 431.0ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:40:13,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4373 states. [2021-06-05 22:40:13,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4373 to 3903. [2021-06-05 22:40:13,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.196822142491031) internal successors, (16376), 3902 states have internal predecessors, (16376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 16376 transitions. [2021-06-05 22:40:13,832 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 16376 transitions. Word has length 23 [2021-06-05 22:40:13,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:13,832 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 16376 transitions. [2021-06-05 22:40:13,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:13,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 16376 transitions. [2021-06-05 22:40:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:13,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:13,838 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:14,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1142,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:14,038 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:14,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1577183785, now seen corresponding path program 370 times [2021-06-05 22:40:14,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:14,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943071886] [2021-06-05 22:40:14,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:14,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:14,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943071886] [2021-06-05 22:40:14,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943071886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:14,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965318144] [2021-06-05 22:40:14,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:14,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:14,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:14,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:14,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:14,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:14,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:14,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:14,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:14,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:14,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:40:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:14,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965318144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:14,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:14,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:14,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553504735] [2021-06-05 22:40:14,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:14,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:14,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:14,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:14,339 INFO L87 Difference]: Start difference. First operand 3903 states and 16376 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:14,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:14,899 INFO L93 Difference]: Finished difference Result 4322 states and 17993 transitions. [2021-06-05 22:40:14,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:40:14,899 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:14,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:14,907 INFO L225 Difference]: With dead ends: 4322 [2021-06-05 22:40:14,907 INFO L226 Difference]: Without dead ends: 4297 [2021-06-05 22:40:14,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 533.1ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:40:14,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4297 states. [2021-06-05 22:40:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4297 to 3907. [2021-06-05 22:40:14,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 4.196620583717358) internal successors, (16392), 3906 states have internal predecessors, (16392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 16392 transitions. [2021-06-05 22:40:14,960 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 16392 transitions. Word has length 23 [2021-06-05 22:40:14,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:14,960 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 16392 transitions. [2021-06-05 22:40:14,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:14,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 16392 transitions. [2021-06-05 22:40:14,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:14,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:14,965 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:15,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-06-05 22:40:15,166 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:15,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:15,166 INFO L82 PathProgramCache]: Analyzing trace with hash 564491253, now seen corresponding path program 371 times [2021-06-05 22:40:15,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:15,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994985139] [2021-06-05 22:40:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:15,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:15,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994985139] [2021-06-05 22:40:15,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994985139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:15,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166038302] [2021-06-05 22:40:15,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:15,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:40:15,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:15,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:15,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:15,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:15,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:15,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:15,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:15,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:15,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:40:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:15,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166038302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:15,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:15,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:15,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901878271] [2021-06-05 22:40:15,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:15,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:15,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:15,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:15,514 INFO L87 Difference]: Start difference. First operand 3907 states and 16392 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:16,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:16,338 INFO L93 Difference]: Finished difference Result 4340 states and 18073 transitions. [2021-06-05 22:40:16,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:40:16,338 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:16,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:16,346 INFO L225 Difference]: With dead ends: 4340 [2021-06-05 22:40:16,346 INFO L226 Difference]: Without dead ends: 4319 [2021-06-05 22:40:16,346 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 716.8ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:40:16,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4319 states. [2021-06-05 22:40:16,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4319 to 3899. [2021-06-05 22:40:16,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3898 states have (on average 4.196511031298102) internal successors, (16358), 3898 states have internal predecessors, (16358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:16,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 16358 transitions. [2021-06-05 22:40:16,398 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 16358 transitions. Word has length 23 [2021-06-05 22:40:16,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:16,398 INFO L482 AbstractCegarLoop]: Abstraction has 3899 states and 16358 transitions. [2021-06-05 22:40:16,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:16,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 16358 transitions. [2021-06-05 22:40:16,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:16,404 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:16,404 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:16,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1146 [2021-06-05 22:40:16,604 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:16,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:16,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1581030667, now seen corresponding path program 372 times [2021-06-05 22:40:16,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:16,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146785083] [2021-06-05 22:40:16,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:16,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:16,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146785083] [2021-06-05 22:40:16,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146785083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:16,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312835326] [2021-06-05 22:40:16,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:16,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:40:16,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:16,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:16,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:16,868 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 22:40:16,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 72 [2021-06-05 22:40:16,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:16,892 INFO L628 ElimStorePlain]: treesize reduction 70, result has 16.7 percent of original size [2021-06-05 22:40:16,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:16,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:14 [2021-06-05 22:40:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:16,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312835326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:16,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:16,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:40:16,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714702900] [2021-06-05 22:40:16,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:40:16,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:16,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:40:16,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:40:16,932 INFO L87 Difference]: Start difference. First operand 3899 states and 16358 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:17,908 INFO L93 Difference]: Finished difference Result 4355 states and 18141 transitions. [2021-06-05 22:40:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:40:17,909 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:17,916 INFO L225 Difference]: With dead ends: 4355 [2021-06-05 22:40:17,917 INFO L226 Difference]: Without dead ends: 4333 [2021-06-05 22:40:17,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 483.6ms TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:40:17,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-06-05 22:40:17,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3903. [2021-06-05 22:40:17,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.196822142491031) internal successors, (16376), 3902 states have internal predecessors, (16376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:17,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 16376 transitions. [2021-06-05 22:40:17,971 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 16376 transitions. Word has length 23 [2021-06-05 22:40:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:17,971 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 16376 transitions. [2021-06-05 22:40:17,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 16376 transitions. [2021-06-05 22:40:17,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:17,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:17,976 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:18,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1148,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:18,177 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:18,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:18,177 INFO L82 PathProgramCache]: Analyzing trace with hash -995696715, now seen corresponding path program 373 times [2021-06-05 22:40:18,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:18,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720504643] [2021-06-05 22:40:18,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:18,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:18,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720504643] [2021-06-05 22:40:18,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720504643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:18,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531144759] [2021-06-05 22:40:18,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:18,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:18,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:18,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:18,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:18,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:18,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:18,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:18,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:40:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:18,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531144759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:18,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:18,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:18,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160846226] [2021-06-05 22:40:18,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:18,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:18,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:18,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:18,502 INFO L87 Difference]: Start difference. First operand 3903 states and 16376 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:18,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:18,910 INFO L93 Difference]: Finished difference Result 4217 states and 17575 transitions. [2021-06-05 22:40:18,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:40:18,910 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:18,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:18,917 INFO L225 Difference]: With dead ends: 4217 [2021-06-05 22:40:18,917 INFO L226 Difference]: Without dead ends: 4191 [2021-06-05 22:40:18,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 434.8ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:40:18,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2021-06-05 22:40:18,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 3907. [2021-06-05 22:40:18,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 4.196620583717358) internal successors, (16392), 3906 states have internal predecessors, (16392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:18,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 16392 transitions. [2021-06-05 22:40:18,971 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 16392 transitions. Word has length 23 [2021-06-05 22:40:18,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:18,972 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 16392 transitions. [2021-06-05 22:40:18,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:18,972 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 16392 transitions. [2021-06-05 22:40:18,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:18,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:18,977 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:19,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1152,528 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:19,177 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:19,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:19,178 INFO L82 PathProgramCache]: Analyzing trace with hash 617870019, now seen corresponding path program 374 times [2021-06-05 22:40:19,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:19,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804585420] [2021-06-05 22:40:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:19,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:19,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804585420] [2021-06-05 22:40:19,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804585420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:19,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91777199] [2021-06-05 22:40:19,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:19,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:19,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:19,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:19,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:19,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:19,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:19,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:19,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:19,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:19,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:40:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:19,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91777199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:19,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:19,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:19,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368500880] [2021-06-05 22:40:19,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:19,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:19,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:19,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:19,471 INFO L87 Difference]: Start difference. First operand 3907 states and 16392 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:20,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:20,181 INFO L93 Difference]: Finished difference Result 4216 states and 17584 transitions. [2021-06-05 22:40:20,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:40:20,182 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:20,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:20,189 INFO L225 Difference]: With dead ends: 4216 [2021-06-05 22:40:20,189 INFO L226 Difference]: Without dead ends: 4195 [2021-06-05 22:40:20,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 659.8ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:40:20,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-06-05 22:40:20,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 3899. [2021-06-05 22:40:20,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3898 states have (on average 4.196511031298102) internal successors, (16358), 3898 states have internal predecessors, (16358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:20,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 16358 transitions. [2021-06-05 22:40:20,241 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 16358 transitions. Word has length 23 [2021-06-05 22:40:20,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:20,241 INFO L482 AbstractCegarLoop]: Abstraction has 3899 states and 16358 transitions. [2021-06-05 22:40:20,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:20,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 16358 transitions. [2021-06-05 22:40:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:20,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:20,246 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:20,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 529 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-06-05 22:40:20,447 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:20,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:20,447 INFO L82 PathProgramCache]: Analyzing trace with hash 61981813, now seen corresponding path program 375 times [2021-06-05 22:40:20,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:20,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724895860] [2021-06-05 22:40:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:20,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:20,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724895860] [2021-06-05 22:40:20,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724895860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:20,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516375555] [2021-06-05 22:40:20,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:20,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:40:20,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:20,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:20,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:20,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:20,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:20,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:20,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:20,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:20,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:40:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:20,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516375555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:20,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:20,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:20,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228455405] [2021-06-05 22:40:20,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:20,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:20,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:20,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:20,760 INFO L87 Difference]: Start difference. First operand 3899 states and 16358 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:21,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:21,105 INFO L93 Difference]: Finished difference Result 4126 states and 17214 transitions. [2021-06-05 22:40:21,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:40:21,105 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:21,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:21,113 INFO L225 Difference]: With dead ends: 4126 [2021-06-05 22:40:21,113 INFO L226 Difference]: Without dead ends: 4100 [2021-06-05 22:40:21,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 375.3ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:21,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2021-06-05 22:40:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 3908. [2021-06-05 22:40:21,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3907 states have (on average 4.195034553365754) internal successors, (16390), 3907 states have internal predecessors, (16390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:21,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 16390 transitions. [2021-06-05 22:40:21,164 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 16390 transitions. Word has length 23 [2021-06-05 22:40:21,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:21,164 INFO L482 AbstractCegarLoop]: Abstraction has 3908 states and 16390 transitions. [2021-06-05 22:40:21,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:21,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 16390 transitions. [2021-06-05 22:40:21,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:21,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:21,170 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:21,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1156,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:21,370 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:21,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:21,370 INFO L82 PathProgramCache]: Analyzing trace with hash -979594255, now seen corresponding path program 376 times [2021-06-05 22:40:21,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:21,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138957838] [2021-06-05 22:40:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:21,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:21,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138957838] [2021-06-05 22:40:21,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138957838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:21,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13104717] [2021-06-05 22:40:21,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:21,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:21,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:21,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:21,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:21,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:21,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:21,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:21,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:21,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:21,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:40:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:21,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13104717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:21,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:21,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:21,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059418230] [2021-06-05 22:40:21,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:21,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:21,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:21,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:21,685 INFO L87 Difference]: Start difference. First operand 3908 states and 16390 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:22,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:22,053 INFO L93 Difference]: Finished difference Result 4083 states and 17047 transitions. [2021-06-05 22:40:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:40:22,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:22,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:22,061 INFO L225 Difference]: With dead ends: 4083 [2021-06-05 22:40:22,061 INFO L226 Difference]: Without dead ends: 4055 [2021-06-05 22:40:22,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 393.8ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4055 states. [2021-06-05 22:40:22,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4055 to 3901. [2021-06-05 22:40:22,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.196410256410257) internal successors, (16366), 3900 states have internal predecessors, (16366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16366 transitions. [2021-06-05 22:40:22,110 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16366 transitions. Word has length 23 [2021-06-05 22:40:22,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:22,111 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16366 transitions. [2021-06-05 22:40:22,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:22,111 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16366 transitions. [2021-06-05 22:40:22,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:22,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:22,116 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:22,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1158 [2021-06-05 22:40:22,316 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:22,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:22,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1266715607, now seen corresponding path program 377 times [2021-06-05 22:40:22,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:22,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177980681] [2021-06-05 22:40:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:22,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:22,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177980681] [2021-06-05 22:40:22,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177980681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:22,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274334830] [2021-06-05 22:40:22,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:22,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:40:22,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:22,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:22,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:22,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:22,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:22,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:22,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:22,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:22,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:40:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:22,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274334830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:22,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:22,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:22,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155224790] [2021-06-05 22:40:22,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:22,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:22,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:22,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:22,626 INFO L87 Difference]: Start difference. First operand 3901 states and 16366 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:22,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:22,979 INFO L93 Difference]: Finished difference Result 4147 states and 17297 transitions. [2021-06-05 22:40:22,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:40:22,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:22,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:22,986 INFO L225 Difference]: With dead ends: 4147 [2021-06-05 22:40:22,986 INFO L226 Difference]: Without dead ends: 4121 [2021-06-05 22:40:22,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 356.7ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:22,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-06-05 22:40:23,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 3905. [2021-06-05 22:40:23,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3905 states, 3904 states have (on average 4.196209016393443) internal successors, (16382), 3904 states have internal predecessors, (16382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:23,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 16382 transitions. [2021-06-05 22:40:23,035 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 16382 transitions. Word has length 23 [2021-06-05 22:40:23,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:23,035 INFO L482 AbstractCegarLoop]: Abstraction has 3905 states and 16382 transitions. [2021-06-05 22:40:23,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:23,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 16382 transitions. [2021-06-05 22:40:23,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:23,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:23,040 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:23,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1160,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:23,241 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:23,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:23,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1759932993, now seen corresponding path program 378 times [2021-06-05 22:40:23,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:23,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89771958] [2021-06-05 22:40:23,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:23,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:23,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89771958] [2021-06-05 22:40:23,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89771958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:23,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222030503] [2021-06-05 22:40:23,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:23,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:40:23,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:23,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:23,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:23,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:23,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:23,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:23,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 22:40:23,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:23,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:23,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:23,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 22:40:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:23,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222030503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:23,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:23,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:40:23,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962827483] [2021-06-05 22:40:23,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:40:23,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:23,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:40:23,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:40:23,590 INFO L87 Difference]: Start difference. First operand 3905 states and 16382 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:24,335 INFO L93 Difference]: Finished difference Result 4161 states and 17362 transitions. [2021-06-05 22:40:24,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:40:24,335 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:24,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:24,342 INFO L225 Difference]: With dead ends: 4161 [2021-06-05 22:40:24,342 INFO L226 Difference]: Without dead ends: 4140 [2021-06-05 22:40:24,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 566.6ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:40:24,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4140 states. [2021-06-05 22:40:24,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4140 to 3901. [2021-06-05 22:40:24,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.196410256410257) internal successors, (16366), 3900 states have internal predecessors, (16366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16366 transitions. [2021-06-05 22:40:24,394 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16366 transitions. Word has length 23 [2021-06-05 22:40:24,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:24,394 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16366 transitions. [2021-06-05 22:40:24,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:24,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16366 transitions. [2021-06-05 22:40:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:24,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:24,400 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:24,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1162,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:24,600 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:24,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:24,600 INFO L82 PathProgramCache]: Analyzing trace with hash -825156737, now seen corresponding path program 379 times [2021-06-05 22:40:24,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:24,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474445727] [2021-06-05 22:40:24,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:24,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:24,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474445727] [2021-06-05 22:40:24,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474445727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:24,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219492282] [2021-06-05 22:40:24,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:24,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:24,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:24,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:24,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:24,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:24,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:24,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:24,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:40:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:24,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219492282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:24,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:24,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:24,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222953274] [2021-06-05 22:40:24,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:24,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:24,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:24,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:24,915 INFO L87 Difference]: Start difference. First operand 3901 states and 16366 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:25,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:25,423 INFO L93 Difference]: Finished difference Result 4152 states and 17321 transitions. [2021-06-05 22:40:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:40:25,424 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:25,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:25,431 INFO L225 Difference]: With dead ends: 4152 [2021-06-05 22:40:25,431 INFO L226 Difference]: Without dead ends: 4127 [2021-06-05 22:40:25,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 498.1ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:40:25,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2021-06-05 22:40:25,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 3905. [2021-06-05 22:40:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3905 states, 3904 states have (on average 4.196209016393443) internal successors, (16382), 3904 states have internal predecessors, (16382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 16382 transitions. [2021-06-05 22:40:25,481 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 16382 transitions. Word has length 23 [2021-06-05 22:40:25,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:25,481 INFO L482 AbstractCegarLoop]: Abstraction has 3905 states and 16382 transitions. [2021-06-05 22:40:25,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:25,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 16382 transitions. [2021-06-05 22:40:25,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:25,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:25,486 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:25,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 534 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1166 [2021-06-05 22:40:25,686 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:25,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:25,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1837849269, now seen corresponding path program 380 times [2021-06-05 22:40:25,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:25,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917123116] [2021-06-05 22:40:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:25,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:25,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917123116] [2021-06-05 22:40:25,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917123116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:25,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196068765] [2021-06-05 22:40:25,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:25,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:25,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:25,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:25,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:25,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:25,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:25,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:25,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:25,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:25,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:40:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:25,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196068765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:25,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:25,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:25,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161024774] [2021-06-05 22:40:25,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:25,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:25,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:25,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:26,000 INFO L87 Difference]: Start difference. First operand 3905 states and 16382 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:26,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:26,699 INFO L93 Difference]: Finished difference Result 4162 states and 17371 transitions. [2021-06-05 22:40:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:40:26,699 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:26,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:26,706 INFO L225 Difference]: With dead ends: 4162 [2021-06-05 22:40:26,706 INFO L226 Difference]: Without dead ends: 4141 [2021-06-05 22:40:26,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 618.5ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:40:26,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2021-06-05 22:40:26,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3897. [2021-06-05 22:40:26,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3897 states, 3896 states have (on average 4.19635523613963) internal successors, (16349), 3896 states have internal predecessors, (16349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3897 states to 3897 states and 16349 transitions. [2021-06-05 22:40:26,757 INFO L78 Accepts]: Start accepts. Automaton has 3897 states and 16349 transitions. Word has length 23 [2021-06-05 22:40:26,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:26,757 INFO L482 AbstractCegarLoop]: Abstraction has 3897 states and 16349 transitions. [2021-06-05 22:40:26,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:26,757 INFO L276 IsEmpty]: Start isEmpty. Operand 3897 states and 16349 transitions. [2021-06-05 22:40:26,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:26,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:26,762 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:26,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1168 [2021-06-05 22:40:26,962 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:26,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:26,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1441002921, now seen corresponding path program 381 times [2021-06-05 22:40:26,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:26,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657515989] [2021-06-05 22:40:26,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:27,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:27,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657515989] [2021-06-05 22:40:27,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657515989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:27,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213164620] [2021-06-05 22:40:27,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:27,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:40:27,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:27,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:27,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:27,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:27,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:40:27,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:27,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:27,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:27,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:40:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:27,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213164620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:27,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:27,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:27,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016424142] [2021-06-05 22:40:27,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:27,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:27,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:27,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:27,249 INFO L87 Difference]: Start difference. First operand 3897 states and 16349 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:27,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:27,919 INFO L93 Difference]: Finished difference Result 4278 states and 17840 transitions. [2021-06-05 22:40:27,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:40:27,919 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:27,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:27,927 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 22:40:27,927 INFO L226 Difference]: Without dead ends: 4256 [2021-06-05 22:40:27,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 548.3ms TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:40:27,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4256 states. [2021-06-05 22:40:27,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4256 to 3905. [2021-06-05 22:40:27,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3905 states, 3904 states have (on average 4.196465163934426) internal successors, (16383), 3904 states have internal predecessors, (16383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:27,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 16383 transitions. [2021-06-05 22:40:27,979 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 16383 transitions. Word has length 23 [2021-06-05 22:40:27,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:27,979 INFO L482 AbstractCegarLoop]: Abstraction has 3905 states and 16383 transitions. [2021-06-05 22:40:27,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:27,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 16383 transitions. [2021-06-05 22:40:27,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:27,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:27,985 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:28,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1170 [2021-06-05 22:40:28,185 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:28,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:28,185 INFO L82 PathProgramCache]: Analyzing trace with hash 2026336873, now seen corresponding path program 382 times [2021-06-05 22:40:28,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:28,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925488120] [2021-06-05 22:40:28,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:28,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:28,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925488120] [2021-06-05 22:40:28,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925488120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:28,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907895166] [2021-06-05 22:40:28,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:28,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:28,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:28,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:28,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:28,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:28,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:28,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:28,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:28,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:28,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:40:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:28,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907895166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:28,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:28,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:28,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137678637] [2021-06-05 22:40:28,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:28,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:28,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:28,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:28,487 INFO L87 Difference]: Start difference. First operand 3905 states and 16383 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:29,026 INFO L93 Difference]: Finished difference Result 4265 states and 17753 transitions. [2021-06-05 22:40:29,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:40:29,026 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:29,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:29,033 INFO L225 Difference]: With dead ends: 4265 [2021-06-05 22:40:29,034 INFO L226 Difference]: Without dead ends: 4239 [2021-06-05 22:40:29,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 402.6ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:40:29,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4239 states. [2021-06-05 22:40:29,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4239 to 3909. [2021-06-05 22:40:29,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3909 states, 3908 states have (on average 4.1962640736949846) internal successors, (16399), 3908 states have internal predecessors, (16399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3909 states to 3909 states and 16399 transitions. [2021-06-05 22:40:29,118 INFO L78 Accepts]: Start accepts. Automaton has 3909 states and 16399 transitions. Word has length 23 [2021-06-05 22:40:29,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:29,118 INFO L482 AbstractCegarLoop]: Abstraction has 3909 states and 16399 transitions. [2021-06-05 22:40:29,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:29,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3909 states and 16399 transitions. [2021-06-05 22:40:29,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:29,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:29,123 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:29,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1172,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:29,324 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:29,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:29,324 INFO L82 PathProgramCache]: Analyzing trace with hash -655063689, now seen corresponding path program 383 times [2021-06-05 22:40:29,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:29,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460247424] [2021-06-05 22:40:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:29,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:29,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:29,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460247424] [2021-06-05 22:40:29,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460247424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:29,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361727279] [2021-06-05 22:40:29,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:29,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:40:29,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:29,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:29,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:29,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:29,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:29,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:29,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:29,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:40:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:29,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361727279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:29,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:29,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:29,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143075580] [2021-06-05 22:40:29,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:29,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:29,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:29,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:29,643 INFO L87 Difference]: Start difference. First operand 3909 states and 16399 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:30,534 INFO L93 Difference]: Finished difference Result 4213 states and 17570 transitions. [2021-06-05 22:40:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:40:30,534 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:30,541 INFO L225 Difference]: With dead ends: 4213 [2021-06-05 22:40:30,542 INFO L226 Difference]: Without dead ends: 4192 [2021-06-05 22:40:30,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 807.3ms TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:40:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4192 states. [2021-06-05 22:40:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4192 to 3901. [2021-06-05 22:40:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.196153846153846) internal successors, (16365), 3900 states have internal predecessors, (16365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16365 transitions. [2021-06-05 22:40:30,594 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16365 transitions. Word has length 23 [2021-06-05 22:40:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:30,594 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16365 transitions. [2021-06-05 22:40:30,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:30,595 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16365 transitions. [2021-06-05 22:40:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:30,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:30,600 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:30,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,538 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:30,800 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:30,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:30,800 INFO L82 PathProgramCache]: Analyzing trace with hash -94502465, now seen corresponding path program 384 times [2021-06-05 22:40:30,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:30,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213162896] [2021-06-05 22:40:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:30,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:30,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213162896] [2021-06-05 22:40:30,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213162896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:30,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498935950] [2021-06-05 22:40:30,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:30,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:40:30,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:30,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:30,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:31,052 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:40:31,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 22:40:31,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:40:31,077 INFO L628 ElimStorePlain]: treesize reduction 53, result has 20.9 percent of original size [2021-06-05 22:40:31,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:31,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 22:40:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:31,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498935950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:31,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:31,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:40:31,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347592979] [2021-06-05 22:40:31,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:40:31,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:31,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:40:31,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:40:31,116 INFO L87 Difference]: Start difference. First operand 3901 states and 16365 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:31,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:31,765 INFO L93 Difference]: Finished difference Result 4156 states and 17350 transitions. [2021-06-05 22:40:31,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:40:31,765 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:31,773 INFO L225 Difference]: With dead ends: 4156 [2021-06-05 22:40:31,773 INFO L226 Difference]: Without dead ends: 4133 [2021-06-05 22:40:31,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 421.6ms TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:40:31,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2021-06-05 22:40:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 3897. [2021-06-05 22:40:31,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3897 states, 3896 states have (on average 4.19635523613963) internal successors, (16349), 3896 states have internal predecessors, (16349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3897 states to 3897 states and 16349 transitions. [2021-06-05 22:40:31,826 INFO L78 Accepts]: Start accepts. Automaton has 3897 states and 16349 transitions. Word has length 23 [2021-06-05 22:40:31,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:31,826 INFO L482 AbstractCegarLoop]: Abstraction has 3897 states and 16349 transitions. [2021-06-05 22:40:31,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:31,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3897 states and 16349 transitions. [2021-06-05 22:40:31,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:31,831 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:31,831 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:32,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1176 [2021-06-05 22:40:32,031 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:32,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:32,032 INFO L82 PathProgramCache]: Analyzing trace with hash 577314687, now seen corresponding path program 385 times [2021-06-05 22:40:32,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:32,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749477063] [2021-06-05 22:40:32,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:32,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:32,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749477063] [2021-06-05 22:40:32,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749477063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:32,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661165681] [2021-06-05 22:40:32,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:32,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:32,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:32,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:32,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:40:32,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:32,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:32,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:32,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:40:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:32,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661165681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:32,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:32,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:32,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444467300] [2021-06-05 22:40:32,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:32,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:32,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:32,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:32,338 INFO L87 Difference]: Start difference. First operand 3897 states and 16349 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:32,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:32,990 INFO L93 Difference]: Finished difference Result 4295 states and 17907 transitions. [2021-06-05 22:40:32,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:40:32,991 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:32,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:32,998 INFO L225 Difference]: With dead ends: 4295 [2021-06-05 22:40:32,998 INFO L226 Difference]: Without dead ends: 4273 [2021-06-05 22:40:32,999 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:40:33,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4273 states. [2021-06-05 22:40:33,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4273 to 3905. [2021-06-05 22:40:33,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3905 states, 3904 states have (on average 4.196465163934426) internal successors, (16383), 3904 states have internal predecessors, (16383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:33,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 16383 transitions. [2021-06-05 22:40:33,053 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 16383 transitions. Word has length 23 [2021-06-05 22:40:33,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:33,053 INFO L482 AbstractCegarLoop]: Abstraction has 3905 states and 16383 transitions. [2021-06-05 22:40:33,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:33,053 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 16383 transitions. [2021-06-05 22:40:33,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:33,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:33,058 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:33,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1180,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:33,259 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:33,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:33,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1090841539, now seen corresponding path program 386 times [2021-06-05 22:40:33,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:33,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396446175] [2021-06-05 22:40:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:33,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:33,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396446175] [2021-06-05 22:40:33,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396446175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:33,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885767188] [2021-06-05 22:40:33,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:33,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:33,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:33,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:33,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:33,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:33,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:33,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:33,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:33,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:33,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:40:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:33,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885767188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:33,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:33,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:33,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903849525] [2021-06-05 22:40:33,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:33,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:33,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:33,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:33,555 INFO L87 Difference]: Start difference. First operand 3905 states and 16383 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:34,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:34,122 INFO L93 Difference]: Finished difference Result 4213 states and 17561 transitions. [2021-06-05 22:40:34,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:40:34,123 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:34,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:34,130 INFO L225 Difference]: With dead ends: 4213 [2021-06-05 22:40:34,130 INFO L226 Difference]: Without dead ends: 4188 [2021-06-05 22:40:34,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 538.0ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:40:34,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-06-05 22:40:34,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3909. [2021-06-05 22:40:34,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3909 states, 3908 states have (on average 4.1962640736949846) internal successors, (16399), 3908 states have internal predecessors, (16399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3909 states to 3909 states and 16399 transitions. [2021-06-05 22:40:34,185 INFO L78 Accepts]: Start accepts. Automaton has 3909 states and 16399 transitions. Word has length 23 [2021-06-05 22:40:34,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:34,186 INFO L482 AbstractCegarLoop]: Abstraction has 3909 states and 16399 transitions. [2021-06-05 22:40:34,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:34,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3909 states and 16399 transitions. [2021-06-05 22:40:34,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:34,191 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:34,191 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:34,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1182,541 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:34,391 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:34,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:34,392 INFO L82 PathProgramCache]: Analyzing trace with hash -2128414601, now seen corresponding path program 387 times [2021-06-05 22:40:34,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:34,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695031199] [2021-06-05 22:40:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:34,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:34,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695031199] [2021-06-05 22:40:34,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695031199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:34,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573938455] [2021-06-05 22:40:34,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:34,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:40:34,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:34,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:34,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:34,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:34,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:34,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:34,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:34,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:34,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:40:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:34,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573938455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:34,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:34,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:34,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385268538] [2021-06-05 22:40:34,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:34,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:34,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:34,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:34,685 INFO L87 Difference]: Start difference. First operand 3909 states and 16399 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:35,403 INFO L93 Difference]: Finished difference Result 4215 states and 17580 transitions. [2021-06-05 22:40:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:40:35,403 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:35,410 INFO L225 Difference]: With dead ends: 4215 [2021-06-05 22:40:35,410 INFO L226 Difference]: Without dead ends: 4194 [2021-06-05 22:40:35,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 695.9ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:40:35,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2021-06-05 22:40:35,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 3901. [2021-06-05 22:40:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.196153846153846) internal successors, (16365), 3900 states have internal predecessors, (16365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16365 transitions. [2021-06-05 22:40:35,461 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16365 transitions. Word has length 23 [2021-06-05 22:40:35,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:35,462 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16365 transitions. [2021-06-05 22:40:35,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16365 transitions. [2021-06-05 22:40:35,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:35,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:35,467 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:35,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1184,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:35,667 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:35,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:35,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1957599669, now seen corresponding path program 388 times [2021-06-05 22:40:35,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:35,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96415124] [2021-06-05 22:40:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:35,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:35,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:35,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96415124] [2021-06-05 22:40:35,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96415124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:35,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762580338] [2021-06-05 22:40:35,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:35,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:35,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:35,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:35,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:35,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:35,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:40:35,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:35,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:35,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:35,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:40:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:35,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762580338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:35,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:35,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:35,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771800494] [2021-06-05 22:40:35,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:35,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:35,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:35,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:35,956 INFO L87 Difference]: Start difference. First operand 3901 states and 16365 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:36,414 INFO L93 Difference]: Finished difference Result 4183 states and 17465 transitions. [2021-06-05 22:40:36,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:40:36,414 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:36,421 INFO L225 Difference]: With dead ends: 4183 [2021-06-05 22:40:36,421 INFO L226 Difference]: Without dead ends: 4160 [2021-06-05 22:40:36,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 394.7ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:40:36,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4160 states. [2021-06-05 22:40:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4160 to 3895. [2021-06-05 22:40:36,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 3894 states have (on average 4.196456086286595) internal successors, (16341), 3894 states have internal predecessors, (16341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:36,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 16341 transitions. [2021-06-05 22:40:36,472 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 16341 transitions. Word has length 23 [2021-06-05 22:40:36,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:36,472 INFO L482 AbstractCegarLoop]: Abstraction has 3895 states and 16341 transitions. [2021-06-05 22:40:36,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:36,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 16341 transitions. [2021-06-05 22:40:36,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:36,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:36,477 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:36,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1186,543 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:36,678 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:36,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:36,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1100599921, now seen corresponding path program 389 times [2021-06-05 22:40:36,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:36,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327729169] [2021-06-05 22:40:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:36,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:36,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327729169] [2021-06-05 22:40:36,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327729169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:36,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282378381] [2021-06-05 22:40:36,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:36,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:40:36,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:36,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:36,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:36,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:36,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:40:36,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:36,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:36,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:36,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:40:36,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:36,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282378381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:36,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:36,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:36,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879429476] [2021-06-05 22:40:36,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:36,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:36,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:36,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:36,961 INFO L87 Difference]: Start difference. First operand 3895 states and 16341 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:37,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:37,723 INFO L93 Difference]: Finished difference Result 4664 states and 19376 transitions. [2021-06-05 22:40:37,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:40:37,724 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:37,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:37,732 INFO L225 Difference]: With dead ends: 4664 [2021-06-05 22:40:37,732 INFO L226 Difference]: Without dead ends: 4642 [2021-06-05 22:40:37,732 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 596.5ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:40:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4642 states. [2021-06-05 22:40:37,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4642 to 3899. [2021-06-05 22:40:37,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3898 states have (on average 4.196767573114418) internal successors, (16359), 3898 states have internal predecessors, (16359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:37,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 16359 transitions. [2021-06-05 22:40:37,785 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 16359 transitions. Word has length 23 [2021-06-05 22:40:37,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:37,786 INFO L482 AbstractCegarLoop]: Abstraction has 3899 states and 16359 transitions. [2021-06-05 22:40:37,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:37,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 16359 transitions. [2021-06-05 22:40:37,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:37,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:37,791 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:37,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1188 [2021-06-05 22:40:37,991 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:37,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:37,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1614126773, now seen corresponding path program 390 times [2021-06-05 22:40:37,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:37,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169461078] [2021-06-05 22:40:37,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:38,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:38,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169461078] [2021-06-05 22:40:38,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169461078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:38,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080962804] [2021-06-05 22:40:38,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:38,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:40:38,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:38,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:38,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:38,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:38,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:38,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:38,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:38,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:38,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:40:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:38,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080962804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:38,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:38,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:38,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443633198] [2021-06-05 22:40:38,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:38,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:38,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:38,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:38,289 INFO L87 Difference]: Start difference. First operand 3899 states and 16359 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:38,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:38,904 INFO L93 Difference]: Finished difference Result 4543 states and 18870 transitions. [2021-06-05 22:40:38,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:40:38,904 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:38,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:38,912 INFO L225 Difference]: With dead ends: 4543 [2021-06-05 22:40:38,912 INFO L226 Difference]: Without dead ends: 4518 [2021-06-05 22:40:38,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 538.7ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:40:38,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2021-06-05 22:40:38,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 3903. [2021-06-05 22:40:38,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.196565863659662) internal successors, (16375), 3902 states have internal predecessors, (16375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 16375 transitions. [2021-06-05 22:40:38,966 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 16375 transitions. Word has length 23 [2021-06-05 22:40:38,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:38,966 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 16375 transitions. [2021-06-05 22:40:38,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:38,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 16375 transitions. [2021-06-05 22:40:38,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:38,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:38,972 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:39,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1190 [2021-06-05 22:40:39,172 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:39,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:39,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1605129367, now seen corresponding path program 391 times [2021-06-05 22:40:39,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:39,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608821103] [2021-06-05 22:40:39,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:39,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:39,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608821103] [2021-06-05 22:40:39,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608821103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:39,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653418479] [2021-06-05 22:40:39,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:39,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:39,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:39,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:39,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:39,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:39,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:39,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:39,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:40:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:39,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653418479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:39,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:39,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:39,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788066144] [2021-06-05 22:40:39,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:39,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:39,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:39,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:39,475 INFO L87 Difference]: Start difference. First operand 3903 states and 16375 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:40,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:40,390 INFO L93 Difference]: Finished difference Result 4517 states and 18778 transitions. [2021-06-05 22:40:40,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:40:40,390 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:40,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:40,398 INFO L225 Difference]: With dead ends: 4517 [2021-06-05 22:40:40,398 INFO L226 Difference]: Without dead ends: 4496 [2021-06-05 22:40:40,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 702.0ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:40:40,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4496 states. [2021-06-05 22:40:40,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4496 to 3895. [2021-06-05 22:40:40,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 3894 states have (on average 4.196456086286595) internal successors, (16341), 3894 states have internal predecessors, (16341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:40,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 16341 transitions. [2021-06-05 22:40:40,453 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 16341 transitions. Word has length 23 [2021-06-05 22:40:40,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:40,453 INFO L482 AbstractCegarLoop]: Abstraction has 3895 states and 16341 transitions. [2021-06-05 22:40:40,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:40,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 16341 transitions. [2021-06-05 22:40:40,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:40,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:40,458 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:40,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1192,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:40,658 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:40,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:40,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1510107419, now seen corresponding path program 392 times [2021-06-05 22:40:40,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:40,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024025143] [2021-06-05 22:40:40,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:40,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:40,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024025143] [2021-06-05 22:40:40,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024025143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:40,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028672818] [2021-06-05 22:40:40,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:40,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:40,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:40,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:40,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:40,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:40,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:40:40,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:40,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:40,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:40,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:40:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:40,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028672818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:40,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:40,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:40,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991765337] [2021-06-05 22:40:40,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:40,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:40,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:40,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:40,940 INFO L87 Difference]: Start difference. First operand 3895 states and 16341 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:41,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:41,552 INFO L93 Difference]: Finished difference Result 4588 states and 19032 transitions. [2021-06-05 22:40:41,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:40:41,552 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:41,560 INFO L225 Difference]: With dead ends: 4588 [2021-06-05 22:40:41,560 INFO L226 Difference]: Without dead ends: 4557 [2021-06-05 22:40:41,560 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 428.9ms TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:40:41,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4557 states. [2021-06-05 22:40:41,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4557 to 3893. [2021-06-05 22:40:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3893 states, 3892 states have (on average 4.195015416238438) internal successors, (16327), 3892 states have internal predecessors, (16327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 16327 transitions. [2021-06-05 22:40:41,613 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 16327 transitions. Word has length 23 [2021-06-05 22:40:41,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:41,613 INFO L482 AbstractCegarLoop]: Abstraction has 3893 states and 16327 transitions. [2021-06-05 22:40:41,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 16327 transitions. [2021-06-05 22:40:41,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:41,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:41,618 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:41,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:41,818 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:41,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:41,818 INFO L82 PathProgramCache]: Analyzing trace with hash 2097852741, now seen corresponding path program 393 times [2021-06-05 22:40:41,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:41,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326236715] [2021-06-05 22:40:41,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:41,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:41,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:41,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326236715] [2021-06-05 22:40:41,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326236715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:41,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932361633] [2021-06-05 22:40:41,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:41,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:40:41,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:41,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:41,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:42,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:42,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:42,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:42,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:42,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:42,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:40:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:42,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932361633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:42,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:42,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:42,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471406477] [2021-06-05 22:40:42,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:42,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:42,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:42,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:42,112 INFO L87 Difference]: Start difference. First operand 3893 states and 16327 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:42,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:42,746 INFO L93 Difference]: Finished difference Result 4418 states and 18376 transitions. [2021-06-05 22:40:42,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:40:42,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:42,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:42,754 INFO L225 Difference]: With dead ends: 4418 [2021-06-05 22:40:42,754 INFO L226 Difference]: Without dead ends: 4393 [2021-06-05 22:40:42,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 517.5ms TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:40:42,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4393 states. [2021-06-05 22:40:42,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4393 to 3885. [2021-06-05 22:40:42,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3884 states have (on average 4.196189495365602) internal successors, (16298), 3884 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 16298 transitions. [2021-06-05 22:40:42,805 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 16298 transitions. Word has length 23 [2021-06-05 22:40:42,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:42,805 INFO L482 AbstractCegarLoop]: Abstraction has 3885 states and 16298 transitions. [2021-06-05 22:40:42,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:42,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 16298 transitions. [2021-06-05 22:40:42,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:42,810 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:42,810 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:43,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,548 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:43,011 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:43,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:43,011 INFO L82 PathProgramCache]: Analyzing trace with hash 39821831, now seen corresponding path program 394 times [2021-06-05 22:40:43,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:43,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279838503] [2021-06-05 22:40:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:43,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:43,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279838503] [2021-06-05 22:40:43,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279838503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:43,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30165746] [2021-06-05 22:40:43,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:43,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:43,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:43,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:43,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:43,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:43,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:40:43,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:43,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:43,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:43,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:40:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:43,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30165746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:43,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:43,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:43,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817569887] [2021-06-05 22:40:43,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:43,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:43,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:43,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:43,317 INFO L87 Difference]: Start difference. First operand 3885 states and 16298 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:43,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:43,974 INFO L93 Difference]: Finished difference Result 4472 states and 18609 transitions. [2021-06-05 22:40:43,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:40:43,974 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:43,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:43,982 INFO L225 Difference]: With dead ends: 4472 [2021-06-05 22:40:43,982 INFO L226 Difference]: Without dead ends: 4450 [2021-06-05 22:40:43,982 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 512.9ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:40:43,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2021-06-05 22:40:44,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3893. [2021-06-05 22:40:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3893 states, 3892 states have (on average 4.196300102774923) internal successors, (16332), 3892 states have internal predecessors, (16332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:44,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 16332 transitions. [2021-06-05 22:40:44,034 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 16332 transitions. Word has length 23 [2021-06-05 22:40:44,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:44,034 INFO L482 AbstractCegarLoop]: Abstraction has 3893 states and 16332 transitions. [2021-06-05 22:40:44,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:44,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 16332 transitions. [2021-06-05 22:40:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:44,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:44,040 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:44,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1198,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:44,240 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:44,240 INFO L82 PathProgramCache]: Analyzing trace with hash 553348683, now seen corresponding path program 395 times [2021-06-05 22:40:44,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:44,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863464803] [2021-06-05 22:40:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:44,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:44,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863464803] [2021-06-05 22:40:44,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863464803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:44,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602099492] [2021-06-05 22:40:44,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:44,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:40:44,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:44,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:44,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:44,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:44,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:44,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:44,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:44,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:44,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:40:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:44,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602099492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:44,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:44,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:44,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526933320] [2021-06-05 22:40:44,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:44,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:44,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:44,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:44,541 INFO L87 Difference]: Start difference. First operand 3893 states and 16332 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:45,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:45,148 INFO L93 Difference]: Finished difference Result 4376 states and 18204 transitions. [2021-06-05 22:40:45,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:40:45,148 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:45,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:45,156 INFO L225 Difference]: With dead ends: 4376 [2021-06-05 22:40:45,156 INFO L226 Difference]: Without dead ends: 4351 [2021-06-05 22:40:45,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 558.7ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:40:45,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-06-05 22:40:45,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3897. [2021-06-05 22:40:45,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3897 states, 3896 states have (on average 4.196098562628337) internal successors, (16348), 3896 states have internal predecessors, (16348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3897 states to 3897 states and 16348 transitions. [2021-06-05 22:40:45,207 INFO L78 Accepts]: Start accepts. Automaton has 3897 states and 16348 transitions. Word has length 23 [2021-06-05 22:40:45,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:45,207 INFO L482 AbstractCegarLoop]: Abstraction has 3897 states and 16348 transitions. [2021-06-05 22:40:45,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:45,207 INFO L276 IsEmpty]: Start isEmpty. Operand 3897 states and 16348 transitions. [2021-06-05 22:40:45,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:45,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:45,213 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:45,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1200 [2021-06-05 22:40:45,413 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:45,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:45,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1629059839, now seen corresponding path program 396 times [2021-06-05 22:40:45,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:45,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728250530] [2021-06-05 22:40:45,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:45,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:45,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728250530] [2021-06-05 22:40:45,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728250530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:45,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652483846] [2021-06-05 22:40:45,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:45,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:40:45,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:45,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:45,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:45,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:45,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:45,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:45,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:45,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:45,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:40:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:45,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652483846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:45,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:45,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:45,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906442700] [2021-06-05 22:40:45,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:45,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:45,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:45,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:45,734 INFO L87 Difference]: Start difference. First operand 3897 states and 16348 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:46,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:46,545 INFO L93 Difference]: Finished difference Result 4345 states and 18092 transitions. [2021-06-05 22:40:46,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:40:46,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:46,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:46,553 INFO L225 Difference]: With dead ends: 4345 [2021-06-05 22:40:46,553 INFO L226 Difference]: Without dead ends: 4324 [2021-06-05 22:40:46,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 708.8ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:40:46,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2021-06-05 22:40:46,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 3889. [2021-06-05 22:40:46,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3889 states, 3888 states have (on average 4.195987654320987) internal successors, (16314), 3888 states have internal predecessors, (16314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:46,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3889 states to 3889 states and 16314 transitions. [2021-06-05 22:40:46,603 INFO L78 Accepts]: Start accepts. Automaton has 3889 states and 16314 transitions. Word has length 23 [2021-06-05 22:40:46,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:46,603 INFO L482 AbstractCegarLoop]: Abstraction has 3889 states and 16314 transitions. [2021-06-05 22:40:46,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:46,603 INFO L276 IsEmpty]: Start isEmpty. Operand 3889 states and 16314 transitions. [2021-06-05 22:40:46,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:46,608 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:46,608 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:46,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1202 [2021-06-05 22:40:46,809 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:46,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1799874771, now seen corresponding path program 397 times [2021-06-05 22:40:46,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:46,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876559410] [2021-06-05 22:40:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:46,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:46,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876559410] [2021-06-05 22:40:46,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876559410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:46,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301984441] [2021-06-05 22:40:46,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:46,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:46,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:47,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:47,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:40:47,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:47,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:47,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:47,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:40:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:47,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301984441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:47,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:47,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:47,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100693220] [2021-06-05 22:40:47,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:47,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:47,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:47,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:47,096 INFO L87 Difference]: Start difference. First operand 3889 states and 16314 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:47,568 INFO L93 Difference]: Finished difference Result 4301 states and 17926 transitions. [2021-06-05 22:40:47,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:40:47,568 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:47,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:47,575 INFO L225 Difference]: With dead ends: 4301 [2021-06-05 22:40:47,576 INFO L226 Difference]: Without dead ends: 4278 [2021-06-05 22:40:47,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 411.4ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:40:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-06-05 22:40:47,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3883. [2021-06-05 22:40:47,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3883 states, 3882 states have (on average 4.196805770221535) internal successors, (16292), 3882 states have internal predecessors, (16292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:47,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3883 states to 3883 states and 16292 transitions. [2021-06-05 22:40:47,627 INFO L78 Accepts]: Start accepts. Automaton has 3883 states and 16292 transitions. Word has length 23 [2021-06-05 22:40:47,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:47,628 INFO L482 AbstractCegarLoop]: Abstraction has 3883 states and 16292 transitions. [2021-06-05 22:40:47,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:47,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3883 states and 16292 transitions. [2021-06-05 22:40:47,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:47,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:47,633 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:47,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1204 [2021-06-05 22:40:47,834 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:47,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:47,834 INFO L82 PathProgramCache]: Analyzing trace with hash 879475445, now seen corresponding path program 1 times [2021-06-05 22:40:47,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:47,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205803512] [2021-06-05 22:40:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:47,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:47,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205803512] [2021-06-05 22:40:47,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205803512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:47,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402908315] [2021-06-05 22:40:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:47,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:47,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:48,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:48,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:40:48,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:48,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:48,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:48,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:40:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:48,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402908315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:48,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:48,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:48,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899735809] [2021-06-05 22:40:48,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:48,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:48,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:48,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:48,152 INFO L87 Difference]: Start difference. First operand 3883 states and 16292 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:49,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:49,198 INFO L93 Difference]: Finished difference Result 4622 states and 19202 transitions. [2021-06-05 22:40:49,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:40:49,198 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:49,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:49,206 INFO L225 Difference]: With dead ends: 4622 [2021-06-05 22:40:49,206 INFO L226 Difference]: Without dead ends: 4600 [2021-06-05 22:40:49,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 789.5ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:40:49,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4600 states. [2021-06-05 22:40:49,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4600 to 3903. [2021-06-05 22:40:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.199384930804715) internal successors, (16386), 3902 states have internal predecessors, (16386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:49,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 16386 transitions. [2021-06-05 22:40:49,260 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 16386 transitions. Word has length 23 [2021-06-05 22:40:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:49,260 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 16386 transitions. [2021-06-05 22:40:49,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:49,261 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 16386 transitions. [2021-06-05 22:40:49,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:49,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:49,266 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:49,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1206,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:49,466 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:49,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:49,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1464809397, now seen corresponding path program 2 times [2021-06-05 22:40:49,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:49,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157228163] [2021-06-05 22:40:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:49,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:49,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157228163] [2021-06-05 22:40:49,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157228163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:49,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742519973] [2021-06-05 22:40:49,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:49,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:49,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:49,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:49,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:49,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:49,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:49,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:49,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:49,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:49,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:40:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:49,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742519973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:49,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:49,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:49,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817793494] [2021-06-05 22:40:49,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:49,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:49,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:49,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:49,797 INFO L87 Difference]: Start difference. First operand 3903 states and 16386 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:50,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:50,614 INFO L93 Difference]: Finished difference Result 4476 states and 18602 transitions. [2021-06-05 22:40:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:40:50,614 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:50,622 INFO L225 Difference]: With dead ends: 4476 [2021-06-05 22:40:50,622 INFO L226 Difference]: Without dead ends: 4450 [2021-06-05 22:40:50,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 787.9ms TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:40:50,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2021-06-05 22:40:50,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3907. [2021-06-05 22:40:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 4.199180747567844) internal successors, (16402), 3906 states have internal predecessors, (16402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:50,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 16402 transitions. [2021-06-05 22:40:50,675 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 16402 transitions. Word has length 23 [2021-06-05 22:40:50,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:50,675 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 16402 transitions. [2021-06-05 22:40:50,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:50,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 16402 transitions. [2021-06-05 22:40:50,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:50,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:50,680 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:50,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1208,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:50,881 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:50,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1216591165, now seen corresponding path program 3 times [2021-06-05 22:40:50,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:50,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420221709] [2021-06-05 22:40:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:51,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:51,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420221709] [2021-06-05 22:40:51,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420221709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:51,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455297574] [2021-06-05 22:40:51,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:51,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:40:51,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:51,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:51,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:51,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:51,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:51,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:51,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:51,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:51,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:40:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:51,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455297574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:51,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:51,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:51,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102941187] [2021-06-05 22:40:51,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:51,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:51,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:51,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:51,208 INFO L87 Difference]: Start difference. First operand 3907 states and 16402 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:52,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:52,316 INFO L93 Difference]: Finished difference Result 4476 states and 18602 transitions. [2021-06-05 22:40:52,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:40:52,316 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:52,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:52,324 INFO L225 Difference]: With dead ends: 4476 [2021-06-05 22:40:52,324 INFO L226 Difference]: Without dead ends: 4455 [2021-06-05 22:40:52,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1028.5ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:40:52,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4455 states. [2021-06-05 22:40:52,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4455 to 3899. [2021-06-05 22:40:52,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3898 states have (on average 4.199076449461262) internal successors, (16368), 3898 states have internal predecessors, (16368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:52,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 16368 transitions. [2021-06-05 22:40:52,379 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 16368 transitions. Word has length 23 [2021-06-05 22:40:52,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:52,379 INFO L482 AbstractCegarLoop]: Abstraction has 3899 states and 16368 transitions. [2021-06-05 22:40:52,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:52,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 16368 transitions. [2021-06-05 22:40:52,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:52,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:52,385 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:52,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 555 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-06-05 22:40:52,585 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:52,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:52,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1228972823, now seen corresponding path program 4 times [2021-06-05 22:40:52,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:52,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325227272] [2021-06-05 22:40:52,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:52,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:52,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325227272] [2021-06-05 22:40:52,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325227272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:52,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888044714] [2021-06-05 22:40:52,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:52,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:52,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:52,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:52,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:52,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:52,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:40:52,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:52,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:52,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:52,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:40:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:52,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888044714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:52,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:52,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:52,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157058058] [2021-06-05 22:40:52,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:52,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:52,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:52,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:52,901 INFO L87 Difference]: Start difference. First operand 3899 states and 16368 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:53,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:53,619 INFO L93 Difference]: Finished difference Result 4638 states and 19236 transitions. [2021-06-05 22:40:53,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:40:53,619 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:53,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:53,627 INFO L225 Difference]: With dead ends: 4638 [2021-06-05 22:40:53,627 INFO L226 Difference]: Without dead ends: 4608 [2021-06-05 22:40:53,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 623.0ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:40:53,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4608 states. [2021-06-05 22:40:53,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4608 to 3905. [2021-06-05 22:40:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3905 states, 3904 states have (on average 4.200819672131147) internal successors, (16400), 3904 states have internal predecessors, (16400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:53,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 16400 transitions. [2021-06-05 22:40:53,680 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 16400 transitions. Word has length 23 [2021-06-05 22:40:53,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:53,680 INFO L482 AbstractCegarLoop]: Abstraction has 3905 states and 16400 transitions. [2021-06-05 22:40:53,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:53,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 16400 transitions. [2021-06-05 22:40:53,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:53,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:53,686 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:53,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1212 [2021-06-05 22:40:53,886 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:53,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:53,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1310371879, now seen corresponding path program 5 times [2021-06-05 22:40:53,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:53,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254003061] [2021-06-05 22:40:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:54,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:54,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:54,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254003061] [2021-06-05 22:40:54,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254003061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:54,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195494039] [2021-06-05 22:40:54,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:54,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:40:54,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:54,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:54,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:54,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:54,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:54,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:54,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:54,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:54,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:40:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:54,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195494039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:54,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:54,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:54,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934818675] [2021-06-05 22:40:54,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:54,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:54,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:54,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:54,238 INFO L87 Difference]: Start difference. First operand 3905 states and 16400 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:55,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:55,211 INFO L93 Difference]: Finished difference Result 4456 states and 18531 transitions. [2021-06-05 22:40:55,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:40:55,211 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:55,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:55,219 INFO L225 Difference]: With dead ends: 4456 [2021-06-05 22:40:55,219 INFO L226 Difference]: Without dead ends: 4430 [2021-06-05 22:40:55,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 831.3ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:40:55,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4430 states. [2021-06-05 22:40:55,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4430 to 3909. [2021-06-05 22:40:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3909 states, 3908 states have (on average 4.200614124872057) internal successors, (16416), 3908 states have internal predecessors, (16416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:55,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3909 states to 3909 states and 16416 transitions. [2021-06-05 22:40:55,273 INFO L78 Accepts]: Start accepts. Automaton has 3909 states and 16416 transitions. Word has length 23 [2021-06-05 22:40:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:55,273 INFO L482 AbstractCegarLoop]: Abstraction has 3909 states and 16416 transitions. [2021-06-05 22:40:55,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:55,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3909 states and 16416 transitions. [2021-06-05 22:40:55,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:55,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:55,278 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:55,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1214,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:55,479 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:55,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:55,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1371028683, now seen corresponding path program 6 times [2021-06-05 22:40:55,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:55,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29958289] [2021-06-05 22:40:55,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:55,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:55,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29958289] [2021-06-05 22:40:55,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29958289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:55,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273345531] [2021-06-05 22:40:55,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:55,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:40:55,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:55,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:55,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:55,747 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 22:40:55,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 64 [2021-06-05 22:40:55,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:55,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:55,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:55,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:48 [2021-06-05 22:40:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:55,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273345531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:55,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:55,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:40:55,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761324701] [2021-06-05 22:40:55,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:40:55,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:55,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:40:55,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:40:55,836 INFO L87 Difference]: Start difference. First operand 3909 states and 16416 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:56,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:56,668 INFO L93 Difference]: Finished difference Result 4268 states and 17776 transitions. [2021-06-05 22:40:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:40:56,668 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:56,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:56,675 INFO L225 Difference]: With dead ends: 4268 [2021-06-05 22:40:56,675 INFO L226 Difference]: Without dead ends: 4247 [2021-06-05 22:40:56,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 694.7ms TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:40:56,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-06-05 22:40:56,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3901. [2021-06-05 22:40:56,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.201794871794871) internal successors, (16387), 3900 states have internal predecessors, (16387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:56,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16387 transitions. [2021-06-05 22:40:56,727 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16387 transitions. Word has length 23 [2021-06-05 22:40:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:56,728 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16387 transitions. [2021-06-05 22:40:56,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:56,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16387 transitions. [2021-06-05 22:40:56,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:56,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:56,733 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:56,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1216,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:56,933 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:56,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:56,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1004425269, now seen corresponding path program 7 times [2021-06-05 22:40:56,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:56,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812197976] [2021-06-05 22:40:56,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:57,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:57,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812197976] [2021-06-05 22:40:57,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812197976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:57,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036195107] [2021-06-05 22:40:57,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:57,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:57,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:57,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:57,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:40:57,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:57,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:57,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:57,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:40:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:57,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036195107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:57,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:57,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:57,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223093778] [2021-06-05 22:40:57,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:57,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:57,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:57,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:57,278 INFO L87 Difference]: Start difference. First operand 3901 states and 16387 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:57,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:57,889 INFO L93 Difference]: Finished difference Result 4386 states and 18262 transitions. [2021-06-05 22:40:57,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:40:57,889 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:57,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:57,896 INFO L225 Difference]: With dead ends: 4386 [2021-06-05 22:40:57,896 INFO L226 Difference]: Without dead ends: 4352 [2021-06-05 22:40:57,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 477.2ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:40:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-06-05 22:40:57,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3912. [2021-06-05 22:40:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3911 states have (on average 4.2019943748401944) internal successors, (16434), 3911 states have internal predecessors, (16434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:57,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 16434 transitions. [2021-06-05 22:40:57,947 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 16434 transitions. Word has length 23 [2021-06-05 22:40:57,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:57,947 INFO L482 AbstractCegarLoop]: Abstraction has 3912 states and 16434 transitions. [2021-06-05 22:40:57,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:57,947 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 16434 transitions. [2021-06-05 22:40:57,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:57,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:57,953 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:58,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1220 [2021-06-05 22:40:58,153 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:58,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:58,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1158862787, now seen corresponding path program 8 times [2021-06-05 22:40:58,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:58,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104210954] [2021-06-05 22:40:58,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:58,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:58,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104210954] [2021-06-05 22:40:58,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104210954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:58,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952687788] [2021-06-05 22:40:58,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:58,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:58,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:58,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:58,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:58,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:58,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:40:58,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:58,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:58,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:58,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:40:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:58,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952687788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:58,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:58,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:58,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188057200] [2021-06-05 22:40:58,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:58,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:58,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:58,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:58,473 INFO L87 Difference]: Start difference. First operand 3912 states and 16434 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:59,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:59,182 INFO L93 Difference]: Finished difference Result 4464 states and 18562 transitions. [2021-06-05 22:40:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:40:59,183 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:40:59,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:59,191 INFO L225 Difference]: With dead ends: 4464 [2021-06-05 22:40:59,191 INFO L226 Difference]: Without dead ends: 4434 [2021-06-05 22:40:59,191 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 522.0ms TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:40:59,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4434 states. [2021-06-05 22:40:59,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4434 to 3916. [2021-06-05 22:40:59,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.202298850574713) internal successors, (16452), 3915 states have internal predecessors, (16452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:59,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16452 transitions. [2021-06-05 22:40:59,242 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16452 transitions. Word has length 23 [2021-06-05 22:40:59,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:59,242 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16452 transitions. [2021-06-05 22:40:59,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:59,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16452 transitions. [2021-06-05 22:40:59,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:40:59,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:59,248 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:59,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1222 [2021-06-05 22:40:59,448 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:59,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:59,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1240261843, now seen corresponding path program 9 times [2021-06-05 22:40:59,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:59,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770837315] [2021-06-05 22:40:59,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:59,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:59,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770837315] [2021-06-05 22:40:59,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770837315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:59,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618184656] [2021-06-05 22:40:59,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:59,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:40:59,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:59,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:40:59,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:59,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:59,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:40:59,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:59,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:59,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:59,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:40:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:59,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618184656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:59,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:59,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:40:59,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888411601] [2021-06-05 22:40:59,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:59,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:59,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:59,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:59,804 INFO L87 Difference]: Start difference. First operand 3916 states and 16452 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:00,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:00,553 INFO L93 Difference]: Finished difference Result 4328 states and 18029 transitions. [2021-06-05 22:41:00,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:41:00,553 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:00,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:00,560 INFO L225 Difference]: With dead ends: 4328 [2021-06-05 22:41:00,561 INFO L226 Difference]: Without dead ends: 4302 [2021-06-05 22:41:00,561 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 708.5ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:41:00,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2021-06-05 22:41:00,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 3920. [2021-06-05 22:41:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.20209237050268) internal successors, (16468), 3919 states have internal predecessors, (16468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:00,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16468 transitions. [2021-06-05 22:41:00,610 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16468 transitions. Word has length 23 [2021-06-05 22:41:00,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:00,610 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16468 transitions. [2021-06-05 22:41:00,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:00,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16468 transitions. [2021-06-05 22:41:00,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:00,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:00,615 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:00,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1224,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:00,816 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:00,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:00,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1441138719, now seen corresponding path program 10 times [2021-06-05 22:41:00,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:00,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275632979] [2021-06-05 22:41:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:00,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:00,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275632979] [2021-06-05 22:41:00,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275632979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:00,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865821787] [2021-06-05 22:41:00,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:00,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:00,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:00,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:00,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:01,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:01,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:41:01,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:01,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:01,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:01,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:41:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:01,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865821787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:01,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:01,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:41:01,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120716288] [2021-06-05 22:41:01,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:01,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:01,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:01,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:01,146 INFO L87 Difference]: Start difference. First operand 3920 states and 16468 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:02,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:02,113 INFO L93 Difference]: Finished difference Result 4339 states and 18070 transitions. [2021-06-05 22:41:02,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:41:02,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:02,120 INFO L225 Difference]: With dead ends: 4339 [2021-06-05 22:41:02,121 INFO L226 Difference]: Without dead ends: 4318 [2021-06-05 22:41:02,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 846.9ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:41:02,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4318 states. [2021-06-05 22:41:02,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4318 to 3910. [2021-06-05 22:41:02,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3910 states, 3909 states have (on average 4.202609363008442) internal successors, (16428), 3909 states have internal predecessors, (16428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3910 states to 3910 states and 16428 transitions. [2021-06-05 22:41:02,172 INFO L78 Accepts]: Start accepts. Automaton has 3910 states and 16428 transitions. Word has length 23 [2021-06-05 22:41:02,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:02,173 INFO L482 AbstractCegarLoop]: Abstraction has 3910 states and 16428 transitions. [2021-06-05 22:41:02,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:02,173 INFO L276 IsEmpty]: Start isEmpty. Operand 3910 states and 16428 transitions. [2021-06-05 22:41:02,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:02,178 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:02,178 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:02,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1226 [2021-06-05 22:41:02,378 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:02,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:02,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1998744343, now seen corresponding path program 11 times [2021-06-05 22:41:02,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:02,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127381612] [2021-06-05 22:41:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:02,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:02,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127381612] [2021-06-05 22:41:02,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127381612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:02,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238637333] [2021-06-05 22:41:02,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:02,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:41:02,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:02,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:02,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:02,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:02,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:41:02,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:02,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:02,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:02,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:41:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:02,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238637333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:02,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:02,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:41:02,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939185741] [2021-06-05 22:41:02,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:02,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:02,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:02,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:02,721 INFO L87 Difference]: Start difference. First operand 3910 states and 16428 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:03,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:03,296 INFO L93 Difference]: Finished difference Result 4321 states and 18000 transitions. [2021-06-05 22:41:03,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:41:03,296 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:03,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:03,304 INFO L225 Difference]: With dead ends: 4321 [2021-06-05 22:41:03,304 INFO L226 Difference]: Without dead ends: 4312 [2021-06-05 22:41:03,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 510.7ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:41:03,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2021-06-05 22:41:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 3941. [2021-06-05 22:41:03,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3940 states have (on average 4.20761421319797) internal successors, (16578), 3940 states have internal predecessors, (16578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 16578 transitions. [2021-06-05 22:41:03,358 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 16578 transitions. Word has length 23 [2021-06-05 22:41:03,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:03,359 INFO L482 AbstractCegarLoop]: Abstraction has 3941 states and 16578 transitions. [2021-06-05 22:41:03,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:03,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 16578 transitions. [2021-06-05 22:41:03,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:03,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:03,364 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:03,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1228,563 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:03,564 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:03,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:03,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1381141465, now seen corresponding path program 12 times [2021-06-05 22:41:03,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:03,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279667900] [2021-06-05 22:41:03,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:03,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:03,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279667900] [2021-06-05 22:41:03,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279667900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:03,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63047826] [2021-06-05 22:41:03,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:03,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:41:03,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:03,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:41:03,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:03,854 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-06-05 22:41:03,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 56 [2021-06-05 22:41:03,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:41:03,935 INFO L628 ElimStorePlain]: treesize reduction 61, result has 55.5 percent of original size [2021-06-05 22:41:03,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:03,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:76 [2021-06-05 22:41:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:04,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63047826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:04,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:04,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:04,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815119552] [2021-06-05 22:41:04,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:04,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:04,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:04,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:04,053 INFO L87 Difference]: Start difference. First operand 3941 states and 16578 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:04,307 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-06-05 22:41:04,474 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-06-05 22:41:05,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:05,178 INFO L93 Difference]: Finished difference Result 4315 states and 18017 transitions. [2021-06-05 22:41:05,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:41:05,178 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:05,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:05,186 INFO L225 Difference]: With dead ends: 4315 [2021-06-05 22:41:05,186 INFO L226 Difference]: Without dead ends: 4306 [2021-06-05 22:41:05,186 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 914.9ms TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:41:05,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2021-06-05 22:41:05,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 3945. [2021-06-05 22:41:05,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3944 states have (on average 4.2074036511156185) internal successors, (16594), 3944 states have internal predecessors, (16594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 16594 transitions. [2021-06-05 22:41:05,258 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 16594 transitions. Word has length 23 [2021-06-05 22:41:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:05,258 INFO L482 AbstractCegarLoop]: Abstraction has 3945 states and 16594 transitions. [2021-06-05 22:41:05,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:05,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 16594 transitions. [2021-06-05 22:41:05,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:05,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:05,263 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:05,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1230,564 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:05,464 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:05,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:05,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1226703947, now seen corresponding path program 13 times [2021-06-05 22:41:05,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:05,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758157609] [2021-06-05 22:41:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:05,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:05,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758157609] [2021-06-05 22:41:05,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758157609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:05,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328461908] [2021-06-05 22:41:05,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:05,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:05,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:05,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:05,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:41:05,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:05,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:05,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:05,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:41:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:05,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328461908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:05,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:05,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:41:05,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663611872] [2021-06-05 22:41:05,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:05,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:05,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:05,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:05,799 INFO L87 Difference]: Start difference. First operand 3945 states and 16594 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:06,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:06,527 INFO L93 Difference]: Finished difference Result 4385 states and 18284 transitions. [2021-06-05 22:41:06,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:41:06,527 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:06,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:06,535 INFO L225 Difference]: With dead ends: 4385 [2021-06-05 22:41:06,535 INFO L226 Difference]: Without dead ends: 4376 [2021-06-05 22:41:06,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 587.3ms TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:41:06,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2021-06-05 22:41:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 3968. [2021-06-05 22:41:06,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 4.206705318880767) internal successors, (16688), 3967 states have internal predecessors, (16688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 16688 transitions. [2021-06-05 22:41:06,587 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 16688 transitions. Word has length 23 [2021-06-05 22:41:06,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:06,587 INFO L482 AbstractCegarLoop]: Abstraction has 3968 states and 16688 transitions. [2021-06-05 22:41:06,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:06,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 16688 transitions. [2021-06-05 22:41:06,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:06,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:06,593 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:06,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1235,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:06,793 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:06,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:06,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1145304891, now seen corresponding path program 14 times [2021-06-05 22:41:06,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:06,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262068360] [2021-06-05 22:41:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:06,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:06,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262068360] [2021-06-05 22:41:06,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262068360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:06,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556123308] [2021-06-05 22:41:06,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:06,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:06,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:06,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:06,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:07,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:07,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:41:07,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:07,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:07,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:07,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:41:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:07,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556123308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:07,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:07,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:41:07,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909459495] [2021-06-05 22:41:07,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:07,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:07,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:07,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:07,120 INFO L87 Difference]: Start difference. First operand 3968 states and 16688 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:08,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:08,108 INFO L93 Difference]: Finished difference Result 4260 states and 17798 transitions. [2021-06-05 22:41:08,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:41:08,108 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:08,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:08,115 INFO L225 Difference]: With dead ends: 4260 [2021-06-05 22:41:08,115 INFO L226 Difference]: Without dead ends: 4251 [2021-06-05 22:41:08,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 799.3ms TimeCoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:41:08,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-05 22:41:08,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3972. [2021-06-05 22:41:08,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3972 states, 3971 states have (on average 4.206497104004029) internal successors, (16704), 3971 states have internal predecessors, (16704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3972 states to 3972 states and 16704 transitions. [2021-06-05 22:41:08,168 INFO L78 Accepts]: Start accepts. Automaton has 3972 states and 16704 transitions. Word has length 23 [2021-06-05 22:41:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:08,168 INFO L482 AbstractCegarLoop]: Abstraction has 3972 states and 16704 transitions. [2021-06-05 22:41:08,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:08,168 INFO L276 IsEmpty]: Start isEmpty. Operand 3972 states and 16704 transitions. [2021-06-05 22:41:08,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:08,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:08,173 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:08,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1237 [2021-06-05 22:41:08,374 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:08,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:08,374 INFO L82 PathProgramCache]: Analyzing trace with hash 468261843, now seen corresponding path program 15 times [2021-06-05 22:41:08,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:08,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849420730] [2021-06-05 22:41:08,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:08,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:08,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849420730] [2021-06-05 22:41:08,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849420730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:08,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060419127] [2021-06-05 22:41:08,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:08,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:41:08,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:08,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:08,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:08,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:08,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:41:08,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:08,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:08,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:08,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:41:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:08,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060419127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:08,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:08,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:41:08,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614595197] [2021-06-05 22:41:08,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:08,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:08,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:08,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:08,701 INFO L87 Difference]: Start difference. First operand 3972 states and 16704 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:09,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:09,753 INFO L93 Difference]: Finished difference Result 4233 states and 17674 transitions. [2021-06-05 22:41:09,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:41:09,753 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:09,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:09,760 INFO L225 Difference]: With dead ends: 4233 [2021-06-05 22:41:09,760 INFO L226 Difference]: Without dead ends: 4222 [2021-06-05 22:41:09,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 891.9ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:41:09,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2021-06-05 22:41:09,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 3968. [2021-06-05 22:41:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 4.206705318880767) internal successors, (16688), 3967 states have internal predecessors, (16688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:09,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 16688 transitions. [2021-06-05 22:41:09,813 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 16688 transitions. Word has length 23 [2021-06-05 22:41:09,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:09,813 INFO L482 AbstractCegarLoop]: Abstraction has 3968 states and 16688 transitions. [2021-06-05 22:41:09,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:09,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 16688 transitions. [2021-06-05 22:41:09,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:09,819 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:09,819 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:10,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1239,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:10,019 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:10,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:10,019 INFO L82 PathProgramCache]: Analyzing trace with hash 570192243, now seen corresponding path program 1 times [2021-06-05 22:41:10,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:10,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945729345] [2021-06-05 22:41:10,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:10,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:10,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945729345] [2021-06-05 22:41:10,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945729345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:10,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067705394] [2021-06-05 22:41:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:10,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:10,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:10,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:10,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:41:10,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:10,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:10,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:10,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:41:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:10,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067705394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:10,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:10,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 22:41:10,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184399350] [2021-06-05 22:41:10,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:10,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:10,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:10,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:10,319 INFO L87 Difference]: Start difference. First operand 3968 states and 16688 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:11,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:11,112 INFO L93 Difference]: Finished difference Result 5405 states and 22414 transitions. [2021-06-05 22:41:11,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:41:11,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:11,122 INFO L225 Difference]: With dead ends: 5405 [2021-06-05 22:41:11,122 INFO L226 Difference]: Without dead ends: 5361 [2021-06-05 22:41:11,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 550.4ms TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:41:11,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2021-06-05 22:41:11,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 4028. [2021-06-05 22:41:11,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4028 states, 4027 states have (on average 4.215545070772287) internal successors, (16976), 4027 states have internal predecessors, (16976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:11,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 16976 transitions. [2021-06-05 22:41:11,182 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 16976 transitions. Word has length 23 [2021-06-05 22:41:11,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:11,182 INFO L482 AbstractCegarLoop]: Abstraction has 4028 states and 16976 transitions. [2021-06-05 22:41:11,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:11,182 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 16976 transitions. [2021-06-05 22:41:11,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:11,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:11,187 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:11,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:11,388 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:11,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1155526195, now seen corresponding path program 2 times [2021-06-05 22:41:11,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:11,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268899845] [2021-06-05 22:41:11,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:41:11,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:11,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268899845] [2021-06-05 22:41:11,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268899845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:11,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764012957] [2021-06-05 22:41:11,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:11,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:11,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:11,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:11,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:11,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:11,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:41:11,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:11,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:11,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:11,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:41:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:11,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764012957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:11,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:11,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 22:41:11,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942519095] [2021-06-05 22:41:11,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:11,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:11,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:11,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:11,720 INFO L87 Difference]: Start difference. First operand 4028 states and 16976 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:12,611 INFO L93 Difference]: Finished difference Result 5250 states and 21765 transitions. [2021-06-05 22:41:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:41:12,612 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:12,621 INFO L225 Difference]: With dead ends: 5250 [2021-06-05 22:41:12,621 INFO L226 Difference]: Without dead ends: 5198 [2021-06-05 22:41:12,621 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 691.3ms TimeCoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:41:12,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5198 states. [2021-06-05 22:41:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5198 to 4094. [2021-06-05 22:41:12,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4094 states, 4093 states have (on average 4.219643293427803) internal successors, (17271), 4093 states have internal predecessors, (17271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:12,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4094 states to 4094 states and 17271 transitions. [2021-06-05 22:41:12,679 INFO L78 Accepts]: Start accepts. Automaton has 4094 states and 17271 transitions. Word has length 23 [2021-06-05 22:41:12,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:12,680 INFO L482 AbstractCegarLoop]: Abstraction has 4094 states and 17271 transitions. [2021-06-05 22:41:12,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:12,680 INFO L276 IsEmpty]: Start isEmpty. Operand 4094 states and 17271 transitions. [2021-06-05 22:41:12,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:12,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:12,685 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:12,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1243 [2021-06-05 22:41:12,886 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:12,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:12,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1525874367, now seen corresponding path program 3 times [2021-06-05 22:41:12,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:12,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168069242] [2021-06-05 22:41:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:41:12,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:12,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168069242] [2021-06-05 22:41:12,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168069242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:12,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394296256] [2021-06-05 22:41:12,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:13,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:41:13,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:13,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:13,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:13,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:13,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:41:13,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:13,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:13,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:13,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:41:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:13,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394296256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:13,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:13,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 22:41:13,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150570352] [2021-06-05 22:41:13,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:13,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:13,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:13,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:13,201 INFO L87 Difference]: Start difference. First operand 4094 states and 17271 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:13,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:13,966 INFO L93 Difference]: Finished difference Result 5166 states and 21474 transitions. [2021-06-05 22:41:13,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:41:13,967 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:13,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:13,976 INFO L225 Difference]: With dead ends: 5166 [2021-06-05 22:41:13,976 INFO L226 Difference]: Without dead ends: 5124 [2021-06-05 22:41:13,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 648.6ms TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:41:13,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5124 states. [2021-06-05 22:41:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5124 to 4146. [2021-06-05 22:41:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4146 states, 4145 states have (on average 4.222677925211098) internal successors, (17503), 4145 states have internal predecessors, (17503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:14,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4146 states to 4146 states and 17503 transitions. [2021-06-05 22:41:14,034 INFO L78 Accepts]: Start accepts. Automaton has 4146 states and 17503 transitions. Word has length 23 [2021-06-05 22:41:14,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:14,034 INFO L482 AbstractCegarLoop]: Abstraction has 4146 states and 17503 transitions. [2021-06-05 22:41:14,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:14,035 INFO L276 IsEmpty]: Start isEmpty. Operand 4146 states and 17503 transitions. [2021-06-05 22:41:14,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:14,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:14,040 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:14,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 570 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1245 [2021-06-05 22:41:14,241 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:14,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:14,241 INFO L82 PathProgramCache]: Analyzing trace with hash 919689621, now seen corresponding path program 4 times [2021-06-05 22:41:14,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:14,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931560444] [2021-06-05 22:41:14,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:41:14,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:14,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931560444] [2021-06-05 22:41:14,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931560444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:14,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805534448] [2021-06-05 22:41:14,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:14,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:14,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:14,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:14,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:14,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:14,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:41:14,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:14,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:14,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:14,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:41:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:14,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805534448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:14,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:14,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 22:41:14,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016030060] [2021-06-05 22:41:14,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:14,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:14,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:14,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:14,532 INFO L87 Difference]: Start difference. First operand 4146 states and 17503 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:15,371 INFO L93 Difference]: Finished difference Result 5533 states and 22929 transitions. [2021-06-05 22:41:15,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:41:15,371 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:15,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:15,381 INFO L225 Difference]: With dead ends: 5533 [2021-06-05 22:41:15,381 INFO L226 Difference]: Without dead ends: 5472 [2021-06-05 22:41:15,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 612.4ms TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:41:15,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5472 states. [2021-06-05 22:41:15,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5472 to 4158. [2021-06-05 22:41:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4158 states, 4157 states have (on average 4.223237911955738) internal successors, (17556), 4157 states have internal predecessors, (17556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4158 states to 4158 states and 17556 transitions. [2021-06-05 22:41:15,442 INFO L78 Accepts]: Start accepts. Automaton has 4158 states and 17556 transitions. Word has length 23 [2021-06-05 22:41:15,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:15,442 INFO L482 AbstractCegarLoop]: Abstraction has 4158 states and 17556 transitions. [2021-06-05 22:41:15,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:15,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4158 states and 17556 transitions. [2021-06-05 22:41:15,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:15,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:15,448 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:15,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1247 [2021-06-05 22:41:15,649 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:15,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:15,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1001088677, now seen corresponding path program 5 times [2021-06-05 22:41:15,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:15,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52645346] [2021-06-05 22:41:15,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:41:15,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:15,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52645346] [2021-06-05 22:41:15,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52645346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:15,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690863393] [2021-06-05 22:41:15,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:15,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:41:15,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:15,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:15,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:15,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:15,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:41:15,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:15,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:15,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:15,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 22:41:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:15,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690863393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:15,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:15,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 22:41:15,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15736662] [2021-06-05 22:41:15,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:15,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:15,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:15,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:15,949 INFO L87 Difference]: Start difference. First operand 4158 states and 17556 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:16,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:16,774 INFO L93 Difference]: Finished difference Result 4985 states and 20747 transitions. [2021-06-05 22:41:16,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:41:16,774 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:16,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:16,783 INFO L225 Difference]: With dead ends: 4985 [2021-06-05 22:41:16,783 INFO L226 Difference]: Without dead ends: 4933 [2021-06-05 22:41:16,783 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 532.7ms TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:41:16,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4933 states. [2021-06-05 22:41:16,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4933 to 4160. [2021-06-05 22:41:16,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4160 states, 4159 states have (on average 4.224092329886992) internal successors, (17568), 4159 states have internal predecessors, (17568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4160 states to 4160 states and 17568 transitions. [2021-06-05 22:41:16,840 INFO L78 Accepts]: Start accepts. Automaton has 4160 states and 17568 transitions. Word has length 23 [2021-06-05 22:41:16,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:16,840 INFO L482 AbstractCegarLoop]: Abstraction has 4160 states and 17568 transitions. [2021-06-05 22:41:16,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 4160 states and 17568 transitions. [2021-06-05 22:41:16,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:16,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:16,846 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:17,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1249 [2021-06-05 22:41:17,046 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:17,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1680311885, now seen corresponding path program 6 times [2021-06-05 22:41:17,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:17,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519031367] [2021-06-05 22:41:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:41:17,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:17,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519031367] [2021-06-05 22:41:17,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519031367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:17,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986854105] [2021-06-05 22:41:17,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:17,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:41:17,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:17,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:17,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:17,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:17,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:41:17,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:17,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:17,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:17,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:41:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:17,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986854105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:17,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:17,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 22:41:17,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678133170] [2021-06-05 22:41:17,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:17,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:17,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:17,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:17,363 INFO L87 Difference]: Start difference. First operand 4160 states and 17568 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:18,111 INFO L93 Difference]: Finished difference Result 5108 states and 21253 transitions. [2021-06-05 22:41:18,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:41:18,111 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:18,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:18,121 INFO L225 Difference]: With dead ends: 5108 [2021-06-05 22:41:18,121 INFO L226 Difference]: Without dead ends: 5066 [2021-06-05 22:41:18,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 605.1ms TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:41:18,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2021-06-05 22:41:18,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 4164. [2021-06-05 22:41:18,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4164 states, 4163 states have (on average 4.223877011770358) internal successors, (17584), 4163 states have internal predecessors, (17584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:18,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4164 states to 4164 states and 17584 transitions. [2021-06-05 22:41:18,179 INFO L78 Accepts]: Start accepts. Automaton has 4164 states and 17584 transitions. Word has length 23 [2021-06-05 22:41:18,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:18,179 INFO L482 AbstractCegarLoop]: Abstraction has 4164 states and 17584 transitions. [2021-06-05 22:41:18,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 4164 states and 17584 transitions. [2021-06-05 22:41:18,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:18,184 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:18,184 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:18,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1250,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:18,385 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:18,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:18,385 INFO L82 PathProgramCache]: Analyzing trace with hash 413446001, now seen corresponding path program 1 times [2021-06-05 22:41:18,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:18,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677887055] [2021-06-05 22:41:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:18,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:18,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677887055] [2021-06-05 22:41:18,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677887055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:18,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049790770] [2021-06-05 22:41:18,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:18,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:18,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:18,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:18,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:41:18,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:18,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:18,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:18,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:41:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:18,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049790770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:18,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:18,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 22:41:18,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754925528] [2021-06-05 22:41:18,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:18,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:18,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:18,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:18,699 INFO L87 Difference]: Start difference. First operand 4164 states and 17584 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:19,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:19,475 INFO L93 Difference]: Finished difference Result 5900 states and 24455 transitions. [2021-06-05 22:41:19,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:41:19,475 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:19,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:19,485 INFO L225 Difference]: With dead ends: 5900 [2021-06-05 22:41:19,485 INFO L226 Difference]: Without dead ends: 5852 [2021-06-05 22:41:19,486 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 578.9ms TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:41:19,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5852 states. [2021-06-05 22:41:19,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5852 to 4252. [2021-06-05 22:41:19,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4252 states, 4251 states have (on average 4.235474006116208) internal successors, (18005), 4251 states have internal predecessors, (18005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:19,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4252 states to 4252 states and 18005 transitions. [2021-06-05 22:41:19,553 INFO L78 Accepts]: Start accepts. Automaton has 4252 states and 18005 transitions. Word has length 23 [2021-06-05 22:41:19,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:19,553 INFO L482 AbstractCegarLoop]: Abstraction has 4252 states and 18005 transitions. [2021-06-05 22:41:19,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:19,554 INFO L276 IsEmpty]: Start isEmpty. Operand 4252 states and 18005 transitions. [2021-06-05 22:41:19,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:19,559 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:19,560 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:19,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1252,574 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:19,760 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:19,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:19,760 INFO L82 PathProgramCache]: Analyzing trace with hash 926972853, now seen corresponding path program 2 times [2021-06-05 22:41:19,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:19,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616677285] [2021-06-05 22:41:19,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:41:19,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:19,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616677285] [2021-06-05 22:41:19,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616677285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:19,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465619588] [2021-06-05 22:41:19,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:19,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:19,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:19,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:19,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:19,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:19,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:41:19,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:19,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:19,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:19,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:41:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:20,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465619588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:20,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:20,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 22:41:20,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200824357] [2021-06-05 22:41:20,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:20,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:20,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:20,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:20,071 INFO L87 Difference]: Start difference. First operand 4252 states and 18005 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:20,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:20,777 INFO L93 Difference]: Finished difference Result 5525 states and 23009 transitions. [2021-06-05 22:41:20,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:41:20,778 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:20,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:20,787 INFO L225 Difference]: With dead ends: 5525 [2021-06-05 22:41:20,787 INFO L226 Difference]: Without dead ends: 5469 [2021-06-05 22:41:20,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 624.6ms TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:41:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5469 states. [2021-06-05 22:41:20,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5469 to 4336. [2021-06-05 22:41:20,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4336 states, 4335 states have (on average 4.242214532871972) internal successors, (18390), 4335 states have internal predecessors, (18390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:20,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4336 states to 4336 states and 18390 transitions. [2021-06-05 22:41:20,849 INFO L78 Accepts]: Start accepts. Automaton has 4336 states and 18390 transitions. Word has length 23 [2021-06-05 22:41:20,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:20,849 INFO L482 AbstractCegarLoop]: Abstraction has 4336 states and 18390 transitions. [2021-06-05 22:41:20,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:20,849 INFO L276 IsEmpty]: Start isEmpty. Operand 4336 states and 18390 transitions. [2021-06-05 22:41:20,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:20,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:20,855 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:21,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 575 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1254 [2021-06-05 22:41:21,055 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:21,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:21,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2002684009, now seen corresponding path program 3 times [2021-06-05 22:41:21,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:21,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520704926] [2021-06-05 22:41:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:41:21,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:21,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520704926] [2021-06-05 22:41:21,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520704926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:21,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769662183] [2021-06-05 22:41:21,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:21,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:41:21,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:21,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:41:21,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:21,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:21,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:41:21,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:21,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:21,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:21,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 22:41:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:21,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769662183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:21,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:21,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 22:41:21,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115594939] [2021-06-05 22:41:21,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:21,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:21,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:21,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:21,354 INFO L87 Difference]: Start difference. First operand 4336 states and 18390 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:22,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:22,092 INFO L93 Difference]: Finished difference Result 5447 states and 22729 transitions. [2021-06-05 22:41:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:41:22,092 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:22,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:22,101 INFO L225 Difference]: With dead ends: 5447 [2021-06-05 22:41:22,101 INFO L226 Difference]: Without dead ends: 5401 [2021-06-05 22:41:22,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 545.3ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:41:22,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-05 22:41:22,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4412. [2021-06-05 22:41:22,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4412 states, 4411 states have (on average 4.2443890274314215) internal successors, (18722), 4411 states have internal predecessors, (18722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:22,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4412 states to 4412 states and 18722 transitions. [2021-06-05 22:41:22,164 INFO L78 Accepts]: Start accepts. Automaton has 4412 states and 18722 transitions. Word has length 23 [2021-06-05 22:41:22,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:22,164 INFO L482 AbstractCegarLoop]: Abstraction has 4412 states and 18722 transitions. [2021-06-05 22:41:22,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand 4412 states and 18722 transitions. [2021-06-05 22:41:22,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:22,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:22,171 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:22,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1256 [2021-06-05 22:41:22,371 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:22,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:22,371 INFO L82 PathProgramCache]: Analyzing trace with hash 822953499, now seen corresponding path program 4 times [2021-06-05 22:41:22,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:22,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028281264] [2021-06-05 22:41:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:41:22,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:22,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028281264] [2021-06-05 22:41:22,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028281264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:22,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383000072] [2021-06-05 22:41:22,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:22,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:22,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:22,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:22,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:22,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:22,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:41:22,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:22,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:22,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:22,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:41:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:22,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383000072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:22,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:22,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 22:41:22,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424128694] [2021-06-05 22:41:22,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:22,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:22,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:22,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:22,662 INFO L87 Difference]: Start difference. First operand 4412 states and 18722 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:23,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:23,398 INFO L93 Difference]: Finished difference Result 5663 states and 23581 transitions. [2021-06-05 22:41:23,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:41:23,398 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:23,408 INFO L225 Difference]: With dead ends: 5663 [2021-06-05 22:41:23,408 INFO L226 Difference]: Without dead ends: 5597 [2021-06-05 22:41:23,408 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 496.0ms TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:41:23,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5597 states. [2021-06-05 22:41:23,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5597 to 4457. [2021-06-05 22:41:23,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4457 states, 4456 states have (on average 4.248204667863555) internal successors, (18930), 4456 states have internal predecessors, (18930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:23,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4457 states to 4457 states and 18930 transitions. [2021-06-05 22:41:23,471 INFO L78 Accepts]: Start accepts. Automaton has 4457 states and 18930 transitions. Word has length 23 [2021-06-05 22:41:23,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:23,471 INFO L482 AbstractCegarLoop]: Abstraction has 4457 states and 18930 transitions. [2021-06-05 22:41:23,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:23,471 INFO L276 IsEmpty]: Start isEmpty. Operand 4457 states and 18930 transitions. [2021-06-05 22:41:23,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:23,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:23,477 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:23,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 577 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-06-05 22:41:23,678 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:23,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:23,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1410698821, now seen corresponding path program 5 times [2021-06-05 22:41:23,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:23,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32501162] [2021-06-05 22:41:23,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:41:23,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:23,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32501162] [2021-06-05 22:41:23,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32501162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:23,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890286026] [2021-06-05 22:41:23,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:23,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:41:23,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:23,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:41:23,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:23,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:23,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 22:41:23,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:23,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:23,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:23,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:12 [2021-06-05 22:41:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:23,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890286026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:23,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:23,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:41:23,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779558601] [2021-06-05 22:41:23,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:41:23,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:23,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:41:23,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:41:23,969 INFO L87 Difference]: Start difference. First operand 4457 states and 18930 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:24,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:24,678 INFO L93 Difference]: Finished difference Result 5357 states and 22443 transitions. [2021-06-05 22:41:24,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:41:24,678 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:24,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:24,688 INFO L225 Difference]: With dead ends: 5357 [2021-06-05 22:41:24,688 INFO L226 Difference]: Without dead ends: 5329 [2021-06-05 22:41:24,688 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 440.2ms TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:41:24,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2021-06-05 22:41:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 4501. [2021-06-05 22:41:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4501 states, 4500 states have (on average 4.2508888888888885) internal successors, (19129), 4500 states have internal predecessors, (19129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:24,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 19129 transitions. [2021-06-05 22:41:24,752 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 19129 transitions. Word has length 23 [2021-06-05 22:41:24,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:24,752 INFO L482 AbstractCegarLoop]: Abstraction has 4501 states and 19129 transitions. [2021-06-05 22:41:24,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:24,753 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 19129 transitions. [2021-06-05 22:41:24,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:24,759 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:24,759 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:24,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1259 [2021-06-05 22:41:24,959 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:24,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:24,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1808557319, now seen corresponding path program 6 times [2021-06-05 22:41:24,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:24,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059903537] [2021-06-05 22:41:24,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:41:25,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:25,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059903537] [2021-06-05 22:41:25,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059903537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:25,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982419014] [2021-06-05 22:41:25,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:25,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:41:25,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:25,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:25,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:25,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:25,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:41:25,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:25,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:25,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:25,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:41:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:25,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982419014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:25,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:25,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 22:41:25,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369692] [2021-06-05 22:41:25,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:25,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:25,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:25,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:25,277 INFO L87 Difference]: Start difference. First operand 4501 states and 19129 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:26,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:26,083 INFO L93 Difference]: Finished difference Result 5494 states and 22980 transitions. [2021-06-05 22:41:26,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:41:26,084 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:26,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:26,094 INFO L225 Difference]: With dead ends: 5494 [2021-06-05 22:41:26,094 INFO L226 Difference]: Without dead ends: 5448 [2021-06-05 22:41:26,094 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 598.7ms TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:41:26,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5448 states. [2021-06-05 22:41:26,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5448 to 4547. [2021-06-05 22:41:26,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4547 states, 4546 states have (on average 4.251869775626925) internal successors, (19329), 4546 states have internal predecessors, (19329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:26,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4547 states to 4547 states and 19329 transitions. [2021-06-05 22:41:26,159 INFO L78 Accepts]: Start accepts. Automaton has 4547 states and 19329 transitions. Word has length 23 [2021-06-05 22:41:26,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:26,159 INFO L482 AbstractCegarLoop]: Abstraction has 4547 states and 19329 transitions. [2021-06-05 22:41:26,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:26,159 INFO L276 IsEmpty]: Start isEmpty. Operand 4547 states and 19329 transitions. [2021-06-05 22:41:26,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:26,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:26,165 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:26,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1262,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:26,366 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:26,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:26,366 INFO L82 PathProgramCache]: Analyzing trace with hash 601928087, now seen corresponding path program 7 times [2021-06-05 22:41:26,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:26,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177858470] [2021-06-05 22:41:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:26,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:26,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177858470] [2021-06-05 22:41:26,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177858470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:26,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314833465] [2021-06-05 22:41:26,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:26,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:26,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:26,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:26,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:41:26,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:26,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:26,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:26,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:41:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:26,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314833465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:26,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:26,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:26,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378205] [2021-06-05 22:41:26,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:26,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:26,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:26,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:26,678 INFO L87 Difference]: Start difference. First operand 4547 states and 19329 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:27,681 INFO L93 Difference]: Finished difference Result 5474 states and 22929 transitions. [2021-06-05 22:41:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:41:27,682 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:27,692 INFO L225 Difference]: With dead ends: 5474 [2021-06-05 22:41:27,692 INFO L226 Difference]: Without dead ends: 5440 [2021-06-05 22:41:27,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 861.3ms TimeCoverageRelationStatistics Valid=214, Invalid=1268, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:41:27,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5440 states. [2021-06-05 22:41:27,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5440 to 4568. [2021-06-05 22:41:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4568 states, 4567 states have (on average 4.253558134442741) internal successors, (19426), 4567 states have internal predecessors, (19426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:27,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4568 states to 4568 states and 19426 transitions. [2021-06-05 22:41:27,756 INFO L78 Accepts]: Start accepts. Automaton has 4568 states and 19426 transitions. Word has length 23 [2021-06-05 22:41:27,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:27,756 INFO L482 AbstractCegarLoop]: Abstraction has 4568 states and 19426 transitions. [2021-06-05 22:41:27,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:27,756 INFO L276 IsEmpty]: Start isEmpty. Operand 4568 states and 19426 transitions. [2021-06-05 22:41:27,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:27,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:27,763 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:27,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1264 [2021-06-05 22:41:27,963 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:27,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:27,963 INFO L82 PathProgramCache]: Analyzing trace with hash -726769333, now seen corresponding path program 8 times [2021-06-05 22:41:27,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:27,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871395690] [2021-06-05 22:41:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:28,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:28,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871395690] [2021-06-05 22:41:28,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871395690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:28,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107738841] [2021-06-05 22:41:28,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:28,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:28,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:28,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:28,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:28,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:28,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:41:28,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:28,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:28,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:28,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:41:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:28,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107738841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:28,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:28,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:28,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463789444] [2021-06-05 22:41:28,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:28,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:28,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:28,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:28,269 INFO L87 Difference]: Start difference. First operand 4568 states and 19426 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:29,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:29,121 INFO L93 Difference]: Finished difference Result 5696 states and 23793 transitions. [2021-06-05 22:41:29,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:41:29,121 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:29,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:29,131 INFO L225 Difference]: With dead ends: 5696 [2021-06-05 22:41:29,131 INFO L226 Difference]: Without dead ends: 5634 [2021-06-05 22:41:29,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 647.4ms TimeCoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:41:29,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5634 states. [2021-06-05 22:41:29,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5634 to 4568. [2021-06-05 22:41:29,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4568 states, 4567 states have (on average 4.253558134442741) internal successors, (19426), 4567 states have internal predecessors, (19426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:29,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4568 states to 4568 states and 19426 transitions. [2021-06-05 22:41:29,196 INFO L78 Accepts]: Start accepts. Automaton has 4568 states and 19426 transitions. Word has length 23 [2021-06-05 22:41:29,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:29,197 INFO L482 AbstractCegarLoop]: Abstraction has 4568 states and 19426 transitions. [2021-06-05 22:41:29,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:29,197 INFO L276 IsEmpty]: Start isEmpty. Operand 4568 states and 19426 transitions. [2021-06-05 22:41:29,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:29,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:29,203 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:29,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1266,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:29,403 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:29,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:29,403 INFO L82 PathProgramCache]: Analyzing trace with hash -139024011, now seen corresponding path program 9 times [2021-06-05 22:41:29,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:29,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183406926] [2021-06-05 22:41:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:29,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:29,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183406926] [2021-06-05 22:41:29,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183406926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:29,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274510784] [2021-06-05 22:41:29,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:29,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:41:29,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:29,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:29,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:29,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:29,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:41:29,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:29,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:29,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:29,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:41:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:29,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274510784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:29,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:29,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:29,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414349303] [2021-06-05 22:41:29,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:29,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:29,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:29,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:29,744 INFO L87 Difference]: Start difference. First operand 4568 states and 19426 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:30,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:30,727 INFO L93 Difference]: Finished difference Result 5416 states and 22681 transitions. [2021-06-05 22:41:30,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:41:30,727 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:30,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:30,737 INFO L225 Difference]: With dead ends: 5416 [2021-06-05 22:41:30,737 INFO L226 Difference]: Without dead ends: 5360 [2021-06-05 22:41:30,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 782.8ms TimeCoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:41:30,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5360 states. [2021-06-05 22:41:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5360 to 4574. [2021-06-05 22:41:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.254100153072382) internal successors, (19454), 4573 states have internal predecessors, (19454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:30,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 19454 transitions. [2021-06-05 22:41:30,800 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 19454 transitions. Word has length 23 [2021-06-05 22:41:30,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:30,800 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 19454 transitions. [2021-06-05 22:41:30,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:30,800 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 19454 transitions. [2021-06-05 22:41:30,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:30,806 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:30,806 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:31,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1268 [2021-06-05 22:41:31,007 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:31,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:31,007 INFO L82 PathProgramCache]: Analyzing trace with hash 936687145, now seen corresponding path program 10 times [2021-06-05 22:41:31,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:31,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453260553] [2021-06-05 22:41:31,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:31,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:31,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453260553] [2021-06-05 22:41:31,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453260553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:31,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001489358] [2021-06-05 22:41:31,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:31,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:31,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:31,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:31,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:31,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:31,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:41:31,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:31,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:31,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:31,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:41:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:31,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001489358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:31,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:31,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:31,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837798911] [2021-06-05 22:41:31,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:31,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:31,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:31,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:31,348 INFO L87 Difference]: Start difference. First operand 4574 states and 19454 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:32,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:32,307 INFO L93 Difference]: Finished difference Result 5380 states and 22550 transitions. [2021-06-05 22:41:32,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:41:32,307 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:32,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:32,316 INFO L225 Difference]: With dead ends: 5380 [2021-06-05 22:41:32,316 INFO L226 Difference]: Without dead ends: 5334 [2021-06-05 22:41:32,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 767.3ms TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:41:32,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2021-06-05 22:41:32,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 4572. [2021-06-05 22:41:32,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4571 states have (on average 4.254648873331875) internal successors, (19448), 4571 states have internal predecessors, (19448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:32,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 19448 transitions. [2021-06-05 22:41:32,378 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 19448 transitions. Word has length 23 [2021-06-05 22:41:32,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:32,378 INFO L482 AbstractCegarLoop]: Abstraction has 4572 states and 19448 transitions. [2021-06-05 22:41:32,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:32,378 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 19448 transitions. [2021-06-05 22:41:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:32,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:32,385 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:32,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1270 [2021-06-05 22:41:32,585 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:32,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1544061897, now seen corresponding path program 7 times [2021-06-05 22:41:32,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:32,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749077940] [2021-06-05 22:41:32,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:32,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:32,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749077940] [2021-06-05 22:41:32,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749077940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:32,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985663014] [2021-06-05 22:41:32,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:32,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:32,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:32,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:32,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:41:32,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:32,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:32,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:32,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:41:32,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:32,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985663014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:32,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:32,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:32,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513894668] [2021-06-05 22:41:32,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:32,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:32,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:32,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:32,897 INFO L87 Difference]: Start difference. First operand 4572 states and 19448 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:34,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:34,001 INFO L93 Difference]: Finished difference Result 5685 states and 23805 transitions. [2021-06-05 22:41:34,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:41:34,002 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:34,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:34,011 INFO L225 Difference]: With dead ends: 5685 [2021-06-05 22:41:34,012 INFO L226 Difference]: Without dead ends: 5641 [2021-06-05 22:41:34,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 737.2ms TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:41:34,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5641 states. [2021-06-05 22:41:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5641 to 4574. [2021-06-05 22:41:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.254756177563962) internal successors, (19457), 4573 states have internal predecessors, (19457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:34,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 19457 transitions. [2021-06-05 22:41:34,078 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 19457 transitions. Word has length 23 [2021-06-05 22:41:34,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:34,078 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 19457 transitions. [2021-06-05 22:41:34,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:34,078 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 19457 transitions. [2021-06-05 22:41:34,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:34,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:34,084 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:34,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1272,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:34,284 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:34,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:34,285 INFO L82 PathProgramCache]: Analyzing trace with hash -958727945, now seen corresponding path program 8 times [2021-06-05 22:41:34,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:34,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408097032] [2021-06-05 22:41:34,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:34,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:34,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408097032] [2021-06-05 22:41:34,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408097032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:34,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628123799] [2021-06-05 22:41:34,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:34,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:34,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:34,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:34,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:34,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:34,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:41:34,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:34,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:34,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:34,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:41:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:34,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628123799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:34,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:34,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:34,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072667344] [2021-06-05 22:41:34,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:34,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:34,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:34,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:34,615 INFO L87 Difference]: Start difference. First operand 4574 states and 19457 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:35,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:35,733 INFO L93 Difference]: Finished difference Result 5479 states and 22926 transitions. [2021-06-05 22:41:35,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:41:35,733 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:35,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:35,766 INFO L225 Difference]: With dead ends: 5479 [2021-06-05 22:41:35,766 INFO L226 Difference]: Without dead ends: 5427 [2021-06-05 22:41:35,767 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 906.6ms TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:41:35,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5427 states. [2021-06-05 22:41:35,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5427 to 4578. [2021-06-05 22:41:35,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 4.2549705046974005) internal successors, (19475), 4577 states have internal predecessors, (19475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:35,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 19475 transitions. [2021-06-05 22:41:35,827 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 19475 transitions. Word has length 23 [2021-06-05 22:41:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:35,827 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 19475 transitions. [2021-06-05 22:41:35,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 19475 transitions. [2021-06-05 22:41:35,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:35,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:35,833 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:36,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1274,585 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:36,034 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:36,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:36,034 INFO L82 PathProgramCache]: Analyzing trace with hash 654838789, now seen corresponding path program 9 times [2021-06-05 22:41:36,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:36,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324188584] [2021-06-05 22:41:36,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:36,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:36,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324188584] [2021-06-05 22:41:36,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324188584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:36,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38732398] [2021-06-05 22:41:36,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:36,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:41:36,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:36,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:36,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:36,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:36,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:41:36,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:36,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:36,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:36,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:41:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:36,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38732398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:36,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:36,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:36,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460664672] [2021-06-05 22:41:36,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:36,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:36,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:36,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:36,366 INFO L87 Difference]: Start difference. First operand 4578 states and 19475 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:37,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:37,523 INFO L93 Difference]: Finished difference Result 5406 states and 22644 transitions. [2021-06-05 22:41:37,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:41:37,523 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:37,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:37,533 INFO L225 Difference]: With dead ends: 5406 [2021-06-05 22:41:37,534 INFO L226 Difference]: Without dead ends: 5364 [2021-06-05 22:41:37,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 880.2ms TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:41:37,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5364 states. [2021-06-05 22:41:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5364 to 4574. [2021-06-05 22:41:37,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.254756177563962) internal successors, (19457), 4573 states have internal predecessors, (19457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 19457 transitions. [2021-06-05 22:41:37,605 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 19457 transitions. Word has length 23 [2021-06-05 22:41:37,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:37,605 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 19457 transitions. [2021-06-05 22:41:37,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 19457 transitions. [2021-06-05 22:41:37,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:37,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:37,611 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:37,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1276 [2021-06-05 22:41:37,812 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:37,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:37,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1771283277, now seen corresponding path program 10 times [2021-06-05 22:41:37,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:37,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457507557] [2021-06-05 22:41:37,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:37,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:37,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457507557] [2021-06-05 22:41:37,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457507557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:37,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854623542] [2021-06-05 22:41:37,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:37,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:37,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:37,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:37,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:38,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:38,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:41:38,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:38,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:38,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:38,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:41:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:38,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854623542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:38,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:38,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:38,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410457481] [2021-06-05 22:41:38,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:38,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:38,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:38,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:38,125 INFO L87 Difference]: Start difference. First operand 4574 states and 19457 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:39,270 INFO L93 Difference]: Finished difference Result 5921 states and 24768 transitions. [2021-06-05 22:41:39,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:41:39,271 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:39,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:39,281 INFO L225 Difference]: With dead ends: 5921 [2021-06-05 22:41:39,281 INFO L226 Difference]: Without dead ends: 5877 [2021-06-05 22:41:39,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 866.7ms TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:41:39,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5877 states. [2021-06-05 22:41:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5877 to 4574. [2021-06-05 22:41:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.254756177563962) internal successors, (19457), 4573 states have internal predecessors, (19457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 19457 transitions. [2021-06-05 22:41:39,348 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 19457 transitions. Word has length 23 [2021-06-05 22:41:39,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:39,348 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 19457 transitions. [2021-06-05 22:41:39,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:39,348 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 19457 transitions. [2021-06-05 22:41:39,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:39,355 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:39,355 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:39,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1278 [2021-06-05 22:41:39,555 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:39,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:39,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1257756425, now seen corresponding path program 11 times [2021-06-05 22:41:39,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:39,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282450963] [2021-06-05 22:41:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:39,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:39,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282450963] [2021-06-05 22:41:39,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282450963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:39,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146281834] [2021-06-05 22:41:39,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:39,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:41:39,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:39,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:41:39,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:39,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:39,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 46 [2021-06-05 22:41:39,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:39,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:39,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:39,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:37 [2021-06-05 22:41:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:39,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146281834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:39,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:39,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:41:39,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657145842] [2021-06-05 22:41:39,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:41:39,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:39,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:41:39,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:41:39,838 INFO L87 Difference]: Start difference. First operand 4574 states and 19457 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:40,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:40,814 INFO L93 Difference]: Finished difference Result 5605 states and 23487 transitions. [2021-06-05 22:41:40,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:41:40,814 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:40,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:40,824 INFO L225 Difference]: With dead ends: 5605 [2021-06-05 22:41:40,824 INFO L226 Difference]: Without dead ends: 5580 [2021-06-05 22:41:40,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 747.0ms TimeCoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:41:40,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5580 states. [2021-06-05 22:41:40,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5580 to 4578. [2021-06-05 22:41:40,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 4.2549705046974005) internal successors, (19475), 4577 states have internal predecessors, (19475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 19475 transitions. [2021-06-05 22:41:40,887 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 19475 transitions. Word has length 23 [2021-06-05 22:41:40,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:40,887 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 19475 transitions. [2021-06-05 22:41:40,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:40,887 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 19475 transitions. [2021-06-05 22:41:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:40,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:40,893 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:41,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1280,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:41,094 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:41,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:41,094 INFO L82 PathProgramCache]: Analyzing trace with hash -182045269, now seen corresponding path program 12 times [2021-06-05 22:41:41,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:41,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170596967] [2021-06-05 22:41:41,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:41,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:41,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170596967] [2021-06-05 22:41:41,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170596967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:41,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553005427] [2021-06-05 22:41:41,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:41,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:41:41,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:41,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:41,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:41,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:41,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:41:41,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:41,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:41,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:41,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:41:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:41,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553005427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:41,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:41,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:41,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6834957] [2021-06-05 22:41:41,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:41,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:41,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:41,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:41,446 INFO L87 Difference]: Start difference. First operand 4578 states and 19475 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:42,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:42,428 INFO L93 Difference]: Finished difference Result 5643 states and 23600 transitions. [2021-06-05 22:41:42,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:41:42,428 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:42,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:42,439 INFO L225 Difference]: With dead ends: 5643 [2021-06-05 22:41:42,439 INFO L226 Difference]: Without dead ends: 5601 [2021-06-05 22:41:42,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 847.2ms TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:41:42,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-05 22:41:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4574. [2021-06-05 22:41:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.254756177563962) internal successors, (19457), 4573 states have internal predecessors, (19457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:42,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 19457 transitions. [2021-06-05 22:41:42,507 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 19457 transitions. Word has length 23 [2021-06-05 22:41:42,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:42,507 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 19457 transitions. [2021-06-05 22:41:42,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:42,507 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 19457 transitions. [2021-06-05 22:41:42,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:42,514 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:42,514 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:42,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1283,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:42,714 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:42,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:42,714 INFO L82 PathProgramCache]: Analyzing trace with hash 98950583, now seen corresponding path program 13 times [2021-06-05 22:41:42,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:42,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499220960] [2021-06-05 22:41:42,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:42,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:42,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499220960] [2021-06-05 22:41:42,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499220960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:42,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415793143] [2021-06-05 22:41:42,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:42,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:42,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:42,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:42,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:41:42,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:42,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:42,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:42,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:41:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:43,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415793143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:43,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:43,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:43,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863359055] [2021-06-05 22:41:43,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:43,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:43,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:43,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:43,055 INFO L87 Difference]: Start difference. First operand 4574 states and 19457 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:43,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:43,939 INFO L93 Difference]: Finished difference Result 5111 states and 21521 transitions. [2021-06-05 22:41:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:41:43,939 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:43,950 INFO L225 Difference]: With dead ends: 5111 [2021-06-05 22:41:43,950 INFO L226 Difference]: Without dead ends: 5085 [2021-06-05 22:41:43,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 752.7ms TimeCoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:41:43,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5085 states. [2021-06-05 22:41:44,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5085 to 4583. [2021-06-05 22:41:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 4582 states have (on average 4.253382802269751) internal successors, (19489), 4582 states have internal predecessors, (19489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:44,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 19489 transitions. [2021-06-05 22:41:44,033 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 19489 transitions. Word has length 23 [2021-06-05 22:41:44,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:44,033 INFO L482 AbstractCegarLoop]: Abstraction has 4583 states and 19489 transitions. [2021-06-05 22:41:44,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:44,033 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 19489 transitions. [2021-06-05 22:41:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:44,039 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:44,039 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:44,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1285,590 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:44,240 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:44,240 INFO L82 PathProgramCache]: Analyzing trace with hash -942625485, now seen corresponding path program 14 times [2021-06-05 22:41:44,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:44,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282195514] [2021-06-05 22:41:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:44,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:44,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282195514] [2021-06-05 22:41:44,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282195514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:44,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421792752] [2021-06-05 22:41:44,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:44,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:44,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:44,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:44,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:44,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:44,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:41:44,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:44,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:44,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:44,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:41:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:44,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421792752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:44,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:44,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:44,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073779631] [2021-06-05 22:41:44,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:44,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:44,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:44,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:44,573 INFO L87 Difference]: Start difference. First operand 4583 states and 19489 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:45,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:45,405 INFO L93 Difference]: Finished difference Result 5109 states and 21511 transitions. [2021-06-05 22:41:45,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:41:45,406 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:45,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:45,415 INFO L225 Difference]: With dead ends: 5109 [2021-06-05 22:41:45,415 INFO L226 Difference]: Without dead ends: 5081 [2021-06-05 22:41:45,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 720.9ms TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:41:45,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5081 states. [2021-06-05 22:41:45,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5081 to 4576. [2021-06-05 22:41:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 4.254644808743169) internal successors, (19465), 4575 states have internal predecessors, (19465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 19465 transitions. [2021-06-05 22:41:45,477 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 19465 transitions. Word has length 23 [2021-06-05 22:41:45,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:45,477 INFO L482 AbstractCegarLoop]: Abstraction has 4576 states and 19465 transitions. [2021-06-05 22:41:45,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:45,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 19465 transitions. [2021-06-05 22:41:45,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:45,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:45,484 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:45,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1287 [2021-06-05 22:41:45,684 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:45,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1229746837, now seen corresponding path program 15 times [2021-06-05 22:41:45,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:45,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733457773] [2021-06-05 22:41:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:45,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:45,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733457773] [2021-06-05 22:41:45,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733457773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:45,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839925212] [2021-06-05 22:41:45,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:45,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:41:45,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:45,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:45,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:45,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:45,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 22:41:45,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:45,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:45,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:45,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 22:41:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:46,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839925212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:46,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:46,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:46,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747976023] [2021-06-05 22:41:46,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:46,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:46,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:46,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:46,044 INFO L87 Difference]: Start difference. First operand 4576 states and 19465 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:46,980 INFO L93 Difference]: Finished difference Result 5090 states and 21438 transitions. [2021-06-05 22:41:46,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:41:46,980 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:46,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:46,989 INFO L225 Difference]: With dead ends: 5090 [2021-06-05 22:41:46,989 INFO L226 Difference]: Without dead ends: 5064 [2021-06-05 22:41:46,989 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 754.3ms TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:41:46,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2021-06-05 22:41:47,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 4580. [2021-06-05 22:41:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4580 states, 4579 states have (on average 4.254422362961345) internal successors, (19481), 4579 states have internal predecessors, (19481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4580 states to 4580 states and 19481 transitions. [2021-06-05 22:41:47,052 INFO L78 Accepts]: Start accepts. Automaton has 4580 states and 19481 transitions. Word has length 23 [2021-06-05 22:41:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:47,052 INFO L482 AbstractCegarLoop]: Abstraction has 4580 states and 19481 transitions. [2021-06-05 22:41:47,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 4580 states and 19481 transitions. [2021-06-05 22:41:47,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:47,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:47,059 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:47,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1289 [2021-06-05 22:41:47,260 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:47,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:47,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1722964223, now seen corresponding path program 16 times [2021-06-05 22:41:47,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:47,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345338882] [2021-06-05 22:41:47,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:47,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:47,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345338882] [2021-06-05 22:41:47,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345338882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:47,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718846221] [2021-06-05 22:41:47,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:47,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:47,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:47,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:47,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:47,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:47,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:41:47,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:47,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:47,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:47,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:41:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:47,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718846221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:47,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:47,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:47,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663036632] [2021-06-05 22:41:47,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:47,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:47,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:47,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:47,611 INFO L87 Difference]: Start difference. First operand 4580 states and 19481 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:48,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:48,477 INFO L93 Difference]: Finished difference Result 5035 states and 21226 transitions. [2021-06-05 22:41:48,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:41:48,478 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:48,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:48,487 INFO L225 Difference]: With dead ends: 5035 [2021-06-05 22:41:48,487 INFO L226 Difference]: Without dead ends: 5014 [2021-06-05 22:41:48,488 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 699.8ms TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:41:48,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5014 states. [2021-06-05 22:41:48,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5014 to 4576. [2021-06-05 22:41:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 4.254644808743169) internal successors, (19465), 4575 states have internal predecessors, (19465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:48,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 19465 transitions. [2021-06-05 22:41:48,550 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 19465 transitions. Word has length 23 [2021-06-05 22:41:48,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:48,551 INFO L482 AbstractCegarLoop]: Abstraction has 4576 states and 19465 transitions. [2021-06-05 22:41:48,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:48,551 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 19465 transitions. [2021-06-05 22:41:48,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:48,557 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:48,557 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:48,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:48,758 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:48,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:48,758 INFO L82 PathProgramCache]: Analyzing trace with hash -788187967, now seen corresponding path program 17 times [2021-06-05 22:41:48,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:48,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513773726] [2021-06-05 22:41:48,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:48,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:48,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513773726] [2021-06-05 22:41:48,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513773726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:48,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313020496] [2021-06-05 22:41:48,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:48,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:48,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:48,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:48,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:48,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:48,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:41:48,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:48,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:48,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:48,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:41:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:49,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313020496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:49,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:49,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:49,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814823908] [2021-06-05 22:41:49,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:49,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:49,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:49,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:49,110 INFO L87 Difference]: Start difference. First operand 4576 states and 19465 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:49,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:49,942 INFO L93 Difference]: Finished difference Result 5100 states and 21473 transitions. [2021-06-05 22:41:49,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:41:49,942 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:49,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:49,951 INFO L225 Difference]: With dead ends: 5100 [2021-06-05 22:41:49,951 INFO L226 Difference]: Without dead ends: 5075 [2021-06-05 22:41:49,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 678.9ms TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:41:49,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2021-06-05 22:41:50,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 4580. [2021-06-05 22:41:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4580 states, 4579 states have (on average 4.254422362961345) internal successors, (19481), 4579 states have internal predecessors, (19481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4580 states to 4580 states and 19481 transitions. [2021-06-05 22:41:50,017 INFO L78 Accepts]: Start accepts. Automaton has 4580 states and 19481 transitions. Word has length 23 [2021-06-05 22:41:50,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:50,017 INFO L482 AbstractCegarLoop]: Abstraction has 4580 states and 19481 transitions. [2021-06-05 22:41:50,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:50,017 INFO L276 IsEmpty]: Start isEmpty. Operand 4580 states and 19481 transitions. [2021-06-05 22:41:50,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:50,024 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:50,024 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:50,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1293,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:50,224 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:50,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:50,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1800880499, now seen corresponding path program 18 times [2021-06-05 22:41:50,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:50,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352148293] [2021-06-05 22:41:50,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:50,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:50,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352148293] [2021-06-05 22:41:50,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352148293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:50,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236338776] [2021-06-05 22:41:50,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:50,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:41:50,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:50,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:50,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:50,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:50,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 22:41:50,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:50,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:50,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:50,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:41 [2021-06-05 22:41:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:50,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236338776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:50,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:50,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:50,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51804167] [2021-06-05 22:41:50,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:50,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:50,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:50,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:50,573 INFO L87 Difference]: Start difference. First operand 4580 states and 19481 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:51,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:51,451 INFO L93 Difference]: Finished difference Result 5049 states and 21279 transitions. [2021-06-05 22:41:51,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:41:51,452 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:51,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:51,461 INFO L225 Difference]: With dead ends: 5049 [2021-06-05 22:41:51,461 INFO L226 Difference]: Without dead ends: 5028 [2021-06-05 22:41:51,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 700.6ms TimeCoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:41:51,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5028 states. [2021-06-05 22:41:51,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5028 to 4574. [2021-06-05 22:41:51,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.254756177563962) internal successors, (19457), 4573 states have internal predecessors, (19457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:51,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 19457 transitions. [2021-06-05 22:41:51,523 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 19457 transitions. Word has length 23 [2021-06-05 22:41:51,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:51,523 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 19457 transitions. [2021-06-05 22:41:51,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:51,523 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 19457 transitions. [2021-06-05 22:41:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:51,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:51,529 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:51,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1295,595 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:51,729 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:51,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:51,730 INFO L82 PathProgramCache]: Analyzing trace with hash -652014379, now seen corresponding path program 19 times [2021-06-05 22:41:51,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:51,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518580546] [2021-06-05 22:41:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:51,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:51,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518580546] [2021-06-05 22:41:51,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518580546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:51,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757600840] [2021-06-05 22:41:51,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:51,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:51,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:51,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:51,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:41:51,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:51,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:51,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:51,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:41:52,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:52,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757600840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:52,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:52,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:52,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481100230] [2021-06-05 22:41:52,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:52,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:52,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:52,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:52,041 INFO L87 Difference]: Start difference. First operand 4574 states and 19457 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:53,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:53,087 INFO L93 Difference]: Finished difference Result 5487 states and 22970 transitions. [2021-06-05 22:41:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:41:53,087 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:53,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:53,097 INFO L225 Difference]: With dead ends: 5487 [2021-06-05 22:41:53,098 INFO L226 Difference]: Without dead ends: 5452 [2021-06-05 22:41:53,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 773.4ms TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:41:53,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5452 states. [2021-06-05 22:41:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5452 to 4570. [2021-06-05 22:41:53,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4569 states have (on average 4.2519150798861896) internal successors, (19427), 4569 states have internal predecessors, (19427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:53,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 19427 transitions. [2021-06-05 22:41:53,166 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 19427 transitions. Word has length 23 [2021-06-05 22:41:53,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:53,166 INFO L482 AbstractCegarLoop]: Abstraction has 4570 states and 19427 transitions. [2021-06-05 22:41:53,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:53,166 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 19427 transitions. [2021-06-05 22:41:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:53,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:53,173 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:53,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1297 [2021-06-05 22:41:53,373 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:53,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:53,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1093269657, now seen corresponding path program 20 times [2021-06-05 22:41:53,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:53,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449130079] [2021-06-05 22:41:53,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:53,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:53,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449130079] [2021-06-05 22:41:53,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449130079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:53,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386382752] [2021-06-05 22:41:53,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:53,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:53,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:53,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:53,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:53,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:53,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 22:41:53,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:53,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:53,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:53,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:39 [2021-06-05 22:41:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:53,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386382752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:53,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:53,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:53,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392887533] [2021-06-05 22:41:53,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:53,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:53,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:53,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:53,707 INFO L87 Difference]: Start difference. First operand 4570 states and 19427 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:54,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:54,714 INFO L93 Difference]: Finished difference Result 5170 states and 21719 transitions. [2021-06-05 22:41:54,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:41:54,715 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:54,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:54,724 INFO L225 Difference]: With dead ends: 5170 [2021-06-05 22:41:54,724 INFO L226 Difference]: Without dead ends: 5144 [2021-06-05 22:41:54,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 781.7ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:41:54,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2021-06-05 22:41:54,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 4577. [2021-06-05 22:41:54,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4577 states, 4576 states have (on average 4.250655594405594) internal successors, (19451), 4576 states have internal predecessors, (19451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:54,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4577 states to 4577 states and 19451 transitions. [2021-06-05 22:41:54,790 INFO L78 Accepts]: Start accepts. Automaton has 4577 states and 19451 transitions. Word has length 23 [2021-06-05 22:41:54,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:54,790 INFO L482 AbstractCegarLoop]: Abstraction has 4577 states and 19451 transitions. [2021-06-05 22:41:54,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4577 states and 19451 transitions. [2021-06-05 22:41:54,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:54,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:54,797 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:54,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1299 [2021-06-05 22:41:54,997 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:54,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:54,997 INFO L82 PathProgramCache]: Analyzing trace with hash 51693589, now seen corresponding path program 21 times [2021-06-05 22:41:54,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:54,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614565303] [2021-06-05 22:41:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:55,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:55,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614565303] [2021-06-05 22:41:55,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614565303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:55,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000467544] [2021-06-05 22:41:55,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:55,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:41:55,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:55,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:55,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:55,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:55,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:41:55,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:55,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:55,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:55,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:41:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:55,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000467544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:55,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:55,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:55,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145166875] [2021-06-05 22:41:55,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:55,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:55,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:55,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:55,350 INFO L87 Difference]: Start difference. First operand 4577 states and 19451 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:56,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:56,388 INFO L93 Difference]: Finished difference Result 5165 states and 21705 transitions. [2021-06-05 22:41:56,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:41:56,388 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:56,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:56,398 INFO L225 Difference]: With dead ends: 5165 [2021-06-05 22:41:56,398 INFO L226 Difference]: Without dead ends: 5133 [2021-06-05 22:41:56,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 741.0ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:41:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5133 states. [2021-06-05 22:41:56,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5133 to 4559. [2021-06-05 22:41:56,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4559 states, 4558 states have (on average 4.252742430890741) internal successors, (19384), 4558 states have internal predecessors, (19384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4559 states to 4559 states and 19384 transitions. [2021-06-05 22:41:56,462 INFO L78 Accepts]: Start accepts. Automaton has 4559 states and 19384 transitions. Word has length 23 [2021-06-05 22:41:56,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:56,462 INFO L482 AbstractCegarLoop]: Abstraction has 4559 states and 19384 transitions. [2021-06-05 22:41:56,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:56,462 INFO L276 IsEmpty]: Start isEmpty. Operand 4559 states and 19384 transitions. [2021-06-05 22:41:56,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:56,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:56,468 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:56,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1301,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:56,669 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:56,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:56,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1108038561, now seen corresponding path program 22 times [2021-06-05 22:41:56,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:56,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784101171] [2021-06-05 22:41:56,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:56,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:56,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784101171] [2021-06-05 22:41:56,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784101171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:56,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864072088] [2021-06-05 22:41:56,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:56,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:56,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:56,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:56,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:56,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:56,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:41:56,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:56,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:56,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:56,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:41:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:56,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864072088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:56,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:56,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:56,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676906894] [2021-06-05 22:41:56,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:56,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:56,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:56,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:56,978 INFO L87 Difference]: Start difference. First operand 4559 states and 19384 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:58,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:58,083 INFO L93 Difference]: Finished difference Result 5721 states and 23885 transitions. [2021-06-05 22:41:58,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:41:58,084 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:58,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:58,094 INFO L225 Difference]: With dead ends: 5721 [2021-06-05 22:41:58,094 INFO L226 Difference]: Without dead ends: 5656 [2021-06-05 22:41:58,094 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 742.9ms TimeCoverageRelationStatistics Valid=207, Invalid=1353, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:41:58,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5656 states. [2021-06-05 22:41:58,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5656 to 4561. [2021-06-05 22:41:58,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 4560 states have (on average 4.25219298245614) internal successors, (19390), 4560 states have internal predecessors, (19390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 19390 transitions. [2021-06-05 22:41:58,161 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 19390 transitions. Word has length 23 [2021-06-05 22:41:58,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:58,161 INFO L482 AbstractCegarLoop]: Abstraction has 4561 states and 19390 transitions. [2021-06-05 22:41:58,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:58,161 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 19390 transitions. [2021-06-05 22:41:58,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:58,167 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:58,167 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:58,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1303 [2021-06-05 22:41:58,367 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:58,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:58,368 INFO L82 PathProgramCache]: Analyzing trace with hash 303639337, now seen corresponding path program 23 times [2021-06-05 22:41:58,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:58,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615892257] [2021-06-05 22:41:58,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:58,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:58,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615892257] [2021-06-05 22:41:58,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615892257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:58,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748761542] [2021-06-05 22:41:58,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:58,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:58,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:58,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:41:58,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:58,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:58,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:41:58,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:58,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:58,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:58,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:41:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:58,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748761542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:58,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:58,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:41:58,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422802368] [2021-06-05 22:41:58,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:58,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:58,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:58,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:58,700 INFO L87 Difference]: Start difference. First operand 4561 states and 19390 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:59,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:59,753 INFO L93 Difference]: Finished difference Result 5380 states and 22537 transitions. [2021-06-05 22:41:59,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:41:59,753 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:41:59,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:59,763 INFO L225 Difference]: With dead ends: 5380 [2021-06-05 22:41:59,763 INFO L226 Difference]: Without dead ends: 5328 [2021-06-05 22:41:59,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 774.4ms TimeCoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:41:59,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-06-05 22:41:59,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4563. [2021-06-05 22:41:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 4.251644015782552) internal successors, (19396), 4562 states have internal predecessors, (19396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 19396 transitions. [2021-06-05 22:41:59,829 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 19396 transitions. Word has length 23 [2021-06-05 22:41:59,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:59,829 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 19396 transitions. [2021-06-05 22:41:59,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:59,829 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 19396 transitions. [2021-06-05 22:41:59,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:41:59,835 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:59,835 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:00,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1305 [2021-06-05 22:42:00,036 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:00,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:00,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1917206071, now seen corresponding path program 24 times [2021-06-05 22:42:00,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:00,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539330131] [2021-06-05 22:42:00,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:00,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:00,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539330131] [2021-06-05 22:42:00,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539330131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:00,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25017632] [2021-06-05 22:42:00,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:00,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:42:00,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:00,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:00,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:00,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:00,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:00,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:00,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:00,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:00,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:42:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:00,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25017632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:00,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:00,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:42:00,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083226640] [2021-06-05 22:42:00,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:42:00,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:00,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:42:00,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:42:00,374 INFO L87 Difference]: Start difference. First operand 4563 states and 19396 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:01,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:01,371 INFO L93 Difference]: Finished difference Result 5341 states and 22402 transitions. [2021-06-05 22:42:01,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:42:01,371 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:01,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:01,380 INFO L225 Difference]: With dead ends: 5341 [2021-06-05 22:42:01,380 INFO L226 Difference]: Without dead ends: 5299 [2021-06-05 22:42:01,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 755.8ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:42:01,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5299 states. [2021-06-05 22:42:01,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5299 to 4555. [2021-06-05 22:42:01,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4555 states, 4554 states have (on average 4.2516469038208164) internal successors, (19362), 4554 states have internal predecessors, (19362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4555 states to 4555 states and 19362 transitions. [2021-06-05 22:42:01,445 INFO L78 Accepts]: Start accepts. Automaton has 4555 states and 19362 transitions. Word has length 23 [2021-06-05 22:42:01,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:01,445 INFO L482 AbstractCegarLoop]: Abstraction has 4555 states and 19362 transitions. [2021-06-05 22:42:01,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 4555 states and 19362 transitions. [2021-06-05 22:42:01,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:01,452 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:01,452 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:01,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1307,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:01,652 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:01,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:01,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2008351145, now seen corresponding path program 25 times [2021-06-05 22:42:01,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:01,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563165807] [2021-06-05 22:42:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:01,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:01,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563165807] [2021-06-05 22:42:01,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563165807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:01,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119196834] [2021-06-05 22:42:01,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:01,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:01,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:01,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:01,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:01,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:01,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:01,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:01,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:42:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:01,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119196834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:01,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:01,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:42:01,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897496420] [2021-06-05 22:42:01,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:42:01,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:01,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:42:01,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:42:01,998 INFO L87 Difference]: Start difference. First operand 4555 states and 19362 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:02,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:02,954 INFO L93 Difference]: Finished difference Result 5073 states and 21348 transitions. [2021-06-05 22:42:02,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:42:02,954 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:02,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:02,964 INFO L225 Difference]: With dead ends: 5073 [2021-06-05 22:42:02,964 INFO L226 Difference]: Without dead ends: 5047 [2021-06-05 22:42:02,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 718.9ms TimeCoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:42:02,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5047 states. [2021-06-05 22:42:03,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5047 to 4564. [2021-06-05 22:42:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4564 states, 4563 states have (on average 4.250273942581635) internal successors, (19394), 4563 states have internal predecessors, (19394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4564 states to 4564 states and 19394 transitions. [2021-06-05 22:42:03,031 INFO L78 Accepts]: Start accepts. Automaton has 4564 states and 19394 transitions. Word has length 23 [2021-06-05 22:42:03,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:03,031 INFO L482 AbstractCegarLoop]: Abstraction has 4564 states and 19394 transitions. [2021-06-05 22:42:03,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:03,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4564 states and 19394 transitions. [2021-06-05 22:42:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:03,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:03,039 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:03,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1309,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:03,239 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:03,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:03,239 INFO L82 PathProgramCache]: Analyzing trace with hash 966775077, now seen corresponding path program 26 times [2021-06-05 22:42:03,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:03,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770998190] [2021-06-05 22:42:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:03,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:03,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770998190] [2021-06-05 22:42:03,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770998190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:03,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511367075] [2021-06-05 22:42:03,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:03,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:03,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:03,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:03,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:03,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:03,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:03,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:03,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:03,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:03,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:42:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:03,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511367075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:03,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:03,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:42:03,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39522271] [2021-06-05 22:42:03,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:42:03,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:03,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:42:03,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:42:03,623 INFO L87 Difference]: Start difference. First operand 4564 states and 19394 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:04,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:04,359 INFO L93 Difference]: Finished difference Result 5061 states and 21291 transitions. [2021-06-05 22:42:04,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:42:04,359 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:04,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:04,368 INFO L225 Difference]: With dead ends: 5061 [2021-06-05 22:42:04,368 INFO L226 Difference]: Without dead ends: 5033 [2021-06-05 22:42:04,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 705.2ms TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:42:04,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5033 states. [2021-06-05 22:42:04,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5033 to 4557. [2021-06-05 22:42:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4557 states, 4556 states have (on average 4.25153643546971) internal successors, (19370), 4556 states have internal predecessors, (19370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:04,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4557 states to 4557 states and 19370 transitions. [2021-06-05 22:42:04,430 INFO L78 Accepts]: Start accepts. Automaton has 4557 states and 19370 transitions. Word has length 23 [2021-06-05 22:42:04,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:04,430 INFO L482 AbstractCegarLoop]: Abstraction has 4557 states and 19370 transitions. [2021-06-05 22:42:04,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:04,430 INFO L276 IsEmpty]: Start isEmpty. Operand 4557 states and 19370 transitions. [2021-06-05 22:42:04,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:04,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:04,436 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:04,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1311 [2021-06-05 22:42:04,637 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:04,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:04,637 INFO L82 PathProgramCache]: Analyzing trace with hash 679653725, now seen corresponding path program 27 times [2021-06-05 22:42:04,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:04,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998512495] [2021-06-05 22:42:04,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:04,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:04,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998512495] [2021-06-05 22:42:04,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998512495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:04,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997962151] [2021-06-05 22:42:04,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:04,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:42:04,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:04,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:04,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:04,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:04,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:04,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:04,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:04,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:04,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:42:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:04,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997962151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:04,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:04,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:42:04,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285293135] [2021-06-05 22:42:04,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:42:04,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:04,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:42:04,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:42:04,988 INFO L87 Difference]: Start difference. First operand 4557 states and 19370 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:05,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:05,842 INFO L93 Difference]: Finished difference Result 5049 states and 21253 transitions. [2021-06-05 22:42:05,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:42:05,843 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:05,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:05,852 INFO L225 Difference]: With dead ends: 5049 [2021-06-05 22:42:05,852 INFO L226 Difference]: Without dead ends: 5023 [2021-06-05 22:42:05,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 670.3ms TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:42:05,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5023 states. [2021-06-05 22:42:05,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5023 to 4561. [2021-06-05 22:42:05,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 4560 states have (on average 4.251315789473685) internal successors, (19386), 4560 states have internal predecessors, (19386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:05,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 19386 transitions. [2021-06-05 22:42:05,916 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 19386 transitions. Word has length 23 [2021-06-05 22:42:05,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:05,916 INFO L482 AbstractCegarLoop]: Abstraction has 4561 states and 19386 transitions. [2021-06-05 22:42:05,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:05,916 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 19386 transitions. [2021-06-05 22:42:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:05,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:05,923 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:06,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1313,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:06,123 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:06,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:06,124 INFO L82 PathProgramCache]: Analyzing trace with hash 186436339, now seen corresponding path program 28 times [2021-06-05 22:42:06,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:06,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037646556] [2021-06-05 22:42:06,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:06,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:06,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037646556] [2021-06-05 22:42:06,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037646556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:06,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075462142] [2021-06-05 22:42:06,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:06,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:06,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:06,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:06,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:06,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:06,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:06,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:06,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:06,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:06,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:42:06,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:06,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075462142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:06,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:06,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:42:06,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770728760] [2021-06-05 22:42:06,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:42:06,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:06,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:42:06,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:42:06,496 INFO L87 Difference]: Start difference. First operand 4561 states and 19386 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:07,232 INFO L93 Difference]: Finished difference Result 4987 states and 21015 transitions. [2021-06-05 22:42:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:42:07,232 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:07,241 INFO L225 Difference]: With dead ends: 4987 [2021-06-05 22:42:07,241 INFO L226 Difference]: Without dead ends: 4966 [2021-06-05 22:42:07,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 644.1ms TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:42:07,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4966 states. [2021-06-05 22:42:07,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4966 to 4557. [2021-06-05 22:42:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4557 states, 4556 states have (on average 4.25153643546971) internal successors, (19370), 4556 states have internal predecessors, (19370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:07,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4557 states to 4557 states and 19370 transitions. [2021-06-05 22:42:07,307 INFO L78 Accepts]: Start accepts. Automaton has 4557 states and 19370 transitions. Word has length 23 [2021-06-05 22:42:07,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:07,308 INFO L482 AbstractCegarLoop]: Abstraction has 4557 states and 19370 transitions. [2021-06-05 22:42:07,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:07,308 INFO L276 IsEmpty]: Start isEmpty. Operand 4557 states and 19370 transitions. [2021-06-05 22:42:07,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:07,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:07,314 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:07,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1315 [2021-06-05 22:42:07,514 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:07,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:07,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1121212595, now seen corresponding path program 29 times [2021-06-05 22:42:07,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:07,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694990169] [2021-06-05 22:42:07,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:07,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:07,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694990169] [2021-06-05 22:42:07,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694990169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:07,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181656859] [2021-06-05 22:42:07,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:07,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:07,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:07,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:07,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:07,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:07,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:07,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:07,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:07,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:07,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:42:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:07,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181656859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:07,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:07,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:42:07,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327894217] [2021-06-05 22:42:07,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:42:07,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:07,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:42:07,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:42:07,851 INFO L87 Difference]: Start difference. First operand 4557 states and 19370 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:08,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:08,617 INFO L93 Difference]: Finished difference Result 5075 states and 21354 transitions. [2021-06-05 22:42:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:42:08,617 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:08,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:08,627 INFO L225 Difference]: With dead ends: 5075 [2021-06-05 22:42:08,627 INFO L226 Difference]: Without dead ends: 5050 [2021-06-05 22:42:08,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 636.5ms TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:42:08,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2021-06-05 22:42:08,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 4561. [2021-06-05 22:42:08,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 4560 states have (on average 4.251315789473685) internal successors, (19386), 4560 states have internal predecessors, (19386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 19386 transitions. [2021-06-05 22:42:08,724 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 19386 transitions. Word has length 23 [2021-06-05 22:42:08,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:08,724 INFO L482 AbstractCegarLoop]: Abstraction has 4561 states and 19386 transitions. [2021-06-05 22:42:08,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:08,724 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 19386 transitions. [2021-06-05 22:42:08,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:08,731 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:08,731 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:08,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1317,606 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:08,931 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:08,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:08,932 INFO L82 PathProgramCache]: Analyzing trace with hash 108520063, now seen corresponding path program 30 times [2021-06-05 22:42:08,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:08,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300637499] [2021-06-05 22:42:08,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:09,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:09,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300637499] [2021-06-05 22:42:09,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300637499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:09,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241624603] [2021-06-05 22:42:09,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:09,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:42:09,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:09,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:09,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:09,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:09,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 22:42:09,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:09,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:09,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:09,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 22:42:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:09,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241624603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:09,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:09,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:42:09,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108767779] [2021-06-05 22:42:09,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:42:09,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:09,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:42:09,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:42:09,279 INFO L87 Difference]: Start difference. First operand 4561 states and 19386 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:10,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:10,007 INFO L93 Difference]: Finished difference Result 5010 states and 21107 transitions. [2021-06-05 22:42:10,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:42:10,007 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:10,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:10,017 INFO L225 Difference]: With dead ends: 5010 [2021-06-05 22:42:10,017 INFO L226 Difference]: Without dead ends: 4989 [2021-06-05 22:42:10,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 663.7ms TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:42:10,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4989 states. [2021-06-05 22:42:10,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4989 to 4555. [2021-06-05 22:42:10,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4555 states, 4554 states have (on average 4.2516469038208164) internal successors, (19362), 4554 states have internal predecessors, (19362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4555 states to 4555 states and 19362 transitions. [2021-06-05 22:42:10,079 INFO L78 Accepts]: Start accepts. Automaton has 4555 states and 19362 transitions. Word has length 23 [2021-06-05 22:42:10,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:10,079 INFO L482 AbstractCegarLoop]: Abstraction has 4555 states and 19362 transitions. [2021-06-05 22:42:10,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:10,079 INFO L276 IsEmpty]: Start isEmpty. Operand 4555 states and 19362 transitions. [2021-06-05 22:42:10,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:10,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:10,085 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:10,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1319 [2021-06-05 22:42:10,285 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:10,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:10,286 INFO L82 PathProgramCache]: Analyzing trace with hash -576423299, now seen corresponding path program 11 times [2021-06-05 22:42:10,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:10,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137571598] [2021-06-05 22:42:10,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:10,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:10,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137571598] [2021-06-05 22:42:10,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137571598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:10,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904642340] [2021-06-05 22:42:10,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:10,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:42:10,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:10,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:10,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:10,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:10,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:42:10,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:10,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:10,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:10,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:42:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:10,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904642340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:10,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:10,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:42:10,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397282005] [2021-06-05 22:42:10,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:42:10,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:10,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:42:10,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:42:10,598 INFO L87 Difference]: Start difference. First operand 4555 states and 19362 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:11,457 INFO L93 Difference]: Finished difference Result 5307 states and 22252 transitions. [2021-06-05 22:42:11,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:42:11,457 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:11,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:11,467 INFO L225 Difference]: With dead ends: 5307 [2021-06-05 22:42:11,467 INFO L226 Difference]: Without dead ends: 5298 [2021-06-05 22:42:11,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 644.3ms TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:42:11,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5298 states. [2021-06-05 22:42:11,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5298 to 4579. [2021-06-05 22:42:11,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 4578 states have (on average 4.254914809960682) internal successors, (19479), 4578 states have internal predecessors, (19479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:11,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 19479 transitions. [2021-06-05 22:42:11,553 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 19479 transitions. Word has length 23 [2021-06-05 22:42:11,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:11,553 INFO L482 AbstractCegarLoop]: Abstraction has 4579 states and 19479 transitions. [2021-06-05 22:42:11,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:11,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 19479 transitions. [2021-06-05 22:42:11,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:11,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:11,560 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:11,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1321 [2021-06-05 22:42:11,760 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:11,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:11,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1606115367, now seen corresponding path program 12 times [2021-06-05 22:42:11,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:11,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372769791] [2021-06-05 22:42:11,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:11,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:11,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372769791] [2021-06-05 22:42:11,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372769791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:11,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19120800] [2021-06-05 22:42:11,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:11,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:42:11,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:11,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:42:11,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:12,014 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:42:12,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 22:42:12,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:42:12,042 INFO L628 ElimStorePlain]: treesize reduction 55, result has 23.6 percent of original size [2021-06-05 22:42:12,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:12,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:17 [2021-06-05 22:42:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:12,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19120800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:12,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:12,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:12,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933339548] [2021-06-05 22:42:12,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:12,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:12,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:12,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:12,086 INFO L87 Difference]: Start difference. First operand 4579 states and 19479 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:12,658 INFO L93 Difference]: Finished difference Result 5084 states and 21423 transitions. [2021-06-05 22:42:12,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:42:12,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:12,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:12,667 INFO L225 Difference]: With dead ends: 5084 [2021-06-05 22:42:12,667 INFO L226 Difference]: Without dead ends: 5075 [2021-06-05 22:42:12,667 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 364.1ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:42:12,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2021-06-05 22:42:12,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 4585. [2021-06-05 22:42:12,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4585 states, 4584 states have (on average 4.25458115183246) internal successors, (19503), 4584 states have internal predecessors, (19503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:12,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4585 states to 4585 states and 19503 transitions. [2021-06-05 22:42:12,730 INFO L78 Accepts]: Start accepts. Automaton has 4585 states and 19503 transitions. Word has length 23 [2021-06-05 22:42:12,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:12,730 INFO L482 AbstractCegarLoop]: Abstraction has 4585 states and 19503 transitions. [2021-06-05 22:42:12,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:12,730 INFO L276 IsEmpty]: Start isEmpty. Operand 4585 states and 19503 transitions. [2021-06-05 22:42:12,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:12,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:12,736 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:12,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1323 [2021-06-05 22:42:12,937 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:12,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:12,937 INFO L82 PathProgramCache]: Analyzing trace with hash 277417947, now seen corresponding path program 13 times [2021-06-05 22:42:12,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:12,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146634992] [2021-06-05 22:42:12,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:13,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:13,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146634992] [2021-06-05 22:42:13,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146634992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:13,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433487721] [2021-06-05 22:42:13,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:13,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:13,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:13,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:13,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:42:13,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:13,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:13,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:13,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:42:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:13,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433487721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:13,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:13,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:42:13,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032779146] [2021-06-05 22:42:13,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:42:13,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:13,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:42:13,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:42:13,246 INFO L87 Difference]: Start difference. First operand 4585 states and 19503 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:14,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:14,245 INFO L93 Difference]: Finished difference Result 5838 states and 24373 transitions. [2021-06-05 22:42:14,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:42:14,246 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:14,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:14,256 INFO L225 Difference]: With dead ends: 5838 [2021-06-05 22:42:14,257 INFO L226 Difference]: Without dead ends: 5820 [2021-06-05 22:42:14,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 648.4ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:42:14,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2021-06-05 22:42:14,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 4618. [2021-06-05 22:42:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4618 states, 4617 states have (on average 4.258609486679662) internal successors, (19662), 4617 states have internal predecessors, (19662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4618 states to 4618 states and 19662 transitions. [2021-06-05 22:42:14,346 INFO L78 Accepts]: Start accepts. Automaton has 4618 states and 19662 transitions. Word has length 23 [2021-06-05 22:42:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:14,346 INFO L482 AbstractCegarLoop]: Abstraction has 4618 states and 19662 transitions. [2021-06-05 22:42:14,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand 4618 states and 19662 transitions. [2021-06-05 22:42:14,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:14,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:14,353 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:14,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:14,553 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:14,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:14,554 INFO L82 PathProgramCache]: Analyzing trace with hash 865163269, now seen corresponding path program 14 times [2021-06-05 22:42:14,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:14,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683954775] [2021-06-05 22:42:14,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:14,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:14,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683954775] [2021-06-05 22:42:14,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683954775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:14,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789476095] [2021-06-05 22:42:14,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:14,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:14,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:14,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:14,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:14,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:14,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:14,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:14,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:14,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:14,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:42:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:14,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789476095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:14,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:14,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:42:14,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680243733] [2021-06-05 22:42:14,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:42:14,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:14,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:42:14,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:42:14,881 INFO L87 Difference]: Start difference. First operand 4618 states and 19662 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:15,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:15,814 INFO L93 Difference]: Finished difference Result 5534 states and 23202 transitions. [2021-06-05 22:42:15,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:42:15,814 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:15,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:15,824 INFO L225 Difference]: With dead ends: 5534 [2021-06-05 22:42:15,825 INFO L226 Difference]: Without dead ends: 5516 [2021-06-05 22:42:15,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 762.3ms TimeCoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:42:15,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5516 states. [2021-06-05 22:42:15,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5516 to 4648. [2021-06-05 22:42:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 4647 states have (on average 4.262104583602324) internal successors, (19806), 4647 states have internal predecessors, (19806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:15,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 19806 transitions. [2021-06-05 22:42:15,891 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 19806 transitions. Word has length 23 [2021-06-05 22:42:15,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:15,891 INFO L482 AbstractCegarLoop]: Abstraction has 4648 states and 19806 transitions. [2021-06-05 22:42:15,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 19806 transitions. [2021-06-05 22:42:15,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:15,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:15,898 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:16,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1329,611 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:16,098 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:16,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:16,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1940874425, now seen corresponding path program 15 times [2021-06-05 22:42:16,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:16,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692987764] [2021-06-05 22:42:16,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:16,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:16,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692987764] [2021-06-05 22:42:16,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692987764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:16,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816973054] [2021-06-05 22:42:16,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:16,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:42:16,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:16,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:16,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:16,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:16,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:16,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:16,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:16,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:16,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:42:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:16,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816973054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:16,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:16,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:42:16,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500603861] [2021-06-05 22:42:16,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:42:16,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:16,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:42:16,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:42:16,433 INFO L87 Difference]: Start difference. First operand 4648 states and 19806 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:17,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:17,352 INFO L93 Difference]: Finished difference Result 5505 states and 23133 transitions. [2021-06-05 22:42:17,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:42:17,352 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:17,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:17,362 INFO L225 Difference]: With dead ends: 5505 [2021-06-05 22:42:17,362 INFO L226 Difference]: Without dead ends: 5483 [2021-06-05 22:42:17,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 695.6ms TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:42:17,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2021-06-05 22:42:17,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 4678. [2021-06-05 22:42:17,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 4.264271969211033) internal successors, (19944), 4677 states have internal predecessors, (19944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:17,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 19944 transitions. [2021-06-05 22:42:17,428 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 19944 transitions. Word has length 23 [2021-06-05 22:42:17,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:17,428 INFO L482 AbstractCegarLoop]: Abstraction has 4678 states and 19944 transitions. [2021-06-05 22:42:17,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 19944 transitions. [2021-06-05 22:42:17,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:17,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:17,435 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:17,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1331 [2021-06-05 22:42:17,635 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:17,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:17,636 INFO L82 PathProgramCache]: Analyzing trace with hash 200302109, now seen corresponding path program 31 times [2021-06-05 22:42:17,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:17,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120060200] [2021-06-05 22:42:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:17,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:17,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120060200] [2021-06-05 22:42:17,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120060200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:17,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631045553] [2021-06-05 22:42:17,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:17,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:17,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:17,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:17,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:42:17,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:17,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:17,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:17,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:42:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:17,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631045553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:17,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:17,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:17,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613231051] [2021-06-05 22:42:17,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:17,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:17,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:17,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:17,967 INFO L87 Difference]: Start difference. First operand 4678 states and 19944 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:19,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:19,114 INFO L93 Difference]: Finished difference Result 5988 states and 25032 transitions. [2021-06-05 22:42:19,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:42:19,114 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:19,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:19,125 INFO L225 Difference]: With dead ends: 5988 [2021-06-05 22:42:19,125 INFO L226 Difference]: Without dead ends: 5944 [2021-06-05 22:42:19,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 892.9ms TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:42:19,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5944 states. [2021-06-05 22:42:19,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5944 to 4680. [2021-06-05 22:42:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4680 states, 4679 states have (on average 4.264372729215644) internal successors, (19953), 4679 states have internal predecessors, (19953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:19,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4680 states to 4680 states and 19953 transitions. [2021-06-05 22:42:19,193 INFO L78 Accepts]: Start accepts. Automaton has 4680 states and 19953 transitions. Word has length 23 [2021-06-05 22:42:19,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:19,193 INFO L482 AbstractCegarLoop]: Abstraction has 4680 states and 19953 transitions. [2021-06-05 22:42:19,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:19,193 INFO L276 IsEmpty]: Start isEmpty. Operand 4680 states and 19953 transitions. [2021-06-05 22:42:19,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:19,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:19,199 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:19,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1333 [2021-06-05 22:42:19,399 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:19,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:19,400 INFO L82 PathProgramCache]: Analyzing trace with hash 785636061, now seen corresponding path program 32 times [2021-06-05 22:42:19,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:19,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742098369] [2021-06-05 22:42:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:19,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:19,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742098369] [2021-06-05 22:42:19,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742098369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:19,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818160536] [2021-06-05 22:42:19,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:19,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:19,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:19,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:19,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:19,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:19,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:19,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:19,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:19,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:42:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:19,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818160536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:19,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:19,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:19,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067969770] [2021-06-05 22:42:19,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:19,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:19,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:19,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:19,730 INFO L87 Difference]: Start difference. First operand 4680 states and 19953 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:20,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:20,622 INFO L93 Difference]: Finished difference Result 5759 states and 24105 transitions. [2021-06-05 22:42:20,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:42:20,623 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:20,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:20,633 INFO L225 Difference]: With dead ends: 5759 [2021-06-05 22:42:20,633 INFO L226 Difference]: Without dead ends: 5707 [2021-06-05 22:42:20,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 704.5ms TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:42:20,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5707 states. [2021-06-05 22:42:20,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5707 to 4684. [2021-06-05 22:42:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4684 states, 4683 states have (on average 4.26457399103139) internal successors, (19971), 4683 states have internal predecessors, (19971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:20,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4684 states to 4684 states and 19971 transitions. [2021-06-05 22:42:20,699 INFO L78 Accepts]: Start accepts. Automaton has 4684 states and 19971 transitions. Word has length 23 [2021-06-05 22:42:20,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:20,699 INFO L482 AbstractCegarLoop]: Abstraction has 4684 states and 19971 transitions. [2021-06-05 22:42:20,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:20,700 INFO L276 IsEmpty]: Start isEmpty. Operand 4684 states and 19971 transitions. [2021-06-05 22:42:20,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:20,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:20,706 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:20,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1335,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:20,906 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:20,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1895764501, now seen corresponding path program 33 times [2021-06-05 22:42:20,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:20,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829080569] [2021-06-05 22:42:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:21,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:21,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829080569] [2021-06-05 22:42:21,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829080569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:21,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785257928] [2021-06-05 22:42:21,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:21,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:42:21,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:21,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:21,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:21,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:21,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:21,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:21,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:21,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:21,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:42:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:21,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785257928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:21,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:21,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:21,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236132977] [2021-06-05 22:42:21,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:21,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:21,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:21,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:21,229 INFO L87 Difference]: Start difference. First operand 4684 states and 19971 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:22,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:22,531 INFO L93 Difference]: Finished difference Result 5642 states and 23624 transitions. [2021-06-05 22:42:22,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:42:22,531 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:22,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:22,542 INFO L225 Difference]: With dead ends: 5642 [2021-06-05 22:42:22,542 INFO L226 Difference]: Without dead ends: 5600 [2021-06-05 22:42:22,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1059.4ms TimeCoverageRelationStatistics Valid=249, Invalid=1233, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:42:22,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5600 states. [2021-06-05 22:42:22,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5600 to 4672. [2021-06-05 22:42:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4671 states have (on average 4.264397345322201) internal successors, (19919), 4671 states have internal predecessors, (19919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 19919 transitions. [2021-06-05 22:42:22,632 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 19919 transitions. Word has length 23 [2021-06-05 22:42:22,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:22,632 INFO L482 AbstractCegarLoop]: Abstraction has 4672 states and 19919 transitions. [2021-06-05 22:42:22,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:22,632 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 19919 transitions. [2021-06-05 22:42:22,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:22,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:22,638 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:22,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1337 [2021-06-05 22:42:22,839 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:22,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:22,839 INFO L82 PathProgramCache]: Analyzing trace with hash -26919271, now seen corresponding path program 34 times [2021-06-05 22:42:22,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:22,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207796221] [2021-06-05 22:42:22,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:22,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:22,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207796221] [2021-06-05 22:42:22,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207796221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:22,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744735127] [2021-06-05 22:42:22,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:22,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:22,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:22,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:22,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:23,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:23,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:42:23,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:23,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:23,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:23,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:42:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:23,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744735127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:23,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:23,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:23,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787457108] [2021-06-05 22:42:23,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:23,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:23,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:23,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:23,160 INFO L87 Difference]: Start difference. First operand 4672 states and 19919 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:24,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:24,182 INFO L93 Difference]: Finished difference Result 5986 states and 25057 transitions. [2021-06-05 22:42:24,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:42:24,183 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:24,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:24,193 INFO L225 Difference]: With dead ends: 5986 [2021-06-05 22:42:24,193 INFO L226 Difference]: Without dead ends: 5942 [2021-06-05 22:42:24,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 783.4ms TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:42:24,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2021-06-05 22:42:24,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 4674. [2021-06-05 22:42:24,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 4.26407019045581) internal successors, (19926), 4673 states have internal predecessors, (19926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 19926 transitions. [2021-06-05 22:42:24,264 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 19926 transitions. Word has length 23 [2021-06-05 22:42:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:24,264 INFO L482 AbstractCegarLoop]: Abstraction has 4674 states and 19926 transitions. [2021-06-05 22:42:24,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 19926 transitions. [2021-06-05 22:42:24,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:24,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:24,270 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:24,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1339,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:24,471 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:24,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:24,471 INFO L82 PathProgramCache]: Analyzing trace with hash 486607581, now seen corresponding path program 35 times [2021-06-05 22:42:24,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:24,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488644164] [2021-06-05 22:42:24,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:24,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:24,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488644164] [2021-06-05 22:42:24,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488644164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:24,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484134757] [2021-06-05 22:42:24,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:24,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:24,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:24,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:42:24,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:24,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:24,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:24,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:24,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:24,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:24,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:42:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:24,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484134757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:24,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:24,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:24,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891481521] [2021-06-05 22:42:24,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:24,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:24,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:24,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:24,817 INFO L87 Difference]: Start difference. First operand 4674 states and 19926 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:25,966 INFO L93 Difference]: Finished difference Result 5719 states and 23966 transitions. [2021-06-05 22:42:25,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:42:25,966 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:25,976 INFO L225 Difference]: With dead ends: 5719 [2021-06-05 22:42:25,977 INFO L226 Difference]: Without dead ends: 5669 [2021-06-05 22:42:25,977 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 835.9ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:42:25,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5669 states. [2021-06-05 22:42:26,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5669 to 4678. [2021-06-05 22:42:26,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 4.264271969211033) internal successors, (19944), 4677 states have internal predecessors, (19944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 19944 transitions. [2021-06-05 22:42:26,043 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 19944 transitions. Word has length 23 [2021-06-05 22:42:26,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:26,043 INFO L482 AbstractCegarLoop]: Abstraction has 4678 states and 19944 transitions. [2021-06-05 22:42:26,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:26,043 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 19944 transitions. [2021-06-05 22:42:26,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:26,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:26,050 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:26,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1341 [2021-06-05 22:42:26,250 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:26,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:26,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1562318737, now seen corresponding path program 36 times [2021-06-05 22:42:26,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:26,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141230248] [2021-06-05 22:42:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:26,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:26,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141230248] [2021-06-05 22:42:26,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141230248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:26,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762687587] [2021-06-05 22:42:26,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:26,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:42:26,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:26,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:26,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:26,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:26,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:26,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:26,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:26,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:26,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:42:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:26,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762687587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:26,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:26,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:26,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713369832] [2021-06-05 22:42:26,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:26,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:26,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:26,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:26,590 INFO L87 Difference]: Start difference. First operand 4678 states and 19944 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:27,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:27,624 INFO L93 Difference]: Finished difference Result 5596 states and 23481 transitions. [2021-06-05 22:42:27,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:42:27,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:27,635 INFO L225 Difference]: With dead ends: 5596 [2021-06-05 22:42:27,635 INFO L226 Difference]: Without dead ends: 5554 [2021-06-05 22:42:27,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 875.3ms TimeCoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:42:27,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5554 states. [2021-06-05 22:42:27,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5554 to 4672. [2021-06-05 22:42:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4671 states have (on average 4.264397345322201) internal successors, (19919), 4671 states have internal predecessors, (19919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 19919 transitions. [2021-06-05 22:42:27,701 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 19919 transitions. Word has length 23 [2021-06-05 22:42:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:27,701 INFO L482 AbstractCegarLoop]: Abstraction has 4672 states and 19919 transitions. [2021-06-05 22:42:27,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 19919 transitions. [2021-06-05 22:42:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:27,707 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:27,707 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:27,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 618 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1343 [2021-06-05 22:42:27,908 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:27,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:27,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1843314589, now seen corresponding path program 37 times [2021-06-05 22:42:27,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:27,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372131264] [2021-06-05 22:42:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:28,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:28,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372131264] [2021-06-05 22:42:28,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372131264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:28,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33199297] [2021-06-05 22:42:28,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:28,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:28,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:28,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:28,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:28,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:28,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:28,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:28,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:42:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:28,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33199297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:28,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:28,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:28,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607642761] [2021-06-05 22:42:28,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:28,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:28,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:28,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:28,284 INFO L87 Difference]: Start difference. First operand 4672 states and 19919 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:28,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:28,961 INFO L93 Difference]: Finished difference Result 5269 states and 22199 transitions. [2021-06-05 22:42:28,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:42:28,961 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:28,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:28,970 INFO L225 Difference]: With dead ends: 5269 [2021-06-05 22:42:28,970 INFO L226 Difference]: Without dead ends: 5243 [2021-06-05 22:42:28,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 578.1ms TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:42:28,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5243 states. [2021-06-05 22:42:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5243 to 4681. [2021-06-05 22:42:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4681 states, 4680 states have (on average 4.263034188034188) internal successors, (19951), 4680 states have internal predecessors, (19951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:29,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4681 states to 4681 states and 19951 transitions. [2021-06-05 22:42:29,035 INFO L78 Accepts]: Start accepts. Automaton has 4681 states and 19951 transitions. Word has length 23 [2021-06-05 22:42:29,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:29,035 INFO L482 AbstractCegarLoop]: Abstraction has 4681 states and 19951 transitions. [2021-06-05 22:42:29,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:29,035 INFO L276 IsEmpty]: Start isEmpty. Operand 4681 states and 19951 transitions. [2021-06-05 22:42:29,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:29,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:29,042 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:29,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1345 [2021-06-05 22:42:29,242 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:29,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:29,242 INFO L82 PathProgramCache]: Analyzing trace with hash 801738521, now seen corresponding path program 38 times [2021-06-05 22:42:29,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:29,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115667436] [2021-06-05 22:42:29,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:29,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:29,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115667436] [2021-06-05 22:42:29,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115667436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:29,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146925504] [2021-06-05 22:42:29,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:29,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:29,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:29,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:29,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:29,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:29,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:29,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:29,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:29,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:29,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:42:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:29,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146925504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:29,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:29,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:29,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568832569] [2021-06-05 22:42:29,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:29,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:29,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:29,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:29,588 INFO L87 Difference]: Start difference. First operand 4681 states and 19951 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:30,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:30,506 INFO L93 Difference]: Finished difference Result 5205 states and 21938 transitions. [2021-06-05 22:42:30,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:42:30,506 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:30,515 INFO L225 Difference]: With dead ends: 5205 [2021-06-05 22:42:30,515 INFO L226 Difference]: Without dead ends: 5177 [2021-06-05 22:42:30,516 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 736.1ms TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:42:30,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5177 states. [2021-06-05 22:42:30,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5177 to 4674. [2021-06-05 22:42:30,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 4.264284185747914) internal successors, (19927), 4673 states have internal predecessors, (19927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 19927 transitions. [2021-06-05 22:42:30,578 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 19927 transitions. Word has length 23 [2021-06-05 22:42:30,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:30,578 INFO L482 AbstractCegarLoop]: Abstraction has 4674 states and 19927 transitions. [2021-06-05 22:42:30,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:30,578 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 19927 transitions. [2021-06-05 22:42:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:30,585 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:30,585 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:30,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1347,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:30,785 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:30,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:30,785 INFO L82 PathProgramCache]: Analyzing trace with hash 514617169, now seen corresponding path program 39 times [2021-06-05 22:42:30,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:30,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742014341] [2021-06-05 22:42:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:30,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:30,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742014341] [2021-06-05 22:42:30,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742014341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:30,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186374628] [2021-06-05 22:42:30,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:30,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:42:30,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:30,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:42:30,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:31,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:31,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:42:31,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:31,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 22:42:31,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:31,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:31,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:31,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 22:42:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:31,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186374628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:31,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:31,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:31,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36989817] [2021-06-05 22:42:31,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:31,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:31,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:31,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:31,133 INFO L87 Difference]: Start difference. First operand 4674 states and 19927 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:31,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:31,696 INFO L93 Difference]: Finished difference Result 5261 states and 22169 transitions. [2021-06-05 22:42:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:42:31,696 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:31,705 INFO L225 Difference]: With dead ends: 5261 [2021-06-05 22:42:31,705 INFO L226 Difference]: Without dead ends: 5235 [2021-06-05 22:42:31,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 448.8ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:42:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5235 states. [2021-06-05 22:42:31,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5235 to 4678. [2021-06-05 22:42:31,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 4.2640581569382086) internal successors, (19943), 4677 states have internal predecessors, (19943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:31,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 19943 transitions. [2021-06-05 22:42:31,769 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 19943 transitions. Word has length 23 [2021-06-05 22:42:31,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:31,769 INFO L482 AbstractCegarLoop]: Abstraction has 4678 states and 19943 transitions. [2021-06-05 22:42:31,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:31,769 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 19943 transitions. [2021-06-05 22:42:31,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:31,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:31,776 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:31,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1349,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:31,976 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:31,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:31,976 INFO L82 PathProgramCache]: Analyzing trace with hash 21399783, now seen corresponding path program 40 times [2021-06-05 22:42:31,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:31,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091276463] [2021-06-05 22:42:31,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:32,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:32,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091276463] [2021-06-05 22:42:32,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091276463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:32,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538591052] [2021-06-05 22:42:32,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:32,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:32,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:32,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:32,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:32,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:32,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:32,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:32,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:32,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:32,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:42:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:32,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538591052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:32,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:32,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:32,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347614936] [2021-06-05 22:42:32,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:32,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:32,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:32,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:32,317 INFO L87 Difference]: Start difference. First operand 4678 states and 19943 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:33,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:33,378 INFO L93 Difference]: Finished difference Result 5120 states and 21612 transitions. [2021-06-05 22:42:33,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:42:33,378 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:33,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:33,387 INFO L225 Difference]: With dead ends: 5120 [2021-06-05 22:42:33,387 INFO L226 Difference]: Without dead ends: 5099 [2021-06-05 22:42:33,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 852.0ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:42:33,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5099 states. [2021-06-05 22:42:33,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5099 to 4674. [2021-06-05 22:42:33,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 4.264284185747914) internal successors, (19927), 4673 states have internal predecessors, (19927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:33,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 19927 transitions. [2021-06-05 22:42:33,474 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 19927 transitions. Word has length 23 [2021-06-05 22:42:33,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:33,474 INFO L482 AbstractCegarLoop]: Abstraction has 4674 states and 19927 transitions. [2021-06-05 22:42:33,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:33,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 19927 transitions. [2021-06-05 22:42:33,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:33,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:33,480 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:33,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1350,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:33,681 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:33,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:33,681 INFO L82 PathProgramCache]: Analyzing trace with hash 956176039, now seen corresponding path program 41 times [2021-06-05 22:42:33,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:33,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346133046] [2021-06-05 22:42:33,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:33,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:33,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346133046] [2021-06-05 22:42:33,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346133046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:33,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328940852] [2021-06-05 22:42:33,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:33,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:42:33,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:33,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:33,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:33,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:33,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:33,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:33,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:33,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:33,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:42:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:34,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328940852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:34,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:34,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:34,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961026850] [2021-06-05 22:42:34,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:34,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:34,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:34,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:34,037 INFO L87 Difference]: Start difference. First operand 4674 states and 19927 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:34,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:34,874 INFO L93 Difference]: Finished difference Result 5117 states and 21593 transitions. [2021-06-05 22:42:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:42:34,874 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:34,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:34,883 INFO L225 Difference]: With dead ends: 5117 [2021-06-05 22:42:34,883 INFO L226 Difference]: Without dead ends: 5092 [2021-06-05 22:42:34,884 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 699.9ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:42:34,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5092 states. [2021-06-05 22:42:34,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5092 to 4678. [2021-06-05 22:42:34,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 4.2640581569382086) internal successors, (19943), 4677 states have internal predecessors, (19943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 19943 transitions. [2021-06-05 22:42:34,947 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 19943 transitions. Word has length 23 [2021-06-05 22:42:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:34,947 INFO L482 AbstractCegarLoop]: Abstraction has 4678 states and 19943 transitions. [2021-06-05 22:42:34,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:34,947 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 19943 transitions. [2021-06-05 22:42:34,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:34,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:34,954 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:35,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1352 [2021-06-05 22:42:35,154 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:35,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:35,154 INFO L82 PathProgramCache]: Analyzing trace with hash -56516493, now seen corresponding path program 42 times [2021-06-05 22:42:35,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:35,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318415353] [2021-06-05 22:42:35,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:35,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:35,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318415353] [2021-06-05 22:42:35,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318415353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:35,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639269407] [2021-06-05 22:42:35,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:35,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:42:35,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:35,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:42:35,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:35,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:35,416 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:42:35,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:42:35,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:35,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:35,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:35,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:43 [2021-06-05 22:42:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:35,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639269407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:35,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:35,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:42:35,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725245651] [2021-06-05 22:42:35,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:42:35,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:35,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:42:35,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:42:35,527 INFO L87 Difference]: Start difference. First operand 4678 states and 19943 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:36,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:36,248 INFO L93 Difference]: Finished difference Result 5012 states and 21181 transitions. [2021-06-05 22:42:36,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:42:36,248 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:36,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:36,258 INFO L225 Difference]: With dead ends: 5012 [2021-06-05 22:42:36,258 INFO L226 Difference]: Without dead ends: 4991 [2021-06-05 22:42:36,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 573.9ms TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:42:36,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2021-06-05 22:42:36,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 4670. [2021-06-05 22:42:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4670 states, 4669 states have (on average 4.264296423216963) internal successors, (19910), 4669 states have internal predecessors, (19910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:36,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4670 states to 4670 states and 19910 transitions. [2021-06-05 22:42:36,320 INFO L78 Accepts]: Start accepts. Automaton has 4670 states and 19910 transitions. Word has length 23 [2021-06-05 22:42:36,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:36,320 INFO L482 AbstractCegarLoop]: Abstraction has 4670 states and 19910 transitions. [2021-06-05 22:42:36,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:36,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4670 states and 19910 transitions. [2021-06-05 22:42:36,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:36,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:36,326 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:36,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1354 [2021-06-05 22:42:36,527 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:36,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:36,527 INFO L82 PathProgramCache]: Analyzing trace with hash -466034245, now seen corresponding path program 43 times [2021-06-05 22:42:36,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:36,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859777862] [2021-06-05 22:42:36,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:36,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:36,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859777862] [2021-06-05 22:42:36,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859777862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:36,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625754085] [2021-06-05 22:42:36,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:36,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:36,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:36,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:36,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:42:36,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:36,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:36,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:36,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:42:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:36,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625754085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:36,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:36,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:36,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969874076] [2021-06-05 22:42:36,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:36,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:36,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:36,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:36,848 INFO L87 Difference]: Start difference. First operand 4670 states and 19910 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:37,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:37,721 INFO L93 Difference]: Finished difference Result 5365 states and 22589 transitions. [2021-06-05 22:42:37,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:42:37,721 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:37,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:37,730 INFO L225 Difference]: With dead ends: 5365 [2021-06-05 22:42:37,730 INFO L226 Difference]: Without dead ends: 5334 [2021-06-05 22:42:37,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 673.2ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:42:37,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2021-06-05 22:42:37,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 4674. [2021-06-05 22:42:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 4.263428204579499) internal successors, (19923), 4673 states have internal predecessors, (19923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 19923 transitions. [2021-06-05 22:42:37,797 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 19923 transitions. Word has length 23 [2021-06-05 22:42:37,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:37,797 INFO L482 AbstractCegarLoop]: Abstraction has 4674 states and 19923 transitions. [2021-06-05 22:42:37,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 19923 transitions. [2021-06-05 22:42:37,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:37,803 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:37,803 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:38,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1358 [2021-06-05 22:42:38,004 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:38,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:38,004 INFO L82 PathProgramCache]: Analyzing trace with hash 121711077, now seen corresponding path program 44 times [2021-06-05 22:42:38,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:38,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689147706] [2021-06-05 22:42:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:38,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:38,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689147706] [2021-06-05 22:42:38,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689147706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:38,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257698430] [2021-06-05 22:42:38,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:38,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:38,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:38,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:38,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:38,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:38,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:38,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:38,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:38,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:38,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:42:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:38,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257698430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:38,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:38,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:38,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978548508] [2021-06-05 22:42:38,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:38,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:38,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:38,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:38,340 INFO L87 Difference]: Start difference. First operand 4674 states and 19923 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:39,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:39,244 INFO L93 Difference]: Finished difference Result 5223 states and 22014 transitions. [2021-06-05 22:42:39,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:42:39,245 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:39,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:39,254 INFO L225 Difference]: With dead ends: 5223 [2021-06-05 22:42:39,254 INFO L226 Difference]: Without dead ends: 5198 [2021-06-05 22:42:39,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 849.5ms TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:42:39,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5198 states. [2021-06-05 22:42:39,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5198 to 4678. [2021-06-05 22:42:39,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 4.26320290784691) internal successors, (19939), 4677 states have internal predecessors, (19939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:39,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 19939 transitions. [2021-06-05 22:42:39,318 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 19939 transitions. Word has length 23 [2021-06-05 22:42:39,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:39,318 INFO L482 AbstractCegarLoop]: Abstraction has 4678 states and 19939 transitions. [2021-06-05 22:42:39,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:39,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 19939 transitions. [2021-06-05 22:42:39,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:39,325 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:39,325 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:39,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1360,626 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:39,525 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:39,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:39,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1197422233, now seen corresponding path program 45 times [2021-06-05 22:42:39,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:39,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210212775] [2021-06-05 22:42:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:39,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:39,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210212775] [2021-06-05 22:42:39,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210212775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:39,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203587274] [2021-06-05 22:42:39,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:39,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:42:39,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:39,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:39,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:39,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:39,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:39,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:39,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:39,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:39,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:42:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:39,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203587274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:39,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:39,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:39,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847071928] [2021-06-05 22:42:39,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:39,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:39,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:39,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:39,864 INFO L87 Difference]: Start difference. First operand 4678 states and 19939 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:40,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:40,947 INFO L93 Difference]: Finished difference Result 5167 states and 21801 transitions. [2021-06-05 22:42:40,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:42:40,948 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:40,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:40,957 INFO L225 Difference]: With dead ends: 5167 [2021-06-05 22:42:40,957 INFO L226 Difference]: Without dead ends: 5146 [2021-06-05 22:42:40,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 995.2ms TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:42:40,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5146 states. [2021-06-05 22:42:41,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5146 to 4670. [2021-06-05 22:42:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4670 states, 4669 states have (on average 4.263225530092097) internal successors, (19905), 4669 states have internal predecessors, (19905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:41,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4670 states to 4670 states and 19905 transitions. [2021-06-05 22:42:41,022 INFO L78 Accepts]: Start accepts. Automaton has 4670 states and 19905 transitions. Word has length 23 [2021-06-05 22:42:41,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:41,022 INFO L482 AbstractCegarLoop]: Abstraction has 4670 states and 19905 transitions. [2021-06-05 22:42:41,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:41,022 INFO L276 IsEmpty]: Start isEmpty. Operand 4670 states and 19905 transitions. [2021-06-05 22:42:41,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:41,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:41,028 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:41,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1362,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:41,229 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:41,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:41,229 INFO L82 PathProgramCache]: Analyzing trace with hash 933709631, now seen corresponding path program 46 times [2021-06-05 22:42:41,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:41,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549656645] [2021-06-05 22:42:41,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:41,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:41,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549656645] [2021-06-05 22:42:41,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549656645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:41,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088432176] [2021-06-05 22:42:41,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:41,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:41,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:41,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:41,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:41,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:41,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:42:41,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:41,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:41,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:41,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:42:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:41,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088432176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:41,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:41,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:41,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6564487] [2021-06-05 22:42:41,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:41,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:41,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:41,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:41,592 INFO L87 Difference]: Start difference. First operand 4670 states and 19905 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:42,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:42,046 INFO L93 Difference]: Finished difference Result 4938 states and 20912 transitions. [2021-06-05 22:42:42,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:42:42,046 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:42,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:42,055 INFO L225 Difference]: With dead ends: 4938 [2021-06-05 22:42:42,055 INFO L226 Difference]: Without dead ends: 4912 [2021-06-05 22:42:42,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 489.3ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:42:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4912 states. [2021-06-05 22:42:42,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4912 to 4677. [2021-06-05 22:42:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4677 states, 4676 states have (on average 4.2619760479041915) internal successors, (19929), 4676 states have internal predecessors, (19929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:42,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4677 states to 4677 states and 19929 transitions. [2021-06-05 22:42:42,118 INFO L78 Accepts]: Start accepts. Automaton has 4677 states and 19929 transitions. Word has length 23 [2021-06-05 22:42:42,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:42,118 INFO L482 AbstractCegarLoop]: Abstraction has 4677 states and 19929 transitions. [2021-06-05 22:42:42,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:42,118 INFO L276 IsEmpty]: Start isEmpty. Operand 4677 states and 19929 transitions. [2021-06-05 22:42:42,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:42,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:42,125 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:42,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1364 [2021-06-05 22:42:42,325 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:42,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:42,326 INFO L82 PathProgramCache]: Analyzing trace with hash -107866437, now seen corresponding path program 47 times [2021-06-05 22:42:42,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:42,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107084519] [2021-06-05 22:42:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:42,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:42,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107084519] [2021-06-05 22:42:42,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107084519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:42,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083007304] [2021-06-05 22:42:42,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:42,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:42:42,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:42,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:42,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:42,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:42,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:42:42,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:42,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:42,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:42,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:42:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:42,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083007304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:42,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:42,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:42,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998567033] [2021-06-05 22:42:42,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:42,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:42,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:42,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:42,671 INFO L87 Difference]: Start difference. First operand 4677 states and 19929 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:43,276 INFO L93 Difference]: Finished difference Result 4984 states and 21086 transitions. [2021-06-05 22:42:43,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:42:43,276 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:43,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:43,285 INFO L225 Difference]: With dead ends: 4984 [2021-06-05 22:42:43,285 INFO L226 Difference]: Without dead ends: 4956 [2021-06-05 22:42:43,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 531.0ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:42:43,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4956 states. [2021-06-05 22:42:43,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4956 to 4670. [2021-06-05 22:42:43,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4670 states, 4669 states have (on average 4.262582994217177) internal successors, (19902), 4669 states have internal predecessors, (19902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:43,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4670 states to 4670 states and 19902 transitions. [2021-06-05 22:42:43,350 INFO L78 Accepts]: Start accepts. Automaton has 4670 states and 19902 transitions. Word has length 23 [2021-06-05 22:42:43,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:43,350 INFO L482 AbstractCegarLoop]: Abstraction has 4670 states and 19902 transitions. [2021-06-05 22:42:43,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:43,350 INFO L276 IsEmpty]: Start isEmpty. Operand 4670 states and 19902 transitions. [2021-06-05 22:42:43,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:43,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:43,356 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:43,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1366,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:43,557 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:43,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:43,557 INFO L82 PathProgramCache]: Analyzing trace with hash -993664717, now seen corresponding path program 48 times [2021-06-05 22:42:43,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:43,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428328217] [2021-06-05 22:42:43,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:43,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:43,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428328217] [2021-06-05 22:42:43,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428328217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:43,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329160156] [2021-06-05 22:42:43,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:43,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:42:43,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:43,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:43,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:43,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:43,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:42:43,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:43,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:43,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:43,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:42:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:43,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329160156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:43,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:43,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:43,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254691673] [2021-06-05 22:42:43,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:43,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:43,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:43,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:43,886 INFO L87 Difference]: Start difference. First operand 4670 states and 19902 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:44,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:44,542 INFO L93 Difference]: Finished difference Result 5115 states and 21598 transitions. [2021-06-05 22:42:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:42:44,542 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:44,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:44,552 INFO L225 Difference]: With dead ends: 5115 [2021-06-05 22:42:44,552 INFO L226 Difference]: Without dead ends: 5081 [2021-06-05 22:42:44,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 509.0ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:42:44,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5081 states. [2021-06-05 22:42:44,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5081 to 4663. [2021-06-05 22:42:44,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 4.262977262977263) internal successors, (19874), 4662 states have internal predecessors, (19874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:44,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 19874 transitions. [2021-06-05 22:42:44,617 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 19874 transitions. Word has length 23 [2021-06-05 22:42:44,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:44,617 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 19874 transitions. [2021-06-05 22:42:44,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:44,617 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 19874 transitions. [2021-06-05 22:42:44,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:44,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:44,624 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:44,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1368,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:44,824 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:44,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:44,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1178718999, now seen corresponding path program 49 times [2021-06-05 22:42:44,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:44,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807142423] [2021-06-05 22:42:44,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:44,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:44,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807142423] [2021-06-05 22:42:44,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807142423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:44,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844438595] [2021-06-05 22:42:44,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:44,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:44,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:45,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:45,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:45,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:45,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:45,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:45,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:42:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:45,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844438595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:45,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:45,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:45,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115229957] [2021-06-05 22:42:45,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:45,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:45,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:45,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:45,174 INFO L87 Difference]: Start difference. First operand 4663 states and 19874 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:45,755 INFO L93 Difference]: Finished difference Result 4944 states and 20909 transitions. [2021-06-05 22:42:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:42:45,756 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:45,765 INFO L225 Difference]: With dead ends: 4944 [2021-06-05 22:42:45,765 INFO L226 Difference]: Without dead ends: 4918 [2021-06-05 22:42:45,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 548.5ms TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:42:45,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4918 states. [2021-06-05 22:42:45,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4918 to 4672. [2021-06-05 22:42:45,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4671 states have (on average 4.2616142153714405) internal successors, (19906), 4671 states have internal predecessors, (19906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:45,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 19906 transitions. [2021-06-05 22:42:45,829 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 19906 transitions. Word has length 23 [2021-06-05 22:42:45,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:45,829 INFO L482 AbstractCegarLoop]: Abstraction has 4672 states and 19906 transitions. [2021-06-05 22:42:45,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:45,830 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 19906 transitions. [2021-06-05 22:42:45,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:45,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:45,836 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:46,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1370 [2021-06-05 22:42:46,036 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:46,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:46,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2074672229, now seen corresponding path program 50 times [2021-06-05 22:42:46,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:46,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282018715] [2021-06-05 22:42:46,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:46,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:46,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:46,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282018715] [2021-06-05 22:42:46,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282018715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:46,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342725438] [2021-06-05 22:42:46,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:46,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:46,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:46,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:46,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:46,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:46,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:46,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:46,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:46,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:46,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:42:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:46,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342725438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:46,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:46,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:46,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575789529] [2021-06-05 22:42:46,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:46,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:46,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:46,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:46,390 INFO L87 Difference]: Start difference. First operand 4672 states and 19906 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:47,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:47,110 INFO L93 Difference]: Finished difference Result 4990 states and 21083 transitions. [2021-06-05 22:42:47,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:42:47,110 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:47,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:47,119 INFO L225 Difference]: With dead ends: 4990 [2021-06-05 22:42:47,119 INFO L226 Difference]: Without dead ends: 4962 [2021-06-05 22:42:47,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 687.1ms TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:42:47,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2021-06-05 22:42:47,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 4665. [2021-06-05 22:42:47,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 4.262864493996569) internal successors, (19882), 4664 states have internal predecessors, (19882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:47,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 19882 transitions. [2021-06-05 22:42:47,184 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 19882 transitions. Word has length 23 [2021-06-05 22:42:47,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:47,184 INFO L482 AbstractCegarLoop]: Abstraction has 4665 states and 19882 transitions. [2021-06-05 22:42:47,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:47,184 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 19882 transitions. [2021-06-05 22:42:47,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:47,191 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:47,191 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:47,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1372,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:47,391 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:47,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:47,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1787550877, now seen corresponding path program 51 times [2021-06-05 22:42:47,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:47,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59908079] [2021-06-05 22:42:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:47,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:47,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59908079] [2021-06-05 22:42:47,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59908079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:47,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29125042] [2021-06-05 22:42:47,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:47,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:42:47,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:47,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:47,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:47,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:47,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:47,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:47,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:47,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:47,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:42:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:47,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29125042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:47,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:47,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:47,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308374326] [2021-06-05 22:42:47,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:47,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:47,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:47,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:47,737 INFO L87 Difference]: Start difference. First operand 4665 states and 19882 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:48,264 INFO L93 Difference]: Finished difference Result 4940 states and 20894 transitions. [2021-06-05 22:42:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:42:48,264 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:48,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:48,274 INFO L225 Difference]: With dead ends: 4940 [2021-06-05 22:42:48,274 INFO L226 Difference]: Without dead ends: 4914 [2021-06-05 22:42:48,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 503.6ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:42:48,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4914 states. [2021-06-05 22:42:48,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4914 to 4669. [2021-06-05 22:42:48,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4669 states, 4668 states have (on average 4.262639245929734) internal successors, (19898), 4668 states have internal predecessors, (19898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:48,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4669 states to 4669 states and 19898 transitions. [2021-06-05 22:42:48,342 INFO L78 Accepts]: Start accepts. Automaton has 4669 states and 19898 transitions. Word has length 23 [2021-06-05 22:42:48,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:48,342 INFO L482 AbstractCegarLoop]: Abstraction has 4669 states and 19898 transitions. [2021-06-05 22:42:48,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:48,342 INFO L276 IsEmpty]: Start isEmpty. Operand 4669 states and 19898 transitions. [2021-06-05 22:42:48,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:48,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:48,350 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:48,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-06-05 22:42:48,550 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:48,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:48,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1294333491, now seen corresponding path program 52 times [2021-06-05 22:42:48,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:48,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278336652] [2021-06-05 22:42:48,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:48,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:48,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278336652] [2021-06-05 22:42:48,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278336652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:48,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486784914] [2021-06-05 22:42:48,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:48,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:48,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:48,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:48,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:48,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:48,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:48,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:48,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:48,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:48,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:42:48,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:48,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486784914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:48,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:48,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:48,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229699057] [2021-06-05 22:42:48,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:48,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:48,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:48,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:48,920 INFO L87 Difference]: Start difference. First operand 4669 states and 19898 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:49,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:49,762 INFO L93 Difference]: Finished difference Result 4944 states and 20916 transitions. [2021-06-05 22:42:49,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:42:49,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:49,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:49,771 INFO L225 Difference]: With dead ends: 4944 [2021-06-05 22:42:49,771 INFO L226 Difference]: Without dead ends: 4923 [2021-06-05 22:42:49,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 767.3ms TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:42:49,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4923 states. [2021-06-05 22:42:49,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4923 to 4665. [2021-06-05 22:42:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 4.262864493996569) internal successors, (19882), 4664 states have internal predecessors, (19882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 19882 transitions. [2021-06-05 22:42:49,835 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 19882 transitions. Word has length 23 [2021-06-05 22:42:49,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:49,835 INFO L482 AbstractCegarLoop]: Abstraction has 4665 states and 19882 transitions. [2021-06-05 22:42:49,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:49,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 19882 transitions. [2021-06-05 22:42:49,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:49,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:49,841 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:50,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 634 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1376 [2021-06-05 22:42:50,042 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:50,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:50,042 INFO L82 PathProgramCache]: Analyzing trace with hash -2065857549, now seen corresponding path program 53 times [2021-06-05 22:42:50,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:50,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358323438] [2021-06-05 22:42:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:50,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:50,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358323438] [2021-06-05 22:42:50,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358323438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:50,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229774450] [2021-06-05 22:42:50,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:50,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:42:50,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:50,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:50,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:50,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:50,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:50,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:50,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:50,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:50,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:42:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:50,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229774450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:50,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:50,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:50,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762467346] [2021-06-05 22:42:50,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:50,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:50,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:50,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:50,401 INFO L87 Difference]: Start difference. First operand 4665 states and 19882 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:51,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:51,130 INFO L93 Difference]: Finished difference Result 4985 states and 21067 transitions. [2021-06-05 22:42:51,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:42:51,131 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:51,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:51,139 INFO L225 Difference]: With dead ends: 4985 [2021-06-05 22:42:51,140 INFO L226 Difference]: Without dead ends: 4960 [2021-06-05 22:42:51,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 649.9ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:42:51,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4960 states. [2021-06-05 22:42:51,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4960 to 4669. [2021-06-05 22:42:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4669 states, 4668 states have (on average 4.262639245929734) internal successors, (19898), 4668 states have internal predecessors, (19898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:51,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4669 states to 4669 states and 19898 transitions. [2021-06-05 22:42:51,201 INFO L78 Accepts]: Start accepts. Automaton has 4669 states and 19898 transitions. Word has length 23 [2021-06-05 22:42:51,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:51,201 INFO L482 AbstractCegarLoop]: Abstraction has 4669 states and 19898 transitions. [2021-06-05 22:42:51,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:51,202 INFO L276 IsEmpty]: Start isEmpty. Operand 4669 states and 19898 transitions. [2021-06-05 22:42:51,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:51,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:51,208 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:51,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1378,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:51,408 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:51,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:51,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1216417215, now seen corresponding path program 54 times [2021-06-05 22:42:51,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:51,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652021336] [2021-06-05 22:42:51,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:51,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:51,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652021336] [2021-06-05 22:42:51,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652021336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:51,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478131265] [2021-06-05 22:42:51,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:51,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:42:51,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:51,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:42:51,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:51,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:51,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:51,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:51,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:51,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:51,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:42:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:51,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478131265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:51,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:51,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:51,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783747663] [2021-06-05 22:42:51,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:51,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:51,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:51,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:51,764 INFO L87 Difference]: Start difference. First operand 4669 states and 19898 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:52,541 INFO L93 Difference]: Finished difference Result 4943 states and 20912 transitions. [2021-06-05 22:42:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:42:52,542 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:52,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:52,551 INFO L225 Difference]: With dead ends: 4943 [2021-06-05 22:42:52,551 INFO L226 Difference]: Without dead ends: 4922 [2021-06-05 22:42:52,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 702.2ms TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:42:52,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4922 states. [2021-06-05 22:42:52,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4922 to 4663. [2021-06-05 22:42:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 4.262977262977263) internal successors, (19874), 4662 states have internal predecessors, (19874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:52,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 19874 transitions. [2021-06-05 22:42:52,618 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 19874 transitions. Word has length 23 [2021-06-05 22:42:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:52,618 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 19874 transitions. [2021-06-05 22:42:52,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:52,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 19874 transitions. [2021-06-05 22:42:52,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:52,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:52,624 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:52,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1380,636 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:52,824 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:52,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:52,825 INFO L82 PathProgramCache]: Analyzing trace with hash -501068955, now seen corresponding path program 55 times [2021-06-05 22:42:52,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:52,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789491744] [2021-06-05 22:42:52,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:52,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:52,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789491744] [2021-06-05 22:42:52,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789491744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:52,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056332961] [2021-06-05 22:42:52,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:52,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:52,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:53,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:53,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:42:53,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:53,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:53,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:53,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:42:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:53,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056332961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:53,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:53,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:53,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202778931] [2021-06-05 22:42:53,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:53,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:53,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:53,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:53,151 INFO L87 Difference]: Start difference. First operand 4663 states and 19874 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:53,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:53,899 INFO L93 Difference]: Finished difference Result 5163 states and 21779 transitions. [2021-06-05 22:42:53,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:42:53,899 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:53,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:53,908 INFO L225 Difference]: With dead ends: 5163 [2021-06-05 22:42:53,909 INFO L226 Difference]: Without dead ends: 5132 [2021-06-05 22:42:53,909 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 558.3ms TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:42:53,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-06-05 22:42:53,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 4663. [2021-06-05 22:42:53,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 4.261261261261262) internal successors, (19866), 4662 states have internal predecessors, (19866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:53,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 19866 transitions. [2021-06-05 22:42:53,973 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 19866 transitions. Word has length 23 [2021-06-05 22:42:53,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:53,973 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 19866 transitions. [2021-06-05 22:42:53,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:53,973 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 19866 transitions. [2021-06-05 22:42:53,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:53,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:53,980 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:54,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1382,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:54,180 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:54,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:54,180 INFO L82 PathProgramCache]: Analyzing trace with hash 539166843, now seen corresponding path program 56 times [2021-06-05 22:42:54,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:54,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690116789] [2021-06-05 22:42:54,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:54,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:54,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690116789] [2021-06-05 22:42:54,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690116789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:54,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221141527] [2021-06-05 22:42:54,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:54,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:54,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:54,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:54,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:54,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:54,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:54,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:54,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:54,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:54,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:42:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:54,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221141527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:54,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:54,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:54,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573071009] [2021-06-05 22:42:54,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:54,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:54,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:54,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:54,520 INFO L87 Difference]: Start difference. First operand 4663 states and 19866 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:55,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:55,462 INFO L93 Difference]: Finished difference Result 5077 states and 21424 transitions. [2021-06-05 22:42:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:42:55,462 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:55,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:55,471 INFO L225 Difference]: With dead ends: 5077 [2021-06-05 22:42:55,471 INFO L226 Difference]: Without dead ends: 5052 [2021-06-05 22:42:55,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 763.6ms TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:42:55,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5052 states. [2021-06-05 22:42:55,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5052 to 4667. [2021-06-05 22:42:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 4.2610372910415775) internal successors, (19882), 4666 states have internal predecessors, (19882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 19882 transitions. [2021-06-05 22:42:55,534 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 19882 transitions. Word has length 23 [2021-06-05 22:42:55,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:55,534 INFO L482 AbstractCegarLoop]: Abstraction has 4667 states and 19882 transitions. [2021-06-05 22:42:55,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 19882 transitions. [2021-06-05 22:42:55,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:55,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:55,540 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:55,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1384,638 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:55,741 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:55,741 INFO L82 PathProgramCache]: Analyzing trace with hash -473525689, now seen corresponding path program 57 times [2021-06-05 22:42:55,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:55,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702087951] [2021-06-05 22:42:55,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:55,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:55,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702087951] [2021-06-05 22:42:55,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702087951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:55,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280933500] [2021-06-05 22:42:55,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:55,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:42:55,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:55,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:55,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:55,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:55,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:42:55,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:55,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:55,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:55,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:42:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:56,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280933500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:56,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:56,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:42:56,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592087668] [2021-06-05 22:42:56,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:42:56,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:56,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:42:56,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:42:56,081 INFO L87 Difference]: Start difference. First operand 4667 states and 19882 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:57,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:57,054 INFO L93 Difference]: Finished difference Result 5027 states and 21235 transitions. [2021-06-05 22:42:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:42:57,055 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:57,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:57,063 INFO L225 Difference]: With dead ends: 5027 [2021-06-05 22:42:57,063 INFO L226 Difference]: Without dead ends: 5006 [2021-06-05 22:42:57,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 851.4ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:42:57,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-06-05 22:42:57,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4657. [2021-06-05 22:42:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 4.260738831615121) internal successors, (19838), 4656 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 19838 transitions. [2021-06-05 22:42:57,126 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 19838 transitions. Word has length 23 [2021-06-05 22:42:57,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:57,126 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 19838 transitions. [2021-06-05 22:42:57,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:57,126 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 19838 transitions. [2021-06-05 22:42:57,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:57,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:57,132 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:57,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1386,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:57,333 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:57,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:57,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1215002995, now seen corresponding path program 58 times [2021-06-05 22:42:57,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:57,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756140088] [2021-06-05 22:42:57,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:57,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:57,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756140088] [2021-06-05 22:42:57,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756140088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:57,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919516047] [2021-06-05 22:42:57,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:57,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:57,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:57,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:57,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:57,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:57,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:42:57,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:57,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:57,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:57,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:42:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:57,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919516047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:57,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:57,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:42:57,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051100805] [2021-06-05 22:42:57,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:42:57,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:57,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:42:57,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:42:57,641 INFO L87 Difference]: Start difference. First operand 4657 states and 19838 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:58,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:58,348 INFO L93 Difference]: Finished difference Result 5345 states and 22489 transitions. [2021-06-05 22:42:58,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:42:58,348 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:58,358 INFO L225 Difference]: With dead ends: 5345 [2021-06-05 22:42:58,358 INFO L226 Difference]: Without dead ends: 5336 [2021-06-05 22:42:58,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 519.8ms TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:42:58,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5336 states. [2021-06-05 22:42:58,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5336 to 4668. [2021-06-05 22:42:58,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 4667 states have (on average 4.261409899292907) internal successors, (19888), 4667 states have internal predecessors, (19888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:58,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 19888 transitions. [2021-06-05 22:42:58,423 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 19888 transitions. Word has length 23 [2021-06-05 22:42:58,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:58,423 INFO L482 AbstractCegarLoop]: Abstraction has 4668 states and 19888 transitions. [2021-06-05 22:42:58,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:58,423 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 19888 transitions. [2021-06-05 22:42:58,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:58,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:58,430 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:58,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1388 [2021-06-05 22:42:58,630 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:42:58,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:58,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1334680265, now seen corresponding path program 59 times [2021-06-05 22:42:58,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:58,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787261401] [2021-06-05 22:42:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:58,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:58,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787261401] [2021-06-05 22:42:58,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787261401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:58,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6558596] [2021-06-05 22:42:58,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:58,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:42:58,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:58,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:42:58,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:58,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:58,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:42:58,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:58,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:58,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:58,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:42:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:58,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6558596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:58,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:58,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:42:58,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460504157] [2021-06-05 22:42:58,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:42:58,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:58,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:42:58,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:42:58,959 INFO L87 Difference]: Start difference. First operand 4668 states and 19888 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:59,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:59,768 INFO L93 Difference]: Finished difference Result 5157 states and 21755 transitions. [2021-06-05 22:42:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:42:59,768 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:42:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:59,778 INFO L225 Difference]: With dead ends: 5157 [2021-06-05 22:42:59,778 INFO L226 Difference]: Without dead ends: 5148 [2021-06-05 22:42:59,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 635.9ms TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:42:59,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5148 states. [2021-06-05 22:42:59,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5148 to 4672. [2021-06-05 22:42:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4671 states have (on average 4.26182830229073) internal successors, (19907), 4671 states have internal predecessors, (19907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 19907 transitions. [2021-06-05 22:42:59,841 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 19907 transitions. Word has length 23 [2021-06-05 22:42:59,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:59,841 INFO L482 AbstractCegarLoop]: Abstraction has 4672 states and 19907 transitions. [2021-06-05 22:42:59,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:42:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 19907 transitions. [2021-06-05 22:42:59,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:42:59,848 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:59,848 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:00,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1390 [2021-06-05 22:43:00,048 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:00,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1918710963, now seen corresponding path program 60 times [2021-06-05 22:43:00,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:00,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724781363] [2021-06-05 22:43:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:00,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:00,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724781363] [2021-06-05 22:43:00,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724781363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:00,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557936764] [2021-06-05 22:43:00,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:00,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:43:00,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:00,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:00,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:00,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:00,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 22:43:00,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:00,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:00,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:00,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:39 [2021-06-05 22:43:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:00,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557936764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:00,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:00,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:43:00,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749054962] [2021-06-05 22:43:00,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:43:00,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:00,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:43:00,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:43:00,390 INFO L87 Difference]: Start difference. First operand 4672 states and 19907 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:01,176 INFO L93 Difference]: Finished difference Result 5174 states and 21822 transitions. [2021-06-05 22:43:01,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:43:01,176 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:01,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:01,185 INFO L225 Difference]: With dead ends: 5174 [2021-06-05 22:43:01,186 INFO L226 Difference]: Without dead ends: 5165 [2021-06-05 22:43:01,186 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 605.9ms TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:43:01,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2021-06-05 22:43:01,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 4657. [2021-06-05 22:43:01,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 4.260738831615121) internal successors, (19838), 4656 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 19838 transitions. [2021-06-05 22:43:01,249 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 19838 transitions. Word has length 23 [2021-06-05 22:43:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:01,250 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 19838 transitions. [2021-06-05 22:43:01,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:01,250 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 19838 transitions. [2021-06-05 22:43:01,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:01,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:01,256 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:01,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1392,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:01,457 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:01,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:01,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1692829853, now seen corresponding path program 61 times [2021-06-05 22:43:01,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:01,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682223977] [2021-06-05 22:43:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:01,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:01,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:01,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682223977] [2021-06-05 22:43:01,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682223977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:01,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300454211] [2021-06-05 22:43:01,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:01,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:01,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:01,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:01,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:43:01,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:01,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:01,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:01,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:43:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:01,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300454211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:01,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:01,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:43:01,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450510789] [2021-06-05 22:43:01,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:43:01,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:01,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:43:01,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:43:01,784 INFO L87 Difference]: Start difference. First operand 4657 states and 19838 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:02,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:02,400 INFO L93 Difference]: Finished difference Result 4859 states and 20578 transitions. [2021-06-05 22:43:02,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:43:02,401 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:02,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:02,409 INFO L225 Difference]: With dead ends: 4859 [2021-06-05 22:43:02,409 INFO L226 Difference]: Without dead ends: 4850 [2021-06-05 22:43:02,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 530.1ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:43:02,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4850 states. [2021-06-05 22:43:02,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4850 to 4668. [2021-06-05 22:43:02,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 4667 states have (on average 4.262052710520677) internal successors, (19891), 4667 states have internal predecessors, (19891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:02,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 19891 transitions. [2021-06-05 22:43:02,470 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 19891 transitions. Word has length 23 [2021-06-05 22:43:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:02,470 INFO L482 AbstractCegarLoop]: Abstraction has 4668 states and 19891 transitions. [2021-06-05 22:43:02,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:02,470 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 19891 transitions. [2021-06-05 22:43:02,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:02,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:02,477 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:02,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1394,643 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:02,677 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:02,677 INFO L82 PathProgramCache]: Analyzing trace with hash 651253785, now seen corresponding path program 62 times [2021-06-05 22:43:02,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:02,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978691206] [2021-06-05 22:43:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:02,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:02,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978691206] [2021-06-05 22:43:02,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978691206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:02,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550696465] [2021-06-05 22:43:02,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:02,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:02,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:02,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:02,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:02,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:02,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:43:02,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:02,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:02,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:02,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:43:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:03,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550696465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:03,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:03,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:43:03,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729363271] [2021-06-05 22:43:03,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:43:03,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:03,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:43:03,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:43:03,002 INFO L87 Difference]: Start difference. First operand 4668 states and 19891 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:03,667 INFO L93 Difference]: Finished difference Result 4888 states and 20691 transitions. [2021-06-05 22:43:03,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:43:03,667 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:03,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:03,676 INFO L225 Difference]: With dead ends: 4888 [2021-06-05 22:43:03,676 INFO L226 Difference]: Without dead ends: 4879 [2021-06-05 22:43:03,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 574.5ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:43:03,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2021-06-05 22:43:03,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4664. [2021-06-05 22:43:03,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4664 states, 4663 states have (on average 4.261634141110873) internal successors, (19872), 4663 states have internal predecessors, (19872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4664 states to 4664 states and 19872 transitions. [2021-06-05 22:43:03,738 INFO L78 Accepts]: Start accepts. Automaton has 4664 states and 19872 transitions. Word has length 23 [2021-06-05 22:43:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:03,738 INFO L482 AbstractCegarLoop]: Abstraction has 4664 states and 19872 transitions. [2021-06-05 22:43:03,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 4664 states and 19872 transitions. [2021-06-05 22:43:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:03,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:03,745 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:03,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 644 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1396 [2021-06-05 22:43:03,945 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:03,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:03,945 INFO L82 PathProgramCache]: Analyzing trace with hash -234544495, now seen corresponding path program 63 times [2021-06-05 22:43:03,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:03,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127092733] [2021-06-05 22:43:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:04,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:04,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127092733] [2021-06-05 22:43:04,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127092733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:04,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855682235] [2021-06-05 22:43:04,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:04,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:43:04,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:04,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:04,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:04,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:04,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:43:04,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:04,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:04,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:04,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:43:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:04,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855682235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:04,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:04,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:43:04,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451688524] [2021-06-05 22:43:04,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:43:04,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:04,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:43:04,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:43:04,265 INFO L87 Difference]: Start difference. First operand 4664 states and 19872 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:04,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:04,856 INFO L93 Difference]: Finished difference Result 5023 states and 21209 transitions. [2021-06-05 22:43:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:43:04,857 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:04,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:04,865 INFO L225 Difference]: With dead ends: 5023 [2021-06-05 22:43:04,866 INFO L226 Difference]: Without dead ends: 5014 [2021-06-05 22:43:04,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 507.5ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:43:04,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5014 states. [2021-06-05 22:43:04,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5014 to 4657. [2021-06-05 22:43:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 4.260738831615121) internal successors, (19838), 4656 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:04,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 19838 transitions. [2021-06-05 22:43:04,928 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 19838 transitions. Word has length 23 [2021-06-05 22:43:04,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:04,928 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 19838 transitions. [2021-06-05 22:43:04,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:04,928 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 19838 transitions. [2021-06-05 22:43:04,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:04,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:04,935 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:05,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1398 [2021-06-05 22:43:05,135 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:05,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:05,135 INFO L82 PathProgramCache]: Analyzing trace with hash 154224905, now seen corresponding path program 64 times [2021-06-05 22:43:05,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:05,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996450863] [2021-06-05 22:43:05,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:05,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:05,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996450863] [2021-06-05 22:43:05,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996450863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:05,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182620393] [2021-06-05 22:43:05,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:05,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:43:05,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:05,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:05,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:05,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:05,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:43:05,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:05,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:05,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:05,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:43:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:05,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182620393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:05,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:05,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:43:05,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528914985] [2021-06-05 22:43:05,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:43:05,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:05,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:43:05,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:43:05,441 INFO L87 Difference]: Start difference. First operand 4657 states and 19838 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:06,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:06,187 INFO L93 Difference]: Finished difference Result 5203 states and 21933 transitions. [2021-06-05 22:43:06,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:43:06,187 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:06,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:06,196 INFO L225 Difference]: With dead ends: 5203 [2021-06-05 22:43:06,197 INFO L226 Difference]: Without dead ends: 5194 [2021-06-05 22:43:06,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 488.8ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:43:06,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-06-05 22:43:06,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 4653. [2021-06-05 22:43:06,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 4.258813413585554) internal successors, (19812), 4652 states have internal predecessors, (19812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:06,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 19812 transitions. [2021-06-05 22:43:06,260 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 19812 transitions. Word has length 23 [2021-06-05 22:43:06,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:06,260 INFO L482 AbstractCegarLoop]: Abstraction has 4653 states and 19812 transitions. [2021-06-05 22:43:06,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:06,260 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 19812 transitions. [2021-06-05 22:43:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:06,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:06,266 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:06,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 646 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1400 [2021-06-05 22:43:06,467 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:06,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:06,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1899508941, now seen corresponding path program 65 times [2021-06-05 22:43:06,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:06,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32812204] [2021-06-05 22:43:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:06,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:06,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32812204] [2021-06-05 22:43:06,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32812204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:06,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598460192] [2021-06-05 22:43:06,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:06,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:43:06,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:06,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:06,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:06,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:06,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:43:06,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:06,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:06,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:06,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:43:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:06,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598460192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:06,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:06,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:43:06,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496230084] [2021-06-05 22:43:06,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:43:06,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:06,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:43:06,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:43:06,796 INFO L87 Difference]: Start difference. First operand 4653 states and 19812 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:07,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:07,728 INFO L93 Difference]: Finished difference Result 5199 states and 21904 transitions. [2021-06-05 22:43:07,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:43:07,728 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:07,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:07,737 INFO L225 Difference]: With dead ends: 5199 [2021-06-05 22:43:07,738 INFO L226 Difference]: Without dead ends: 5190 [2021-06-05 22:43:07,738 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 717.1ms TimeCoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:43:07,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2021-06-05 22:43:07,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 4665. [2021-06-05 22:43:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 4.2602915951972555) internal successors, (19870), 4664 states have internal predecessors, (19870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 19870 transitions. [2021-06-05 22:43:07,801 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 19870 transitions. Word has length 23 [2021-06-05 22:43:07,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:07,801 INFO L482 AbstractCegarLoop]: Abstraction has 4665 states and 19870 transitions. [2021-06-05 22:43:07,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:07,802 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 19870 transitions. [2021-06-05 22:43:07,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:07,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:07,808 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:08,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1402,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:08,008 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:08,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:08,009 INFO L82 PathProgramCache]: Analyzing trace with hash 857932873, now seen corresponding path program 66 times [2021-06-05 22:43:08,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:08,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268468139] [2021-06-05 22:43:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:08,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:08,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268468139] [2021-06-05 22:43:08,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268468139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:08,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83231153] [2021-06-05 22:43:08,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:08,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:43:08,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:08,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:08,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:08,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:08,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:43:08,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:08,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:08,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:08,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:43:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:08,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83231153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:08,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:08,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:43:08,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857216067] [2021-06-05 22:43:08,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:43:08,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:08,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:43:08,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:43:08,334 INFO L87 Difference]: Start difference. First operand 4665 states and 19870 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:09,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:09,312 INFO L93 Difference]: Finished difference Result 5322 states and 22409 transitions. [2021-06-05 22:43:09,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:43:09,312 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:09,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:09,321 INFO L225 Difference]: With dead ends: 5322 [2021-06-05 22:43:09,321 INFO L226 Difference]: Without dead ends: 5313 [2021-06-05 22:43:09,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 705.6ms TimeCoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:43:09,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2021-06-05 22:43:09,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 4653. [2021-06-05 22:43:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 4.258813413585554) internal successors, (19812), 4652 states have internal predecessors, (19812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:09,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 19812 transitions. [2021-06-05 22:43:09,386 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 19812 transitions. Word has length 23 [2021-06-05 22:43:09,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:09,386 INFO L482 AbstractCegarLoop]: Abstraction has 4653 states and 19812 transitions. [2021-06-05 22:43:09,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:09,386 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 19812 transitions. [2021-06-05 22:43:09,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:09,393 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:09,393 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:09,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 648 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1404 [2021-06-05 22:43:09,593 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:09,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:09,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1914277845, now seen corresponding path program 67 times [2021-06-05 22:43:09,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:09,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716857930] [2021-06-05 22:43:09,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:09,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:09,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716857930] [2021-06-05 22:43:09,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716857930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:09,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134165448] [2021-06-05 22:43:09,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:09,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:09,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:09,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:09,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:43:09,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:09,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:09,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:09,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:43:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:09,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134165448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:09,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:09,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:43:09,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928008302] [2021-06-05 22:43:09,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:43:09,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:09,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:43:09,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:43:09,904 INFO L87 Difference]: Start difference. First operand 4653 states and 19812 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:10,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:10,605 INFO L93 Difference]: Finished difference Result 5745 states and 24061 transitions. [2021-06-05 22:43:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:43:10,605 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:10,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:10,615 INFO L225 Difference]: With dead ends: 5745 [2021-06-05 22:43:10,616 INFO L226 Difference]: Without dead ends: 5727 [2021-06-05 22:43:10,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 512.1ms TimeCoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:43:10,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5727 states. [2021-06-05 22:43:10,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5727 to 4659. [2021-06-05 22:43:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 4.260197509660799) internal successors, (19844), 4658 states have internal predecessors, (19844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:10,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 19844 transitions. [2021-06-05 22:43:10,683 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 19844 transitions. Word has length 23 [2021-06-05 22:43:10,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:10,683 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 19844 transitions. [2021-06-05 22:43:10,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:10,683 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 19844 transitions. [2021-06-05 22:43:10,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:10,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:10,689 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:10,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1406,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:10,889 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:10,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:10,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1109878621, now seen corresponding path program 68 times [2021-06-05 22:43:10,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:10,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266726974] [2021-06-05 22:43:10,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:10,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:10,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266726974] [2021-06-05 22:43:10,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266726974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:10,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953477424] [2021-06-05 22:43:10,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:11,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:11,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:11,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:11,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:11,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:11,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:43:11,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:11,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:11,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:11,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:43:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:11,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953477424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:11,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:11,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:43:11,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69031142] [2021-06-05 22:43:11,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:43:11,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:11,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:43:11,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:43:11,217 INFO L87 Difference]: Start difference. First operand 4659 states and 19844 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:12,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:12,122 INFO L93 Difference]: Finished difference Result 5468 states and 22983 transitions. [2021-06-05 22:43:12,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:43:12,122 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:12,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:12,132 INFO L225 Difference]: With dead ends: 5468 [2021-06-05 22:43:12,132 INFO L226 Difference]: Without dead ends: 5450 [2021-06-05 22:43:12,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 648.6ms TimeCoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:43:12,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2021-06-05 22:43:12,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 4661. [2021-06-05 22:43:12,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 4.259656652360515) internal successors, (19850), 4660 states have internal predecessors, (19850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:12,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 19850 transitions. [2021-06-05 22:43:12,199 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 19850 transitions. Word has length 23 [2021-06-05 22:43:12,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:12,199 INFO L482 AbstractCegarLoop]: Abstraction has 4661 states and 19850 transitions. [2021-06-05 22:43:12,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 19850 transitions. [2021-06-05 22:43:12,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:12,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:12,206 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:12,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1408,650 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:12,406 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:12,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:12,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1571521941, now seen corresponding path program 69 times [2021-06-05 22:43:12,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:12,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310853669] [2021-06-05 22:43:12,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:12,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:12,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310853669] [2021-06-05 22:43:12,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310853669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:12,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730553982] [2021-06-05 22:43:12,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:12,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:43:12,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:12,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:12,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:12,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:12,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:43:12,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:12,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:12,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:12,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:43:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:12,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730553982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:12,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:12,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:43:12,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058741815] [2021-06-05 22:43:12,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:43:12,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:12,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:43:12,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:43:12,736 INFO L87 Difference]: Start difference. First operand 4661 states and 19850 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:13,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:13,487 INFO L93 Difference]: Finished difference Result 5397 states and 22710 transitions. [2021-06-05 22:43:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:43:13,487 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:13,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:13,497 INFO L225 Difference]: With dead ends: 5397 [2021-06-05 22:43:13,497 INFO L226 Difference]: Without dead ends: 5375 [2021-06-05 22:43:13,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 599.0ms TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5375 states. [2021-06-05 22:43:13,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5375 to 4657. [2021-06-05 22:43:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 4.260738831615121) internal successors, (19838), 4656 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:13,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 19838 transitions. [2021-06-05 22:43:13,564 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 19838 transitions. Word has length 23 [2021-06-05 22:43:13,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:13,564 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 19838 transitions. [2021-06-05 22:43:13,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:13,564 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 19838 transitions. [2021-06-05 22:43:13,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:13,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:13,571 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:13,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1410 [2021-06-05 22:43:13,771 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:13,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:13,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1480376867, now seen corresponding path program 70 times [2021-06-05 22:43:13,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:13,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597625303] [2021-06-05 22:43:13,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:13,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:13,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597625303] [2021-06-05 22:43:13,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597625303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:13,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648544931] [2021-06-05 22:43:13,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:13,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:43:13,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:13,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:13,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:13,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:13,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 22:43:13,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:14,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:14,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:14,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 22:43:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:14,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648544931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:14,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:14,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:43:14,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987694250] [2021-06-05 22:43:14,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:43:14,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:14,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:43:14,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:43:14,151 INFO L87 Difference]: Start difference. First operand 4657 states and 19838 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:15,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:15,126 INFO L93 Difference]: Finished difference Result 5103 states and 21551 transitions. [2021-06-05 22:43:15,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:43:15,127 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:15,136 INFO L225 Difference]: With dead ends: 5103 [2021-06-05 22:43:15,136 INFO L226 Difference]: Without dead ends: 5094 [2021-06-05 22:43:15,136 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 816.9ms TimeCoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:43:15,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5094 states. [2021-06-05 22:43:15,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5094 to 4663. [2021-06-05 22:43:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 4.261046761046761) internal successors, (19865), 4662 states have internal predecessors, (19865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:15,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 19865 transitions. [2021-06-05 22:43:15,199 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 19865 transitions. Word has length 23 [2021-06-05 22:43:15,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:15,199 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 19865 transitions. [2021-06-05 22:43:15,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:15,199 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 19865 transitions. [2021-06-05 22:43:15,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:15,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:15,206 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:15,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1412 [2021-06-05 22:43:15,406 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:15,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:15,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1773014361, now seen corresponding path program 71 times [2021-06-05 22:43:15,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:15,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950156565] [2021-06-05 22:43:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:15,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:15,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950156565] [2021-06-05 22:43:15,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950156565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:15,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320392828] [2021-06-05 22:43:15,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:15,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:43:15,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:15,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:15,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:15,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:15,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:43:15,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:15,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:15,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:15,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:43:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:15,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320392828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:15,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:15,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:43:15,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800058564] [2021-06-05 22:43:15,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:43:15,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:15,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:43:15,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:43:15,740 INFO L87 Difference]: Start difference. First operand 4663 states and 19865 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:16,683 INFO L93 Difference]: Finished difference Result 5182 states and 21862 transitions. [2021-06-05 22:43:16,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:43:16,683 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:16,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:16,692 INFO L225 Difference]: With dead ends: 5182 [2021-06-05 22:43:16,693 INFO L226 Difference]: Without dead ends: 5173 [2021-06-05 22:43:16,693 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 744.8ms TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:43:16,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5173 states. [2021-06-05 22:43:16,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5173 to 4659. [2021-06-05 22:43:16,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 4.260626878488622) internal successors, (19846), 4658 states have internal predecessors, (19846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:16,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 19846 transitions. [2021-06-05 22:43:16,777 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 19846 transitions. Word has length 23 [2021-06-05 22:43:16,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:16,777 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 19846 transitions. [2021-06-05 22:43:16,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:16,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 19846 transitions. [2021-06-05 22:43:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:16,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:16,784 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:16,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1414,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:16,984 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:16,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:16,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1485893009, now seen corresponding path program 72 times [2021-06-05 22:43:16,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:16,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149830164] [2021-06-05 22:43:16,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:17,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:17,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149830164] [2021-06-05 22:43:17,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149830164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:17,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930422918] [2021-06-05 22:43:17,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:17,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:43:17,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:17,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:17,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:17,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:17,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 22:43:17,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:17,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:17,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:17,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:41 [2021-06-05 22:43:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:17,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930422918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:17,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:17,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:43:17,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241859527] [2021-06-05 22:43:17,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:43:17,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:17,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:43:17,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:43:17,346 INFO L87 Difference]: Start difference. First operand 4659 states and 19846 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:18,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:18,249 INFO L93 Difference]: Finished difference Result 5079 states and 21456 transitions. [2021-06-05 22:43:18,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:43:18,249 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:18,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:18,259 INFO L225 Difference]: With dead ends: 5079 [2021-06-05 22:43:18,259 INFO L226 Difference]: Without dead ends: 5070 [2021-06-05 22:43:18,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 761.5ms TimeCoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:43:18,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5070 states. [2021-06-05 22:43:18,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5070 to 4663. [2021-06-05 22:43:18,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 4.26040326040326) internal successors, (19862), 4662 states have internal predecessors, (19862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:18,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 19862 transitions. [2021-06-05 22:43:18,328 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 19862 transitions. Word has length 23 [2021-06-05 22:43:18,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:18,328 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 19862 transitions. [2021-06-05 22:43:18,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:18,328 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 19862 transitions. [2021-06-05 22:43:18,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:18,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:18,334 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:18,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1416,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:18,535 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:18,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:18,535 INFO L82 PathProgramCache]: Analyzing trace with hash 992675623, now seen corresponding path program 73 times [2021-06-05 22:43:18,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:18,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483432806] [2021-06-05 22:43:18,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:18,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:18,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483432806] [2021-06-05 22:43:18,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483432806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:18,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213176912] [2021-06-05 22:43:18,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:18,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:18,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:18,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:18,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 22:43:18,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:18,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:18,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:18,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 22:43:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:18,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213176912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:18,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:18,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:43:18,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132804482] [2021-06-05 22:43:18,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:43:18,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:18,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:43:18,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:43:18,891 INFO L87 Difference]: Start difference. First operand 4663 states and 19862 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:19,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:19,786 INFO L93 Difference]: Finished difference Result 5005 states and 21170 transitions. [2021-06-05 22:43:19,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:43:19,786 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:19,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:19,795 INFO L225 Difference]: With dead ends: 5005 [2021-06-05 22:43:19,795 INFO L226 Difference]: Without dead ends: 4994 [2021-06-05 22:43:19,795 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 728.6ms TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:43:19,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4994 states. [2021-06-05 22:43:19,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4994 to 4659. [2021-06-05 22:43:19,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 4.260626878488622) internal successors, (19846), 4658 states have internal predecessors, (19846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 19846 transitions. [2021-06-05 22:43:19,857 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 19846 transitions. Word has length 23 [2021-06-05 22:43:19,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:19,857 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 19846 transitions. [2021-06-05 22:43:19,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:19,857 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 19846 transitions. [2021-06-05 22:43:19,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:19,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:19,863 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:20,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1418,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:20,064 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:20,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1927451879, now seen corresponding path program 74 times [2021-06-05 22:43:20,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:20,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540541434] [2021-06-05 22:43:20,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:20,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:20,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540541434] [2021-06-05 22:43:20,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540541434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:20,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828232089] [2021-06-05 22:43:20,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:20,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:20,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:20,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:20,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:20,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:20,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 22:43:20,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:20,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:20,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:20,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:41 [2021-06-05 22:43:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:20,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828232089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:20,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:20,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:43:20,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650824411] [2021-06-05 22:43:20,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:43:20,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:20,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:43:20,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:43:20,408 INFO L87 Difference]: Start difference. First operand 4659 states and 19846 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:21,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:21,356 INFO L93 Difference]: Finished difference Result 5193 states and 21910 transitions. [2021-06-05 22:43:21,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:43:21,356 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:21,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:21,365 INFO L225 Difference]: With dead ends: 5193 [2021-06-05 22:43:21,365 INFO L226 Difference]: Without dead ends: 5184 [2021-06-05 22:43:21,366 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 750.6ms TimeCoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:43:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5184 states. [2021-06-05 22:43:21,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5184 to 4663. [2021-06-05 22:43:21,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 4.26040326040326) internal successors, (19862), 4662 states have internal predecessors, (19862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 19862 transitions. [2021-06-05 22:43:21,428 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 19862 transitions. Word has length 23 [2021-06-05 22:43:21,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:21,428 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 19862 transitions. [2021-06-05 22:43:21,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 19862 transitions. [2021-06-05 22:43:21,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:21,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:21,435 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:21,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 656 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1420 [2021-06-05 22:43:21,635 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:21,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:21,635 INFO L82 PathProgramCache]: Analyzing trace with hash 914759347, now seen corresponding path program 75 times [2021-06-05 22:43:21,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:21,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223150912] [2021-06-05 22:43:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:21,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:21,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223150912] [2021-06-05 22:43:21,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223150912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:21,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217898565] [2021-06-05 22:43:21,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:21,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:43:21,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:21,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:21,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:21,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:21,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:43:21,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:21,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:21,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:21,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:43:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:21,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217898565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:21,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:21,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:43:21,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888826191] [2021-06-05 22:43:21,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:43:21,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:21,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:43:21,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:43:21,980 INFO L87 Difference]: Start difference. First operand 4663 states and 19862 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:22,967 INFO L93 Difference]: Finished difference Result 5032 states and 21278 transitions. [2021-06-05 22:43:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:43:22,967 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:22,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:22,976 INFO L225 Difference]: With dead ends: 5032 [2021-06-05 22:43:22,976 INFO L226 Difference]: Without dead ends: 5021 [2021-06-05 22:43:22,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 768.9ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:43:22,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5021 states. [2021-06-05 22:43:23,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5021 to 4657. [2021-06-05 22:43:23,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 4.260738831615121) internal successors, (19838), 4656 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 19838 transitions. [2021-06-05 22:43:23,038 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 19838 transitions. Word has length 23 [2021-06-05 22:43:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:23,038 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 19838 transitions. [2021-06-05 22:43:23,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 19838 transitions. [2021-06-05 22:43:23,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:23,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:23,044 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:23,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1422 [2021-06-05 22:43:23,245 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:23,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:23,245 INFO L82 PathProgramCache]: Analyzing trace with hash -4415091, now seen corresponding path program 76 times [2021-06-05 22:43:23,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:23,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135957096] [2021-06-05 22:43:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:23,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:23,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135957096] [2021-06-05 22:43:23,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135957096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:23,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290247589] [2021-06-05 22:43:23,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:23,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:43:23,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:23,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:23,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:23,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:23,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:43:23,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:23,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:23,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:23,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:43:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:23,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290247589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:23,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:23,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:43:23,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037793675] [2021-06-05 22:43:23,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:43:23,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:23,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:43:23,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:43:23,573 INFO L87 Difference]: Start difference. First operand 4657 states and 19838 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:24,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:24,174 INFO L93 Difference]: Finished difference Result 4850 states and 20558 transitions. [2021-06-05 22:43:24,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:43:24,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:24,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:24,183 INFO L225 Difference]: With dead ends: 4850 [2021-06-05 22:43:24,183 INFO L226 Difference]: Without dead ends: 4841 [2021-06-05 22:43:24,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 514.5ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:43:24,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4841 states. [2021-06-05 22:43:24,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4841 to 4664. [2021-06-05 22:43:24,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4664 states, 4663 states have (on average 4.260776324254771) internal successors, (19868), 4663 states have internal predecessors, (19868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:24,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4664 states to 4664 states and 19868 transitions. [2021-06-05 22:43:24,244 INFO L78 Accepts]: Start accepts. Automaton has 4664 states and 19868 transitions. Word has length 23 [2021-06-05 22:43:24,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:24,244 INFO L482 AbstractCegarLoop]: Abstraction has 4664 states and 19868 transitions. [2021-06-05 22:43:24,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:24,244 INFO L276 IsEmpty]: Start isEmpty. Operand 4664 states and 19868 transitions. [2021-06-05 22:43:24,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:24,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:24,250 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:24,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1424 [2021-06-05 22:43:24,451 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:24,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:24,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1045991159, now seen corresponding path program 77 times [2021-06-05 22:43:24,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:24,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360899067] [2021-06-05 22:43:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:24,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:24,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360899067] [2021-06-05 22:43:24,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360899067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:24,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184266209] [2021-06-05 22:43:24,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:24,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:43:24,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:24,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:24,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:24,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:24,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:43:24,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:24,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:24,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:24,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 22:43:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:24,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184266209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:24,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:24,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:43:24,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034350365] [2021-06-05 22:43:24,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:43:24,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:24,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:43:24,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:43:24,780 INFO L87 Difference]: Start difference. First operand 4664 states and 19868 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:25,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:25,489 INFO L93 Difference]: Finished difference Result 4877 states and 20663 transitions. [2021-06-05 22:43:25,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:43:25,489 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:25,497 INFO L225 Difference]: With dead ends: 4877 [2021-06-05 22:43:25,497 INFO L226 Difference]: Without dead ends: 4868 [2021-06-05 22:43:25,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 607.2ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:43:25,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4868 states. [2021-06-05 22:43:25,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4868 to 4660. [2021-06-05 22:43:25,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4660 states, 4659 states have (on average 4.260356299635115) internal successors, (19849), 4659 states have internal predecessors, (19849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4660 states to 4660 states and 19849 transitions. [2021-06-05 22:43:25,560 INFO L78 Accepts]: Start accepts. Automaton has 4660 states and 19849 transitions. Word has length 23 [2021-06-05 22:43:25,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:25,560 INFO L482 AbstractCegarLoop]: Abstraction has 4660 states and 19849 transitions. [2021-06-05 22:43:25,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:25,560 INFO L276 IsEmpty]: Start isEmpty. Operand 4660 states and 19849 transitions. [2021-06-05 22:43:25,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:25,567 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:25,567 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:25,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1426 [2021-06-05 22:43:25,767 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:25,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:25,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1931789439, now seen corresponding path program 78 times [2021-06-05 22:43:25,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:25,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609867828] [2021-06-05 22:43:25,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:25,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:25,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609867828] [2021-06-05 22:43:25,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609867828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:25,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225735783] [2021-06-05 22:43:25,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:25,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:43:25,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:25,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:43:25,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:26,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:26,040 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 22:43:26,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 52 [2021-06-05 22:43:26,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:43:26,073 INFO L628 ElimStorePlain]: treesize reduction 66, result has 17.5 percent of original size [2021-06-05 22:43:26,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:26,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:14 [2021-06-05 22:43:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:26,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225735783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:26,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:26,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:43:26,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367727716] [2021-06-05 22:43:26,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:43:26,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:26,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:43:26,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:43:26,118 INFO L87 Difference]: Start difference. First operand 4660 states and 19849 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:26,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:26,726 INFO L93 Difference]: Finished difference Result 4972 states and 21036 transitions. [2021-06-05 22:43:26,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:43:26,726 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:26,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:26,735 INFO L225 Difference]: With dead ends: 4972 [2021-06-05 22:43:26,735 INFO L226 Difference]: Without dead ends: 4963 [2021-06-05 22:43:26,735 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 415.1ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:43:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4963 states. [2021-06-05 22:43:26,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4963 to 4653. [2021-06-05 22:43:26,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 4.259458297506449) internal successors, (19815), 4652 states have internal predecessors, (19815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 19815 transitions. [2021-06-05 22:43:26,798 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 19815 transitions. Word has length 23 [2021-06-05 22:43:26,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:26,798 INFO L482 AbstractCegarLoop]: Abstraction has 4653 states and 19815 transitions. [2021-06-05 22:43:26,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:26,798 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 19815 transitions. [2021-06-05 22:43:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:26,804 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:26,804 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:27,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1428,660 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:27,005 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:27,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:27,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2116843721, now seen corresponding path program 79 times [2021-06-05 22:43:27,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:27,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590669603] [2021-06-05 22:43:27,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:27,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:27,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590669603] [2021-06-05 22:43:27,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590669603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:27,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681504267] [2021-06-05 22:43:27,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:27,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:27,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:27,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:27,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:43:27,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:27,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:27,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:27,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:43:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:27,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681504267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:27,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:27,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:43:27,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105341703] [2021-06-05 22:43:27,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:43:27,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:27,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:43:27,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:43:27,348 INFO L87 Difference]: Start difference. First operand 4653 states and 19815 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:28,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:28,037 INFO L93 Difference]: Finished difference Result 4861 states and 20578 transitions. [2021-06-05 22:43:28,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:43:28,037 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:28,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:28,046 INFO L225 Difference]: With dead ends: 4861 [2021-06-05 22:43:28,046 INFO L226 Difference]: Without dead ends: 4852 [2021-06-05 22:43:28,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 637.5ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:43:28,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4852 states. [2021-06-05 22:43:28,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4852 to 4659. [2021-06-05 22:43:28,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 4.259768140832976) internal successors, (19842), 4658 states have internal predecessors, (19842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:28,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 19842 transitions. [2021-06-05 22:43:28,108 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 19842 transitions. Word has length 23 [2021-06-05 22:43:28,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:28,108 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 19842 transitions. [2021-06-05 22:43:28,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:28,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 19842 transitions. [2021-06-05 22:43:28,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:28,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:28,114 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:28,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1432,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:28,315 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:28,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:28,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1136547507, now seen corresponding path program 80 times [2021-06-05 22:43:28,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:28,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664112031] [2021-06-05 22:43:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:28,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:28,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664112031] [2021-06-05 22:43:28,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664112031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:28,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588628170] [2021-06-05 22:43:28,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:28,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:28,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:28,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:28,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:28,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:28,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:43:28,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:28,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:28,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:28,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:43:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:28,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588628170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:28,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:28,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:43:28,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451478122] [2021-06-05 22:43:28,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:43:28,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:28,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:43:28,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:43:28,660 INFO L87 Difference]: Start difference. First operand 4659 states and 19842 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:29,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:29,559 INFO L93 Difference]: Finished difference Result 4946 states and 20918 transitions. [2021-06-05 22:43:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:43:29,559 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:29,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:29,568 INFO L225 Difference]: With dead ends: 4946 [2021-06-05 22:43:29,568 INFO L226 Difference]: Without dead ends: 4937 [2021-06-05 22:43:29,569 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 836.0ms TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:29,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2021-06-05 22:43:29,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 4655. [2021-06-05 22:43:29,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 4.259346798452944) internal successors, (19823), 4654 states have internal predecessors, (19823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:29,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 19823 transitions. [2021-06-05 22:43:29,631 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 19823 transitions. Word has length 23 [2021-06-05 22:43:29,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:29,631 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 19823 transitions. [2021-06-05 22:43:29,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:29,631 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 19823 transitions. [2021-06-05 22:43:29,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:29,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:29,638 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:29,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 662 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1434 [2021-06-05 22:43:29,838 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:29,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:29,838 INFO L82 PathProgramCache]: Analyzing trace with hash 849426155, now seen corresponding path program 81 times [2021-06-05 22:43:29,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:29,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798840731] [2021-06-05 22:43:29,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:29,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:29,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798840731] [2021-06-05 22:43:29,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798840731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:29,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490948130] [2021-06-05 22:43:29,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:29,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:43:29,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:29,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:29,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:30,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:30,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:43:30,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:30,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:30,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:30,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:43:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:30,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490948130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:30,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:30,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:43:30,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126313351] [2021-06-05 22:43:30,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:43:30,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:30,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:43:30,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:43:30,178 INFO L87 Difference]: Start difference. First operand 4655 states and 19823 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:30,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:30,831 INFO L93 Difference]: Finished difference Result 4857 states and 20563 transitions. [2021-06-05 22:43:30,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:43:30,832 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:30,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:30,840 INFO L225 Difference]: With dead ends: 4857 [2021-06-05 22:43:30,840 INFO L226 Difference]: Without dead ends: 4848 [2021-06-05 22:43:30,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 589.6ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:43:30,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4848 states. [2021-06-05 22:43:30,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4848 to 4659. [2021-06-05 22:43:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 4.259124087591241) internal successors, (19839), 4658 states have internal predecessors, (19839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:30,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 19839 transitions. [2021-06-05 22:43:30,902 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 19839 transitions. Word has length 23 [2021-06-05 22:43:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:30,902 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 19839 transitions. [2021-06-05 22:43:30,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:30,902 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 19839 transitions. [2021-06-05 22:43:30,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:30,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:30,909 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:31,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1436,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:31,109 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:31,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:31,109 INFO L82 PathProgramCache]: Analyzing trace with hash 356208769, now seen corresponding path program 82 times [2021-06-05 22:43:31,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:31,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006447122] [2021-06-05 22:43:31,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:31,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:31,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006447122] [2021-06-05 22:43:31,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006447122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:31,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770740043] [2021-06-05 22:43:31,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:31,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:43:31,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:31,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:31,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:31,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:31,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:43:31,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:31,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:31,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:31,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:43:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:31,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770740043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:31,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:31,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:43:31,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143705077] [2021-06-05 22:43:31,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:43:31,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:31,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:43:31,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:43:31,455 INFO L87 Difference]: Start difference. First operand 4659 states and 19839 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:32,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:32,395 INFO L93 Difference]: Finished difference Result 4831 states and 20469 transitions. [2021-06-05 22:43:32,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:43:32,395 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:32,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:32,404 INFO L225 Difference]: With dead ends: 4831 [2021-06-05 22:43:32,404 INFO L226 Difference]: Without dead ends: 4820 [2021-06-05 22:43:32,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 811.7ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:43:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4820 states. [2021-06-05 22:43:32,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4820 to 4655. [2021-06-05 22:43:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 4.259346798452944) internal successors, (19823), 4654 states have internal predecessors, (19823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 19823 transitions. [2021-06-05 22:43:32,466 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 19823 transitions. Word has length 23 [2021-06-05 22:43:32,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:32,466 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 19823 transitions. [2021-06-05 22:43:32,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:32,466 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 19823 transitions. [2021-06-05 22:43:32,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:32,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:32,473 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:32,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1438 [2021-06-05 22:43:32,674 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:32,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:32,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1290985025, now seen corresponding path program 83 times [2021-06-05 22:43:32,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:32,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578165420] [2021-06-05 22:43:32,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:32,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:32,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578165420] [2021-06-05 22:43:32,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578165420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:32,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375986304] [2021-06-05 22:43:32,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:32,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:43:32,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:32,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:32,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:32,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:32,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:43:32,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:32,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:32,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:32,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 22:43:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:33,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375986304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:33,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:33,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:43:33,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836878023] [2021-06-05 22:43:33,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:43:33,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:33,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:43:33,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:43:33,028 INFO L87 Difference]: Start difference. First operand 4655 states and 19823 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:33,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:33,852 INFO L93 Difference]: Finished difference Result 4941 states and 20899 transitions. [2021-06-05 22:43:33,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:43:33,852 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:33,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:33,861 INFO L225 Difference]: With dead ends: 4941 [2021-06-05 22:43:33,861 INFO L226 Difference]: Without dead ends: 4932 [2021-06-05 22:43:33,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 809.9ms TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:43:33,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4932 states. [2021-06-05 22:43:33,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 4659. [2021-06-05 22:43:33,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 4.259124087591241) internal successors, (19839), 4658 states have internal predecessors, (19839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 19839 transitions. [2021-06-05 22:43:33,925 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 19839 transitions. Word has length 23 [2021-06-05 22:43:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:33,925 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 19839 transitions. [2021-06-05 22:43:33,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:33,925 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 19839 transitions. [2021-06-05 22:43:33,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:33,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:33,932 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:34,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 665 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1440 [2021-06-05 22:43:34,132 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:34,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:34,132 INFO L82 PathProgramCache]: Analyzing trace with hash 278292493, now seen corresponding path program 84 times [2021-06-05 22:43:34,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:34,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387718089] [2021-06-05 22:43:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:34,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:34,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387718089] [2021-06-05 22:43:34,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387718089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:34,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102177308] [2021-06-05 22:43:34,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:34,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:43:34,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:34,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:43:34,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:34,391 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 22:43:34,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 22:43:34,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:34,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:34,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:34,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:41 [2021-06-05 22:43:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:34,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102177308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:34,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:34,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:43:34,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102859525] [2021-06-05 22:43:34,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:43:34,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:34,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:43:34,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:43:34,518 INFO L87 Difference]: Start difference. First operand 4659 states and 19839 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:35,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:35,083 INFO L93 Difference]: Finished difference Result 4860 states and 20577 transitions. [2021-06-05 22:43:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:43:35,083 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:35,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:35,091 INFO L225 Difference]: With dead ends: 4860 [2021-06-05 22:43:35,092 INFO L226 Difference]: Without dead ends: 4849 [2021-06-05 22:43:35,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 554.7ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:43:35,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4849 states. [2021-06-05 22:43:35,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4849 to 4653. [2021-06-05 22:43:35,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 4.259458297506449) internal successors, (19815), 4652 states have internal predecessors, (19815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:35,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 19815 transitions. [2021-06-05 22:43:35,152 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 19815 transitions. Word has length 23 [2021-06-05 22:43:35,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:35,152 INFO L482 AbstractCegarLoop]: Abstraction has 4653 states and 19815 transitions. [2021-06-05 22:43:35,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:35,152 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 19815 transitions. [2021-06-05 22:43:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:35,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:35,159 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:35,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1442 [2021-06-05 22:43:35,359 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:35,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:35,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1439193677, now seen corresponding path program 85 times [2021-06-05 22:43:35,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:35,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405825890] [2021-06-05 22:43:35,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:35,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:35,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405825890] [2021-06-05 22:43:35,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405825890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:35,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349031873] [2021-06-05 22:43:35,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:35,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:35,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:35,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:35,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:43:35,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:35,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:35,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:35,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:43:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:35,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349031873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:35,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:35,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:43:35,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108114688] [2021-06-05 22:43:35,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:43:35,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:35,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:43:35,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:43:35,677 INFO L87 Difference]: Start difference. First operand 4653 states and 19815 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:36,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:36,364 INFO L93 Difference]: Finished difference Result 5078 states and 21431 transitions. [2021-06-05 22:43:36,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:43:36,364 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:36,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:36,373 INFO L225 Difference]: With dead ends: 5078 [2021-06-05 22:43:36,373 INFO L226 Difference]: Without dead ends: 5069 [2021-06-05 22:43:36,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 587.0ms TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:36,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5069 states. [2021-06-05 22:43:36,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5069 to 4653. [2021-06-05 22:43:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 4.257738607050731) internal successors, (19807), 4652 states have internal predecessors, (19807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 19807 transitions. [2021-06-05 22:43:36,435 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 19807 transitions. Word has length 23 [2021-06-05 22:43:36,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:36,435 INFO L482 AbstractCegarLoop]: Abstraction has 4653 states and 19807 transitions. [2021-06-05 22:43:36,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:36,435 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 19807 transitions. [2021-06-05 22:43:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:36,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:36,441 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:36,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1446,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:36,642 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:36,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:36,642 INFO L82 PathProgramCache]: Analyzing trace with hash -398957879, now seen corresponding path program 86 times [2021-06-05 22:43:36,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:36,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423904613] [2021-06-05 22:43:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:36,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:36,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423904613] [2021-06-05 22:43:36,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423904613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:36,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823346154] [2021-06-05 22:43:36,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:36,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:36,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:36,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:36,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:36,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:36,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:43:36,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:36,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:36,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:36,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:43:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:36,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823346154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:36,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:36,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:43:36,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798947202] [2021-06-05 22:43:36,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:43:36,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:36,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:43:36,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:43:36,976 INFO L87 Difference]: Start difference. First operand 4653 states and 19807 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:37,872 INFO L93 Difference]: Finished difference Result 5043 states and 21289 transitions. [2021-06-05 22:43:37,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:43:37,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:37,882 INFO L225 Difference]: With dead ends: 5043 [2021-06-05 22:43:37,882 INFO L226 Difference]: Without dead ends: 5034 [2021-06-05 22:43:37,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 817.9ms TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:43:37,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5034 states. [2021-06-05 22:43:37,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5034 to 4657. [2021-06-05 22:43:37,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 4.257517182130584) internal successors, (19823), 4656 states have internal predecessors, (19823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:37,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 19823 transitions. [2021-06-05 22:43:37,948 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 19823 transitions. Word has length 23 [2021-06-05 22:43:37,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:37,949 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 19823 transitions. [2021-06-05 22:43:37,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 19823 transitions. [2021-06-05 22:43:37,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:37,955 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:37,955 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:38,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1448,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:38,156 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:38,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:38,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1411650411, now seen corresponding path program 87 times [2021-06-05 22:43:38,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:38,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719429743] [2021-06-05 22:43:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:38,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:38,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719429743] [2021-06-05 22:43:38,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719429743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:38,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943058606] [2021-06-05 22:43:38,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:38,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:43:38,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:38,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:38,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:38,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:38,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:43:38,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:38,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:38,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:38,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 22:43:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:38,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943058606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:38,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:38,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:43:38,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200831569] [2021-06-05 22:43:38,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:43:38,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:38,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:43:38,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:43:38,518 INFO L87 Difference]: Start difference. First operand 4657 states and 19823 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:39,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:39,520 INFO L93 Difference]: Finished difference Result 4924 states and 20819 transitions. [2021-06-05 22:43:39,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:43:39,521 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:43:39,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:39,529 INFO L225 Difference]: With dead ends: 4924 [2021-06-05 22:43:39,529 INFO L226 Difference]: Without dead ends: 4913 [2021-06-05 22:43:39,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 907.4ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:43:39,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4913 states. [2021-06-05 22:43:39,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4913 to 4651. [2021-06-05 22:43:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 4.258279569892473) internal successors, (19801), 4650 states have internal predecessors, (19801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:39,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 19801 transitions. [2021-06-05 22:43:39,593 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 19801 transitions. Word has length 23 [2021-06-05 22:43:39,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:39,593 INFO L482 AbstractCegarLoop]: Abstraction has 4651 states and 19801 transitions. [2021-06-05 22:43:39,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:39,593 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 19801 transitions. [2021-06-05 22:43:39,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:43:39,599 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:39,599 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:39,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1450,669 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:39,800 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:39,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:39,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2077782683, now seen corresponding path program 7 times [2021-06-05 22:43:39,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:39,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50621152] [2021-06-05 22:43:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:39,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:39,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50621152] [2021-06-05 22:43:39,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50621152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:39,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31043797] [2021-06-05 22:43:39,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:39,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:43:39,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:40,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:40,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 22:43:40,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:40,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:40,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:40,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 22:43:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:40,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31043797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:40,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:40,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:43:40,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36033224] [2021-06-05 22:43:40,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:43:40,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:40,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:43:40,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:43:40,110 INFO L87 Difference]: Start difference. First operand 4651 states and 19801 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 22:43:40,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:43:40,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 670 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1452 [2021-06-05 22:43:40,405 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 22:43:40,407 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 22:43:40,408 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 22:43:40,408 INFO L202 PluginConnector]: Adding new model parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 10:43:40 BasicIcfg [2021-06-05 22:43:40,408 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 22:43:40,409 INFO L168 Benchmark]: Toolchain (without parser) took 857254.28 ms. Allocated memory was 341.8 MB in the beginning and 1.3 GB in the end (delta: 926.9 MB). Free memory was 320.9 MB in the beginning and 750.6 MB in the end (delta: -429.7 MB). Peak memory consumption was 498.4 MB. Max. memory is 16.0 GB. [2021-06-05 22:43:40,409 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 341.8 MB. Free memory was 322.1 MB in the beginning and 322.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:43:40,409 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.86 ms. Allocated memory is still 341.8 MB. Free memory was 320.8 MB in the beginning and 319.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:43:40,409 INFO L168 Benchmark]: Boogie Preprocessor took 14.86 ms. Allocated memory is still 341.8 MB. Free memory was 319.3 MB in the beginning and 318.3 MB in the end (delta: 989.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 22:43:40,409 INFO L168 Benchmark]: RCFGBuilder took 232.05 ms. Allocated memory is still 341.8 MB. Free memory was 318.3 MB in the beginning and 303.0 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 22:43:40,409 INFO L168 Benchmark]: TraceAbstraction took 856986.11 ms. Allocated memory was 341.8 MB in the beginning and 1.3 GB in the end (delta: 926.9 MB). Free memory was 302.5 MB in the beginning and 750.6 MB in the end (delta: -448.1 MB). Peak memory consumption was 481.6 MB. Max. memory is 16.0 GB. [2021-06-05 22:43:40,409 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 341.8 MB. Free memory was 322.1 MB in the beginning and 322.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.86 ms. Allocated memory is still 341.8 MB. Free memory was 320.8 MB in the beginning and 319.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.86 ms. Allocated memory is still 341.8 MB. Free memory was 319.3 MB in the beginning and 318.3 MB in the end (delta: 989.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 232.05 ms. Allocated memory is still 341.8 MB. Free memory was 318.3 MB in the beginning and 303.0 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 856986.11 ms. Allocated memory was 341.8 MB in the beginning and 1.3 GB in the end (delta: 926.9 MB). Free memory was 302.5 MB in the beginning and 750.6 MB in the end (delta: -448.1 MB). Peak memory consumption was 481.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (4651states) and FLOYD_HOARE automaton (currently 5 states, 19 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 21 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 42 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 856896.6ms, OverallIterations: 670, TraceHistogramMax: 3, EmptinessCheckTime: 3446.4ms, AutomataDifference: 469685.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 34.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 41878 SDtfs, 118073 SDslu, 407024 SDs, 0 SdLazy, 451209 SolverSat, 37133 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 164221.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28910 GetRequests, 9392 SyntacticMatches, 547 SemanticMatches, 18970 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116729 ImplicationChecksByTransitivity, 385181.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4684occurred in iteration=614, InterpolantAutomatonStates: 16433, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 34432.2ms AutomataMinimizationTime, 669 MinimizatonAttempts, 293727 StatesRemovedByMinimization, 669 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2425.1ms SsaConstructionTime, 6089.3ms SatisfiabilityAnalysisTime, 193688.1ms InterpolantComputationTime, 30561 NumberOfCodeBlocks, 30561 NumberOfCodeBlocksAsserted, 2196 NumberOfCheckSat, 29222 ConstructedInterpolants, 33 QuantifiedInterpolants, 554649 SizeOfPredicates, 4538 NumberOfNonLiveVariables, 58473 ConjunctsInSsa, 20546 ConjunctsInUnsatCore, 1339 InterpolantComputations, 4 PerfectInterpolantSequences, 42/7970 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown