/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/popl20-more/min-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-06 00:07:16,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-06 00:07:16,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-06 00:07:16,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-06 00:07:16,461 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 [2021-06-06 00:07:16,498 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-06 00:07:16,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-06 00:07:16,498 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-06 00:07:16,499 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-06 00:07:16,500 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-06 00:07:16,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-06 00:07:16,500 INFO L138 SettingsManager]: * Use SBE=true [2021-06-06 00:07:16,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-06 00:07:16,500 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-06 00:07:16,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-06 00:07:16,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-06 00:07:16,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-06 00:07:16,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-06 00:07:16,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-06 00:07:16,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-06 00:07:16,501 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-06 00:07:16,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-06 00:07:16,501 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-06 00:07:16,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-06 00:07:16,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-06 00:07:16,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-06 00:07:16,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-06 00:07:16,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-06 00:07:16,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 00:07:16,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-06 00:07:16,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-06 00:07:16,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-06 00:07:16,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-06 00:07:16,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-06 00:07:16,503 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-06 00:07:16,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-06 00:07:16,503 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-06 00:07:16,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-06 00:07:16,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-06 00:07:16,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-06 00:07:16,820 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-06 00:07:16,821 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-06 00:07:16,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array.wvr.bpl [2021-06-06 00:07:16,822 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array.wvr.bpl' [2021-06-06 00:07:16,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-06 00:07:16,879 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-06 00:07:16,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-06 00:07:16,880 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-06 00:07:16,880 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-06 00:07:16,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:07:16" (1/1) ... [2021-06-06 00:07:16,895 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:07:16" (1/1) ... [2021-06-06 00:07:16,902 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-06 00:07:16,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-06 00:07:16,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-06 00:07:16,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-06 00:07:16,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:07:16" (1/1) ... [2021-06-06 00:07:16,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:07:16" (1/1) ... [2021-06-06 00:07:16,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:07:16" (1/1) ... [2021-06-06 00:07:16,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:07:16" (1/1) ... [2021-06-06 00:07:16,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:07:16" (1/1) ... [2021-06-06 00:07:16,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:07:16" (1/1) ... [2021-06-06 00:07:16,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:07:16" (1/1) ... [2021-06-06 00:07:16,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-06 00:07:16,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-06 00:07:16,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-06 00:07:16,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-06 00:07:16,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:07:16" (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 [2021-06-06 00:07:16,971 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-06 00:07:16,971 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-06 00:07:16,972 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-06 00:07:16,972 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-06 00:07:16,972 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-06 00:07:16,972 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-06 00:07:16,972 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-06 00:07:16,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-06 00:07:16,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-06 00:07:16,973 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-06 00:07:16,973 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-06 00:07:16,973 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-06 00:07:16,974 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-06 00:07:17,233 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-06 00:07:17,233 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-06 00:07:17,234 INFO L202 PluginConnector]: Adding new model min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:07:17 BoogieIcfgContainer [2021-06-06 00:07:17,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-06 00:07:17,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-06 00:07:17,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-06 00:07:17,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-06 00:07:17,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:07:16" (1/2) ... [2021-06-06 00:07:17,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44db8e5b and model type min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.06 12:07:17, skipping insertion in model container [2021-06-06 00:07:17,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:07:17" (2/2) ... [2021-06-06 00:07:17,241 INFO L111 eAbstractionObserver]: Analyzing ICFG min-array.wvr.bpl [2021-06-06 00:07:17,258 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-06 00:07:17,258 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-06 00:07:17,258 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-06 00:07:17,259 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-06 00:07:17,292 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-06 00:07:17,309 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-06 00:07:17,339 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-06 00:07:17,339 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-06 00:07:17,339 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-06 00:07:17,339 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-06 00:07:17,339 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-06 00:07:17,339 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-06 00:07:17,339 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-06 00:07:17,340 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-06 00:07:17,347 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-06 00:07:17,399 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:17,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:17,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-06 00:07:17,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:17,410 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:17,410 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:17,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:17,425 INFO L82 PathProgramCache]: Analyzing trace with hash -520695315, now seen corresponding path program 1 times [2021-06-06 00:07:17,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:17,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034869594] [2021-06-06 00:07:17,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:17,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:17,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034869594] [2021-06-06 00:07:17,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034869594] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:07:17,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:07:17,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-06 00:07:17,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684237221] [2021-06-06 00:07:17,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-06 00:07:17,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:17,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-06 00:07:17,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:07:17,619 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 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 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:17,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:17,662 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-06-06 00:07:17,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 00:07:17,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-06 00:07:17,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:17,681 INFO L225 Difference]: With dead ends: 217 [2021-06-06 00:07:17,681 INFO L226 Difference]: Without dead ends: 202 [2021-06-06 00:07:17,683 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:07:17,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-06 00:07:17,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-06 00:07:17,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-06-06 00:07:17,730 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-06-06 00:07:17,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:17,731 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-06-06 00:07:17,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-06-06 00:07:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-06 00:07:17,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:17,733 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] [2021-06-06 00:07:17,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-06 00:07:17,734 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:17,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:17,734 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-06-06 00:07:17,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:17,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641992904] [2021-06-06 00:07:17,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:07:17,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:17,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641992904] [2021-06-06 00:07:17,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641992904] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:07:17,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:07:17,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:07:17,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564217197] [2021-06-06 00:07:17,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-06 00:07:17,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:17,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-06 00:07:17,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-06 00:07:17,781 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:17,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:17,818 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-06-06 00:07:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-06 00:07:17,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-06 00:07:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:17,821 INFO L225 Difference]: With dead ends: 158 [2021-06-06 00:07:17,821 INFO L226 Difference]: Without dead ends: 158 [2021-06-06 00:07:17,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:07:17,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-06 00:07:17,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-06-06 00:07:17,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-06 00:07:17,836 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-06-06 00:07:17,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:17,836 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-06 00:07:17,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-06 00:07:17,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-06 00:07:17,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:17,838 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:17,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-06 00:07:17,838 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:17,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:17,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1197401099, now seen corresponding path program 1 times [2021-06-06 00:07:17,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:17,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324914194] [2021-06-06 00:07:17,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:07:17,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:17,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324914194] [2021-06-06 00:07:17,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324914194] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:07:17,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:07:17,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-06 00:07:17,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446242334] [2021-06-06 00:07:17,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:07:17,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:17,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:07:17,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:07:17,899 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:17,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:17,959 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-06-06 00:07:17,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:07:17,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-06 00:07:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:17,965 INFO L225 Difference]: With dead ends: 183 [2021-06-06 00:07:17,965 INFO L226 Difference]: Without dead ends: 183 [2021-06-06 00:07:17,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:07:17,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-06 00:07:17,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-06 00:07:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-06 00:07:17,988 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-06 00:07:17,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:17,989 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-06 00:07:17,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:17,989 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-06 00:07:17,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:07:17,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:17,995 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] [2021-06-06 00:07:17,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-06 00:07:17,996 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:17,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-06-06 00:07:17,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:17,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296397148] [2021-06-06 00:07:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:18,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:18,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296397148] [2021-06-06 00:07:18,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296397148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:18,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573254555] [2021-06-06 00:07:18,340 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 [2021-06-06 00:07:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:18,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-06 00:07:18,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:18,833 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 16 treesize of output 10 [2021-06-06 00:07:18,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:18,848 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 18 treesize of output 12 [2021-06-06 00:07:18,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:18,867 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 23 treesize of output 15 [2021-06-06 00:07:18,876 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:18,879 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-06 00:07:18,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:18,885 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 23 treesize of output 15 [2021-06-06 00:07:18,889 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:18,891 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 16 treesize of output 10 [2021-06-06 00:07:18,894 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:18,917 INFO L628 ElimStorePlain]: treesize reduction 18, result has 58.1 percent of original size [2021-06-06 00:07:18,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:07:18,929 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:178, output treesize:17 [2021-06-06 00:07:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:18,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573254555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:18,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:18,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:07:18,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442329785] [2021-06-06 00:07:18,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:07:18,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:18,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:07:18,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:07:18,966 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:19,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:19,187 INFO L93 Difference]: Finished difference Result 298 states and 839 transitions. [2021-06-06 00:07:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:07:19,188 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-06 00:07:19,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:19,192 INFO L225 Difference]: With dead ends: 298 [2021-06-06 00:07:19,192 INFO L226 Difference]: Without dead ends: 283 [2021-06-06 00:07:19,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 389.0ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:07:19,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-06 00:07:19,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 224. [2021-06-06 00:07:19,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:19,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-06 00:07:19,221 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-06 00:07:19,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:19,221 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-06 00:07:19,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:19,221 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-06 00:07:19,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:07:19,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:19,222 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] [2021-06-06 00:07:19,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:19,423 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:19,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:19,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-06-06 00:07:19,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:19,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714690620] [2021-06-06 00:07:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:19,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:19,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714690620] [2021-06-06 00:07:19,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714690620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:19,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174628451] [2021-06-06 00:07:19,684 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 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 [2021-06-06 00:07:19,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:07:19,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:19,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-06 00:07:19,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:20,077 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:07:20,077 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 16 treesize of output 14 [2021-06-06 00:07:20,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:20,097 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:07:20,097 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 16 treesize of output 14 [2021-06-06 00:07:20,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:20,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:20,112 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 [2021-06-06 00:07:20,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:20,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:20,133 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 21 treesize of output 21 [2021-06-06 00:07:20,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:20,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:20,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:07:20,207 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:124, output treesize:116 [2021-06-06 00:07:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:20,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174628451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:20,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:20,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-06 00:07:20,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645778867] [2021-06-06 00:07:20,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:07:20,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:20,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:07:20,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:07:20,381 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-06-06 00:07:20,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:20,987 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-06 00:07:20,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:07:20,991 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 22 [2021-06-06 00:07:20,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:20,993 INFO L225 Difference]: With dead ends: 374 [2021-06-06 00:07:20,993 INFO L226 Difference]: Without dead ends: 359 [2021-06-06 00:07:20,994 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 748.1ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:07:20,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-06 00:07:21,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-06 00:07:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:21,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-06 00:07:21,005 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-06 00:07:21,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:21,005 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-06 00:07:21,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-06-06 00:07:21,006 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-06 00:07:21,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:07:21,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:21,007 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] [2021-06-06 00:07:21,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-06 00:07:21,230 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:21,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:21,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-06-06 00:07:21,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:21,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057543048] [2021-06-06 00:07:21,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:21,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:21,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057543048] [2021-06-06 00:07:21,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057543048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:21,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618086825] [2021-06-06 00:07:21,399 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 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 [2021-06-06 00:07:21,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:07:21,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:21,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:07:21,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:21,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-06 00:07:21,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:21,572 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 16 treesize of output 10 [2021-06-06 00:07:21,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:21,576 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 23 treesize of output 15 [2021-06-06 00:07:21,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:21,581 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 16 treesize of output 10 [2021-06-06 00:07:21,582 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:21,586 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 18 treesize of output 12 [2021-06-06 00:07:21,587 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:21,589 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 23 treesize of output 15 [2021-06-06 00:07:21,591 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:21,610 INFO L628 ElimStorePlain]: treesize reduction 10, result has 63.0 percent of original size [2021-06-06 00:07:21,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:07:21,611 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:130, output treesize:17 [2021-06-06 00:07:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:21,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618086825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:21,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:21,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:07:21,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989505265] [2021-06-06 00:07:21,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:07:21,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:21,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:07:21,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:07:21,648 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:21,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:21,847 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-06-06 00:07:21,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:07:21,848 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-06 00:07:21,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:21,850 INFO L225 Difference]: With dead ends: 363 [2021-06-06 00:07:21,850 INFO L226 Difference]: Without dead ends: 348 [2021-06-06 00:07:21,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 273.9ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:07:21,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-06 00:07:21,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-06-06 00:07:21,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:21,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-06 00:07:21,863 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-06 00:07:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:21,863 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-06 00:07:21,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-06 00:07:21,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:07:21,864 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:21,864 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] [2021-06-06 00:07:22,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:22,081 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:22,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:22,081 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-06-06 00:07:22,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:22,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492644336] [2021-06-06 00:07:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:22,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:22,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492644336] [2021-06-06 00:07:22,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492644336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:22,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153757697] [2021-06-06 00:07:22,214 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 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 [2021-06-06 00:07:22,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:07:22,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:22,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-06 00:07:22,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:22,416 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:07:22,417 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 16 treesize of output 14 [2021-06-06 00:07:22,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:22,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:22,429 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 [2021-06-06 00:07:22,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:22,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:22,496 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:07:22,496 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 16 treesize of output 14 [2021-06-06 00:07:22,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:22,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:22,506 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 21 treesize of output 21 [2021-06-06 00:07:22,507 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:22,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:22,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:07:22,562 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:121, output treesize:71 [2021-06-06 00:07:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:22,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153757697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:22,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:22,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:07:22,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447891247] [2021-06-06 00:07:22,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:07:22,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:22,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:07:22,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:07:22,691 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:23,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:23,020 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-06 00:07:23,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:07:23,020 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-06 00:07:23,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:23,022 INFO L225 Difference]: With dead ends: 425 [2021-06-06 00:07:23,022 INFO L226 Difference]: Without dead ends: 410 [2021-06-06 00:07:23,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 401.0ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:07:23,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-06 00:07:23,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-06 00:07:23,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:23,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-06 00:07:23,031 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-06 00:07:23,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:23,031 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-06 00:07:23,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:23,031 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-06 00:07:23,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:23,032 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:23,032 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:23,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:23,246 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:23,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:23,246 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-06-06 00:07:23,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:23,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560212066] [2021-06-06 00:07:23,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:23,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:23,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560212066] [2021-06-06 00:07:23,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560212066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:23,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085433133] [2021-06-06 00:07:23,310 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 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 [2021-06-06 00:07:23,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:07:23,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:23,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:23,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:23,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085433133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:23,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:23,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:07:23,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279818285] [2021-06-06 00:07:23,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:07:23,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:23,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:07:23,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:07:23,448 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:07:23,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:23,875 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-06 00:07:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:07:23,875 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 24 [2021-06-06 00:07:23,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:23,878 INFO L225 Difference]: With dead ends: 619 [2021-06-06 00:07:23,878 INFO L226 Difference]: Without dead ends: 619 [2021-06-06 00:07:23,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 256.6ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:07:23,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-06 00:07:23,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-06 00:07:23,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-06 00:07:23,890 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-06 00:07:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:23,890 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-06 00:07:23,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:07:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-06 00:07:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:23,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:23,891 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:24,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-06 00:07:24,114 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:24,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:24,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-06-06 00:07:24,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:24,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234417777] [2021-06-06 00:07:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:24,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:24,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234417777] [2021-06-06 00:07:24,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234417777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:24,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433758184] [2021-06-06 00:07:24,173 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 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 [2021-06-06 00:07:24,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:07:24,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:24,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:24,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:24,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433758184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:24,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:24,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:07:24,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453727605] [2021-06-06 00:07:24,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:07:24,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:24,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:07:24,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:07:24,295 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:25,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:25,222 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-06 00:07:25,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:07:25,223 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:25,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:25,227 INFO L225 Difference]: With dead ends: 1078 [2021-06-06 00:07:25,228 INFO L226 Difference]: Without dead ends: 1078 [2021-06-06 00:07:25,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 552.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:07:25,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-06 00:07:25,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-06 00:07:25,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:25,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-06 00:07:25,247 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-06 00:07:25,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:25,247 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-06 00:07:25,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:25,248 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-06 00:07:25,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:25,249 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:25,249 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:25,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:25,473 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:25,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:25,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-06-06 00:07:25,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:25,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736291719] [2021-06-06 00:07:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:25,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:25,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736291719] [2021-06-06 00:07:25,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736291719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:25,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625870150] [2021-06-06 00:07:25,524 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 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 [2021-06-06 00:07:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:25,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:25,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:25,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625870150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:25,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:25,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:07:25,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942363451] [2021-06-06 00:07:25,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:07:25,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:25,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:07:25,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:07:25,642 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:26,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:26,320 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-06 00:07:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:07:26,321 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:26,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:26,325 INFO L225 Difference]: With dead ends: 951 [2021-06-06 00:07:26,326 INFO L226 Difference]: Without dead ends: 951 [2021-06-06 00:07:26,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 425.6ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:07:26,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-06 00:07:26,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-06 00:07:26,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:26,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-06 00:07:26,339 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-06 00:07:26,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:26,339 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-06 00:07:26,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:26,340 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-06 00:07:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:26,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:26,340 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, 1] [2021-06-06 00:07:26,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:26,553 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:26,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:26,553 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-06-06 00:07:26,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:26,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442406539] [2021-06-06 00:07:26,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:07:26,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:26,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442406539] [2021-06-06 00:07:26,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442406539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:26,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064590128] [2021-06-06 00:07:26,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-06 00:07:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:26,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:07:26,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:07:26,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064590128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:26,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:26,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-06 00:07:26,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721585287] [2021-06-06 00:07:26,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:07:26,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:26,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:07:26,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:07:26,675 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-06-06 00:07:26,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:26,795 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-06 00:07:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:07:26,795 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-06-06 00:07:26,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:26,799 INFO L225 Difference]: With dead ends: 669 [2021-06-06 00:07:26,799 INFO L226 Difference]: Without dead ends: 663 [2021-06-06 00:07:26,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:07:26,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-06 00:07:26,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-06 00:07:26,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:26,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-06 00:07:26,811 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-06 00:07:26,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:26,811 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-06 00:07:26,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-06-06 00:07:26,812 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-06 00:07:26,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:26,813 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:26,813 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:27,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-06 00:07:27,034 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:27,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:27,035 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-06-06 00:07:27,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:27,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025551863] [2021-06-06 00:07:27,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:27,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:27,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025551863] [2021-06-06 00:07:27,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025551863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:27,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796106219] [2021-06-06 00:07:27,096 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 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 [2021-06-06 00:07:27,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:07:27,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:27,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:27,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:27,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796106219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:27,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:27,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-06 00:07:27,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381308931] [2021-06-06 00:07:27,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:07:27,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:27,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:07:27,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:07:27,216 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:27,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:27,392 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-06 00:07:27,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:07:27,392 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:27,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:27,396 INFO L225 Difference]: With dead ends: 710 [2021-06-06 00:07:27,396 INFO L226 Difference]: Without dead ends: 672 [2021-06-06 00:07:27,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:07:27,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-06 00:07:27,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-06 00:07:27,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-06 00:07:27,410 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-06 00:07:27,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:27,410 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-06 00:07:27,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:27,410 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-06 00:07:27,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:27,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:27,412 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, 1] [2021-06-06 00:07:27,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:27,625 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:27,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:27,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-06-06 00:07:27,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:27,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836664987] [2021-06-06 00:07:27,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:07:27,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:27,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836664987] [2021-06-06 00:07:27,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836664987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:27,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120004826] [2021-06-06 00:07:27,662 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 [2021-06-06 00:07:27,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:07:27,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:27,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:07:27,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:07:27,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120004826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:27,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:27,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-06 00:07:27,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090918248] [2021-06-06 00:07:27,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:07:27,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:27,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:07:27,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:07:27,737 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-06-06 00:07:27,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:27,836 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-06 00:07:27,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:07:27,836 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-06-06 00:07:27,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:27,839 INFO L225 Difference]: With dead ends: 830 [2021-06-06 00:07:27,839 INFO L226 Difference]: Without dead ends: 830 [2021-06-06 00:07:27,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:07:27,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-06 00:07:27,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-06 00:07:27,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:27,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-06 00:07:27,855 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-06 00:07:27,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:27,855 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-06 00:07:27,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-06-06 00:07:27,855 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-06 00:07:27,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:27,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:27,856 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:28,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:28,071 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:28,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:28,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-06-06 00:07:28,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:28,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171952449] [2021-06-06 00:07:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:28,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:28,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171952449] [2021-06-06 00:07:28,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171952449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:28,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85670764] [2021-06-06 00:07:28,156 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 [2021-06-06 00:07:28,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:07:28,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:28,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:28,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:28,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85670764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:28,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:28,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:07:28,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673975063] [2021-06-06 00:07:28,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:07:28,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:28,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:07:28,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:07:28,279 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-06-06 00:07:28,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:28,575 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-06 00:07:28,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:07:28,576 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-06-06 00:07:28,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:28,581 INFO L225 Difference]: With dead ends: 1196 [2021-06-06 00:07:28,581 INFO L226 Difference]: Without dead ends: 1196 [2021-06-06 00:07:28,581 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:07:28,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-06 00:07:28,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-06 00:07:28,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:28,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-06 00:07:28,599 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-06 00:07:28,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:28,599 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-06 00:07:28,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-06-06 00:07:28,599 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-06 00:07:28,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:28,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:28,601 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:28,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-06 00:07:28,823 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:28,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:28,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-06-06 00:07:28,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:28,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569088194] [2021-06-06 00:07:28,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:28,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:28,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569088194] [2021-06-06 00:07:28,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569088194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:28,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832723080] [2021-06-06 00:07:28,877 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) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:28,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:07:28,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:28,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:28,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:28,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832723080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:28,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:28,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:07:28,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414508024] [2021-06-06 00:07:28,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:07:28,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:28,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:07:28,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:07:28,997 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-06-06 00:07:29,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:29,432 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-06 00:07:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:07:29,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-06-06 00:07:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:29,439 INFO L225 Difference]: With dead ends: 1492 [2021-06-06 00:07:29,439 INFO L226 Difference]: Without dead ends: 1492 [2021-06-06 00:07:29,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:07:29,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-06 00:07:29,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-06 00:07:29,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:29,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-06 00:07:29,461 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-06 00:07:29,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:29,461 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-06 00:07:29,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-06-06 00:07:29,461 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-06 00:07:29,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:29,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:29,462 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:29,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-06 00:07:29,677 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:29,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:29,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-06-06 00:07:29,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:29,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229830372] [2021-06-06 00:07:29,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:29,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:29,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229830372] [2021-06-06 00:07:29,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229830372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:29,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626481645] [2021-06-06 00:07:29,719 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 [2021-06-06 00:07:29,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:07:29,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:29,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:29,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:29,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626481645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:29,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:29,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-06 00:07:29,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142038238] [2021-06-06 00:07:29,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:07:29,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:29,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:07:29,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:07:29,841 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:30,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:30,077 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-06 00:07:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:07:30,077 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:30,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:30,083 INFO L225 Difference]: With dead ends: 1258 [2021-06-06 00:07:30,083 INFO L226 Difference]: Without dead ends: 1248 [2021-06-06 00:07:30,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:07:30,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-06 00:07:30,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-06 00:07:30,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:30,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-06 00:07:30,104 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-06 00:07:30,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:30,105 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-06 00:07:30,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:30,105 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-06 00:07:30,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:30,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:30,107 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, 1] [2021-06-06 00:07:30,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-06 00:07:30,329 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:30,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:30,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-06-06 00:07:30,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:30,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378663896] [2021-06-06 00:07:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:30,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:30,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378663896] [2021-06-06 00:07:30,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378663896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:30,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706560837] [2021-06-06 00:07:30,372 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 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 [2021-06-06 00:07:30,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:07:30,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:30,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:30,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:30,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706560837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:30,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:30,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-06 00:07:30,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034246481] [2021-06-06 00:07:30,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:07:30,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:30,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:07:30,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:07:30,485 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-06-06 00:07:30,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:30,744 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-06 00:07:30,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:07:30,744 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 24 [2021-06-06 00:07:30,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:30,748 INFO L225 Difference]: With dead ends: 1329 [2021-06-06 00:07:30,748 INFO L226 Difference]: Without dead ends: 1329 [2021-06-06 00:07:30,749 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:07:30,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-06 00:07:30,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-06 00:07:30,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-06 00:07:30,768 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-06 00:07:30,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:30,768 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-06 00:07:30,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-06-06 00:07:30,768 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-06 00:07:30,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:30,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:30,770 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, 1] [2021-06-06 00:07:30,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:30,981 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:30,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:30,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-06-06 00:07:30,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:30,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425636056] [2021-06-06 00:07:30,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:31,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:31,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425636056] [2021-06-06 00:07:31,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425636056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:31,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626347805] [2021-06-06 00:07:31,026 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 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 [2021-06-06 00:07:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:31,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:31,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:31,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626347805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:31,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:31,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:07:31,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4973912] [2021-06-06 00:07:31,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:07:31,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:31,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:07:31,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:07:31,129 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-06-06 00:07:31,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:31,457 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-06 00:07:31,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:07:31,457 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-06-06 00:07:31,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:31,464 INFO L225 Difference]: With dead ends: 1548 [2021-06-06 00:07:31,464 INFO L226 Difference]: Without dead ends: 1544 [2021-06-06 00:07:31,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:07:31,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-06 00:07:31,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-06 00:07:31,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:31,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-06 00:07:31,486 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-06 00:07:31,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:31,486 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-06 00:07:31,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-06-06 00:07:31,486 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-06 00:07:31,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:31,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:31,488 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, 1] [2021-06-06 00:07:31,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:31,710 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:31,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:31,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-06-06 00:07:31,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:31,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245866956] [2021-06-06 00:07:31,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:31,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:31,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245866956] [2021-06-06 00:07:31,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245866956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:31,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582684307] [2021-06-06 00:07:31,756 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 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 [2021-06-06 00:07:31,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:07:31,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:31,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:31,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:31,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582684307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:31,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:31,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:07:31,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897499031] [2021-06-06 00:07:31,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:07:31,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:31,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:07:31,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:07:31,870 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:32,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:32,687 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-06 00:07:32,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:07:32,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:32,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:32,698 INFO L225 Difference]: With dead ends: 2734 [2021-06-06 00:07:32,699 INFO L226 Difference]: Without dead ends: 2734 [2021-06-06 00:07:32,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 485.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:07:32,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-06 00:07:32,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-06 00:07:32,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:32,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-06 00:07:32,730 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-06 00:07:32,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:32,730 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-06 00:07:32,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:32,730 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-06 00:07:32,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:32,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:32,732 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:32,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:32,949 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:32,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:32,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-06-06 00:07:32,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:32,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979973719] [2021-06-06 00:07:32,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:32,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:32,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979973719] [2021-06-06 00:07:32,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979973719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:32,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926413849] [2021-06-06 00:07:32,990 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 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 [2021-06-06 00:07:33,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:07:33,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:33,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:33,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:33,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926413849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:33,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:33,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:07:33,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705721637] [2021-06-06 00:07:33,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:07:33,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:33,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:07:33,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:07:33,125 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:33,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:33,842 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-06 00:07:33,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:07:33,843 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:33,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:33,850 INFO L225 Difference]: With dead ends: 2693 [2021-06-06 00:07:33,850 INFO L226 Difference]: Without dead ends: 2693 [2021-06-06 00:07:33,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 445.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:07:33,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-06 00:07:33,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-06 00:07:33,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:33,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-06 00:07:33,900 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-06 00:07:33,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:33,900 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-06 00:07:33,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:33,901 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-06 00:07:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:33,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:33,903 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, 1] [2021-06-06 00:07:34,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-06 00:07:34,125 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:34,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:34,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-06-06 00:07:34,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:34,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609215024] [2021-06-06 00:07:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:34,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:34,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609215024] [2021-06-06 00:07:34,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609215024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:34,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557637416] [2021-06-06 00:07:34,168 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 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 [2021-06-06 00:07:34,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:07:34,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:34,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:34,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:34,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:34,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557637416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:34,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:34,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:07:34,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133619355] [2021-06-06 00:07:34,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:07:34,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:34,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:07:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:07:34,286 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:35,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:35,003 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-06 00:07:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:07:35,004 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:35,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:35,010 INFO L225 Difference]: With dead ends: 2677 [2021-06-06 00:07:35,010 INFO L226 Difference]: Without dead ends: 2677 [2021-06-06 00:07:35,011 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:07:35,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-06 00:07:35,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-06 00:07:35,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-06 00:07:35,045 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-06 00:07:35,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:35,046 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-06 00:07:35,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:35,046 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-06 00:07:35,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:35,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:35,049 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:35,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-06 00:07:35,265 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:35,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:35,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-06-06 00:07:35,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:35,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309834326] [2021-06-06 00:07:35,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:35,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:35,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309834326] [2021-06-06 00:07:35,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309834326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:35,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793971695] [2021-06-06 00:07:35,301 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 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 [2021-06-06 00:07:35,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:07:35,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:35,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:35,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:35,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793971695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:35,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:35,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:07:35,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764002725] [2021-06-06 00:07:35,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:07:35,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:35,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:07:35,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:07:35,435 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:36,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:36,023 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-06 00:07:36,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:07:36,023 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:36,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:36,029 INFO L225 Difference]: With dead ends: 2474 [2021-06-06 00:07:36,029 INFO L226 Difference]: Without dead ends: 2470 [2021-06-06 00:07:36,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 327.7ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:07:36,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-06 00:07:36,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-06 00:07:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-06 00:07:36,060 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-06 00:07:36,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:36,060 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-06 00:07:36,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:36,060 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-06 00:07:36,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:36,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:36,062 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, 1] [2021-06-06 00:07:36,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-06 00:07:36,286 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:36,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:36,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-06-06 00:07:36,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:36,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461556322] [2021-06-06 00:07:36,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:36,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:36,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461556322] [2021-06-06 00:07:36,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461556322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:36,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967044216] [2021-06-06 00:07:36,348 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 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 [2021-06-06 00:07:36,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:07:36,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:36,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:36,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:36,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967044216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:36,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:36,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:07:36,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613959549] [2021-06-06 00:07:36,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:07:36,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:36,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:07:36,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:07:36,471 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:37,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:37,092 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-06 00:07:37,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:07:37,093 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:37,099 INFO L225 Difference]: With dead ends: 2514 [2021-06-06 00:07:37,099 INFO L226 Difference]: Without dead ends: 2514 [2021-06-06 00:07:37,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 370.7ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:07:37,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-06 00:07:37,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-06 00:07:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:37,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-06 00:07:37,129 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-06 00:07:37,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:37,129 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-06 00:07:37,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:37,130 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-06 00:07:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:37,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:37,131 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:37,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-06 00:07:37,352 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:37,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:37,352 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-06-06 00:07:37,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:37,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256717286] [2021-06-06 00:07:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:37,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:37,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256717286] [2021-06-06 00:07:37,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256717286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:37,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791242718] [2021-06-06 00:07:37,399 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:07:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:37,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:37,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:37,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791242718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:37,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:37,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:07:37,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392167097] [2021-06-06 00:07:37,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:07:37,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:37,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:07:37,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:07:37,535 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:38,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:38,111 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-06 00:07:38,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:07:38,111 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:38,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:38,117 INFO L225 Difference]: With dead ends: 2332 [2021-06-06 00:07:38,117 INFO L226 Difference]: Without dead ends: 2328 [2021-06-06 00:07:38,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 363.6ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:07:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-06 00:07:38,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-06 00:07:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:38,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-06 00:07:38,146 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-06 00:07:38,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:38,146 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-06 00:07:38,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:38,147 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-06 00:07:38,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:38,148 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:38,149 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, 1] [2021-06-06 00:07:38,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-06 00:07:38,371 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:38,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:38,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-06-06 00:07:38,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:38,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885641823] [2021-06-06 00:07:38,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:07:38,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:38,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885641823] [2021-06-06 00:07:38,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885641823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:38,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584374398] [2021-06-06 00:07:38,401 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 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 [2021-06-06 00:07:38,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:07:38,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:38,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:07:38,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:07:38,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584374398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:38,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:38,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-06 00:07:38,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672604165] [2021-06-06 00:07:38,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:07:38,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:38,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:07:38,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:07:38,501 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-06-06 00:07:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:38,582 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-06 00:07:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:07:38,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-06-06 00:07:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:38,585 INFO L225 Difference]: With dead ends: 929 [2021-06-06 00:07:38,585 INFO L226 Difference]: Without dead ends: 929 [2021-06-06 00:07:38,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:07:38,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-06 00:07:38,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-06 00:07:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-06 00:07:38,601 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-06 00:07:38,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:38,601 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-06 00:07:38,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-06-06 00:07:38,602 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-06 00:07:38,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:38,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:38,603 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, 1] [2021-06-06 00:07:38,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:38,825 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:38,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:38,825 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-06-06 00:07:38,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:38,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093594815] [2021-06-06 00:07:38,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:38,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:38,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093594815] [2021-06-06 00:07:38,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093594815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:38,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007838502] [2021-06-06 00:07:38,862 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 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 [2021-06-06 00:07:38,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:07:38,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:38,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:38,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:38,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007838502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:38,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:38,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-06 00:07:38,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558287736] [2021-06-06 00:07:38,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:07:38,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:38,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:07:38,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:07:38,951 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) 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) [2021-06-06 00:07:39,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:39,266 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-06 00:07:39,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:07:39,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) 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 24 [2021-06-06 00:07:39,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:39,269 INFO L225 Difference]: With dead ends: 1555 [2021-06-06 00:07:39,269 INFO L226 Difference]: Without dead ends: 1555 [2021-06-06 00:07:39,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:07:39,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-06 00:07:39,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-06 00:07:39,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-06 00:07:39,289 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-06 00:07:39,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:39,289 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-06 00:07:39,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) 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) [2021-06-06 00:07:39,290 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-06 00:07:39,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:39,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:39,291 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:39,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:39,505 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:39,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:39,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-06-06 00:07:39,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:39,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885073647] [2021-06-06 00:07:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:39,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:39,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885073647] [2021-06-06 00:07:39,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885073647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:39,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159643199] [2021-06-06 00:07:39,537 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 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 [2021-06-06 00:07:39,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:07:39,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:39,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:39,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:39,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159643199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:39,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:39,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-06 00:07:39,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057122979] [2021-06-06 00:07:39,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:07:39,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:39,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:07:39,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:07:39,612 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-06-06 00:07:39,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:39,849 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-06 00:07:39,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:07:39,849 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 24 [2021-06-06 00:07:39,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:39,853 INFO L225 Difference]: With dead ends: 1605 [2021-06-06 00:07:39,853 INFO L226 Difference]: Without dead ends: 1605 [2021-06-06 00:07:39,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:07:39,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-06 00:07:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-06 00:07:39,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-06 00:07:39,873 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-06 00:07:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:39,873 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-06 00:07:39,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-06-06 00:07:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-06 00:07:39,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:39,875 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:39,875 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:40,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:40,097 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:40,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:40,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-06-06 00:07:40,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:40,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258729008] [2021-06-06 00:07:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:07:40,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:40,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258729008] [2021-06-06 00:07:40,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258729008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:40,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227829833] [2021-06-06 00:07:40,127 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 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 [2021-06-06 00:07:40,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:07:40,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:40,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:40,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:07:40,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227829833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:40,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:40,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-06 00:07:40,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500416531] [2021-06-06 00:07:40,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:07:40,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:40,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:07:40,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:07:40,198 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-06-06 00:07:40,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:40,385 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-06 00:07:40,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:07:40,385 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 24 [2021-06-06 00:07:40,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:40,388 INFO L225 Difference]: With dead ends: 1524 [2021-06-06 00:07:40,388 INFO L226 Difference]: Without dead ends: 1520 [2021-06-06 00:07:40,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:07:40,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-06 00:07:40,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-06 00:07:40,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:40,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-06 00:07:40,403 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-06 00:07:40,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:40,403 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-06 00:07:40,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-06-06 00:07:40,404 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-06 00:07:40,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:40,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:40,405 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:40,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-06 00:07:40,611 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:40,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:40,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-06-06 00:07:40,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:40,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298333834] [2021-06-06 00:07:40,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:40,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:40,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298333834] [2021-06-06 00:07:40,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298333834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:40,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109086275] [2021-06-06 00:07:40,647 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 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 [2021-06-06 00:07:40,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:07:40,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:40,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:40,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:40,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109086275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:40,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:40,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-06 00:07:40,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980779790] [2021-06-06 00:07:40,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:07:40,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:40,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:07:40,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:07:40,720 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) 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) [2021-06-06 00:07:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:40,931 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-06 00:07:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:07:40,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) 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 24 [2021-06-06 00:07:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:40,934 INFO L225 Difference]: With dead ends: 1508 [2021-06-06 00:07:40,934 INFO L226 Difference]: Without dead ends: 1496 [2021-06-06 00:07:40,934 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:07:40,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-06 00:07:40,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-06 00:07:40,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:40,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-06 00:07:40,960 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-06 00:07:40,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:40,960 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-06 00:07:40,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) 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) [2021-06-06 00:07:40,960 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-06 00:07:40,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:40,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:40,961 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:41,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:41,162 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:41,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:41,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-06-06 00:07:41,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:41,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930935757] [2021-06-06 00:07:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:41,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:41,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930935757] [2021-06-06 00:07:41,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930935757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:41,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412171909] [2021-06-06 00:07:41,223 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:41,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:07:41,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:41,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:41,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:41,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412171909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:41,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:41,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:07:41,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988757057] [2021-06-06 00:07:41,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:07:41,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:41,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:07:41,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:07:41,329 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:41,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:41,844 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-06 00:07:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:07:41,845 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:41,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:41,849 INFO L225 Difference]: With dead ends: 2412 [2021-06-06 00:07:41,849 INFO L226 Difference]: Without dead ends: 2412 [2021-06-06 00:07:41,850 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 338.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:07:41,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-06 00:07:41,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-06 00:07:41,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:41,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-06 00:07:41,875 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-06 00:07:41,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:41,875 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-06 00:07:41,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:41,875 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-06 00:07:41,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:41,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:41,877 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:42,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-06 00:07:42,093 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:42,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-06-06 00:07:42,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:42,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228684433] [2021-06-06 00:07:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:42,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:42,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228684433] [2021-06-06 00:07:42,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228684433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:42,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586714504] [2021-06-06 00:07:42,133 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 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 [2021-06-06 00:07:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:42,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:42,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:42,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586714504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:42,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:42,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:07:42,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054064479] [2021-06-06 00:07:42,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:07:42,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:42,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:07:42,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:07:42,246 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:42,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:42,702 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-06 00:07:42,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:07:42,703 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:42,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:42,707 INFO L225 Difference]: With dead ends: 2335 [2021-06-06 00:07:42,707 INFO L226 Difference]: Without dead ends: 2335 [2021-06-06 00:07:42,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 307.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:07:42,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-06 00:07:42,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-06 00:07:42,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:42,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-06 00:07:42,733 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-06 00:07:42,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:42,733 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-06 00:07:42,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:42,733 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-06 00:07:42,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:42,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:42,735 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:42,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:42,957 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:42,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:42,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-06-06 00:07:42,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:42,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862185177] [2021-06-06 00:07:42,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:42,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:42,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862185177] [2021-06-06 00:07:42,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862185177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:42,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855523373] [2021-06-06 00:07:42,994 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 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 [2021-06-06 00:07:43,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:07:43,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:43,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:43,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:43,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855523373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:43,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:43,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:07:43,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723265035] [2021-06-06 00:07:43,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:07:43,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:43,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:07:43,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:07:43,125 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:43,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:43,532 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-06 00:07:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:07:43,534 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:43,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:43,537 INFO L225 Difference]: With dead ends: 2285 [2021-06-06 00:07:43,537 INFO L226 Difference]: Without dead ends: 2285 [2021-06-06 00:07:43,538 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:07:43,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-06 00:07:43,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-06 00:07:43,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:43,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-06 00:07:43,562 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-06 00:07:43,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:43,563 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-06 00:07:43,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:43,563 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-06 00:07:43,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:43,564 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:43,564 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, 1] [2021-06-06 00:07:43,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-06 00:07:43,787 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:43,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:43,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-06-06 00:07:43,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:43,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797480948] [2021-06-06 00:07:43,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:43,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:43,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797480948] [2021-06-06 00:07:43,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797480948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:43,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245979249] [2021-06-06 00:07:43,824 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 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 [2021-06-06 00:07:43,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:07:43,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:43,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:43,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:43,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245979249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:43,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:43,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:07:43,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718285849] [2021-06-06 00:07:43,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:07:43,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:43,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:07:43,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:07:43,922 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:44,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:44,306 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-06 00:07:44,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:07:44,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:44,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:44,310 INFO L225 Difference]: With dead ends: 2176 [2021-06-06 00:07:44,310 INFO L226 Difference]: Without dead ends: 2172 [2021-06-06 00:07:44,310 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 250.1ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:07:44,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-06 00:07:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-06 00:07:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-06 00:07:44,327 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-06 00:07:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:44,327 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-06 00:07:44,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-06 00:07:44,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:44,329 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:44,329 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, 1] [2021-06-06 00:07:44,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:44,529 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:44,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:44,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-06-06 00:07:44,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:44,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262368030] [2021-06-06 00:07:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:44,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:44,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262368030] [2021-06-06 00:07:44,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262368030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:44,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035645131] [2021-06-06 00:07:44,567 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 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 [2021-06-06 00:07:44,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:07:44,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:44,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:44,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:44,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035645131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:44,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:44,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:07:44,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794045959] [2021-06-06 00:07:44,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:07:44,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:44,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:07:44,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:07:44,673 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:45,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:45,052 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-06 00:07:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:07:45,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:45,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:45,055 INFO L225 Difference]: With dead ends: 2199 [2021-06-06 00:07:45,055 INFO L226 Difference]: Without dead ends: 2199 [2021-06-06 00:07:45,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 244.5ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:07:45,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-06 00:07:45,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-06 00:07:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:45,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-06 00:07:45,072 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-06 00:07:45,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:45,072 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-06 00:07:45,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:45,072 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-06 00:07:45,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:45,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:45,073 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:45,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-06 00:07:45,274 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:45,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:45,274 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-06-06 00:07:45,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:45,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132914203] [2021-06-06 00:07:45,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:45,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:45,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132914203] [2021-06-06 00:07:45,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132914203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:45,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724250301] [2021-06-06 00:07:45,310 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:45,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:07:45,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:45,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:45,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:45,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724250301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:45,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:45,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:07:45,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209504731] [2021-06-06 00:07:45,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:07:45,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:45,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:07:45,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:07:45,415 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:45,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:45,776 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-06 00:07:45,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:07:45,776 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:45,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:45,780 INFO L225 Difference]: With dead ends: 2156 [2021-06-06 00:07:45,780 INFO L226 Difference]: Without dead ends: 2152 [2021-06-06 00:07:45,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 245.9ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:07:45,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-06 00:07:45,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-06 00:07:45,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:45,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-06 00:07:45,805 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-06 00:07:45,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:45,805 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-06 00:07:45,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:45,805 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-06 00:07:45,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:45,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:45,807 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:46,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-06 00:07:46,021 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:46,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:46,021 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-06-06 00:07:46,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:46,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77476478] [2021-06-06 00:07:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:46,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:46,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77476478] [2021-06-06 00:07:46,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77476478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:46,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378931831] [2021-06-06 00:07:46,057 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 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 [2021-06-06 00:07:46,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:07:46,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:46,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:46,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:46,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378931831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:46,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:46,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:07:46,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072348060] [2021-06-06 00:07:46,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:07:46,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:46,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:07:46,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:07:46,161 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:46,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:46,486 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-06 00:07:46,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:07:46,487 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:46,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:46,489 INFO L225 Difference]: With dead ends: 2097 [2021-06-06 00:07:46,489 INFO L226 Difference]: Without dead ends: 2097 [2021-06-06 00:07:46,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:07:46,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-06 00:07:46,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-06 00:07:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:46,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-06 00:07:46,507 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-06 00:07:46,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:46,507 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-06 00:07:46,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:46,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-06 00:07:46,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:46,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:46,509 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:46,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:46,710 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:46,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:46,710 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-06-06 00:07:46,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:46,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442295803] [2021-06-06 00:07:46,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:46,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:46,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442295803] [2021-06-06 00:07:46,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442295803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:46,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25580674] [2021-06-06 00:07:46,746 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 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 [2021-06-06 00:07:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:46,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:46,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:46,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25580674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:46,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:46,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:07:46,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901026828] [2021-06-06 00:07:46,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:07:46,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:46,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:07:46,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:07:46,834 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:47,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:47,104 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-06 00:07:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:07:47,105 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:47,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:47,107 INFO L225 Difference]: With dead ends: 1963 [2021-06-06 00:07:47,107 INFO L226 Difference]: Without dead ends: 1959 [2021-06-06 00:07:47,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:07:47,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-06 00:07:47,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-06 00:07:47,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:47,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-06 00:07:47,129 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-06 00:07:47,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:47,129 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-06 00:07:47,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:47,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-06 00:07:47,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:47,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:47,131 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:47,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:47,345 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:47,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:47,345 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-06-06 00:07:47,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:47,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642275936] [2021-06-06 00:07:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:47,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:47,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642275936] [2021-06-06 00:07:47,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642275936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:47,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71498401] [2021-06-06 00:07:47,375 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 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 [2021-06-06 00:07:47,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:07:47,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:47,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:47,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:47,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71498401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:47,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:47,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:07:47,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957935307] [2021-06-06 00:07:47,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:07:47,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:47,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:07:47,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:07:47,449 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:47,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:47,679 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-06 00:07:47,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:07:47,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:47,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:47,681 INFO L225 Difference]: With dead ends: 1728 [2021-06-06 00:07:47,681 INFO L226 Difference]: Without dead ends: 1716 [2021-06-06 00:07:47,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:07:47,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-06 00:07:47,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-06 00:07:47,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-06 00:07:47,696 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-06 00:07:47,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:47,696 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-06 00:07:47,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:47,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-06 00:07:47,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:47,698 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:47,698 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:47,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:47,913 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:47,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:47,913 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-06-06 00:07:47,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:47,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034170266] [2021-06-06 00:07:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:47,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:47,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034170266] [2021-06-06 00:07:47,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034170266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:47,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916228767] [2021-06-06 00:07:47,947 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 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 [2021-06-06 00:07:47,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:07:47,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:47,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:47,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:48,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916228767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:48,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:48,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:07:48,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025483144] [2021-06-06 00:07:48,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:07:48,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:48,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:07:48,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:07:48,063 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:48,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:48,380 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-06 00:07:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:07:48,381 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:48,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:48,383 INFO L225 Difference]: With dead ends: 1821 [2021-06-06 00:07:48,383 INFO L226 Difference]: Without dead ends: 1821 [2021-06-06 00:07:48,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:07:48,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-06 00:07:48,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-06 00:07:48,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-06 00:07:48,406 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-06 00:07:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:48,407 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-06 00:07:48,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-06 00:07:48,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:48,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:48,409 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:48,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:48,625 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-06-06 00:07:48,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:48,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949241311] [2021-06-06 00:07:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:48,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:48,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949241311] [2021-06-06 00:07:48,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949241311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:48,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971384501] [2021-06-06 00:07:48,658 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 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 [2021-06-06 00:07:48,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:07:48,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:48,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:48,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:48,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971384501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:48,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:48,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-06 00:07:48,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384787328] [2021-06-06 00:07:48,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:07:48,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:48,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:07:48,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:07:48,773 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:49,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:49,052 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-06 00:07:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:07:49,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:49,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:49,055 INFO L225 Difference]: With dead ends: 1790 [2021-06-06 00:07:49,055 INFO L226 Difference]: Without dead ends: 1786 [2021-06-06 00:07:49,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:07:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-06 00:07:49,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-06 00:07:49,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:49,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-06 00:07:49,073 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-06 00:07:49,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:49,073 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-06 00:07:49,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:49,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-06 00:07:49,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:07:49,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:49,076 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, 1] [2021-06-06 00:07:49,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-06 00:07:49,299 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:49,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:49,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-06-06 00:07:49,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:49,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740405424] [2021-06-06 00:07:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:49,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:49,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740405424] [2021-06-06 00:07:49,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740405424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:49,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110118643] [2021-06-06 00:07:49,342 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 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 [2021-06-06 00:07:49,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:07:49,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:49,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:07:49,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:49,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110118643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:49,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:49,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-06 00:07:49,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511824040] [2021-06-06 00:07:49,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:07:49,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:49,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:07:49,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:07:49,441 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:49,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:49,601 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-06 00:07:49,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:07:49,601 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:07:49,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:49,603 INFO L225 Difference]: With dead ends: 1649 [2021-06-06 00:07:49,603 INFO L226 Difference]: Without dead ends: 1637 [2021-06-06 00:07:49,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:07:49,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-06 00:07:49,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-06 00:07:49,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-06 00:07:49,618 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-06 00:07:49,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:49,618 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-06 00:07:49,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:49,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-06 00:07:49,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:49,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:49,620 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:49,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:49,821 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:49,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:49,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-06-06 00:07:49,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:49,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263719142] [2021-06-06 00:07:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:50,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:50,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263719142] [2021-06-06 00:07:50,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263719142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:50,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637369898] [2021-06-06 00:07:50,336 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 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 [2021-06-06 00:07:50,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:07:50,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:50,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:07:50,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:50,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:50,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:50,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:50,948 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 33 treesize of output 19 [2021-06-06 00:07:50,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:50,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:50,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:50,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:50,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:07:50,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:50,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:50,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:50,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:50,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:07:50,963 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:50,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:50,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:50,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:50,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:07:50,969 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:50,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:50,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:50,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:50,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-06 00:07:50,981 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:50,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:50,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:50,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:50,987 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 28 treesize of output 16 [2021-06-06 00:07:50,988 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:50,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:50,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:50,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:50,993 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 33 treesize of output 19 [2021-06-06 00:07:50,993 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:50,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:50,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:50,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:50,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-06 00:07:51,000 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:51,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:51,005 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 28 treesize of output 16 [2021-06-06 00:07:51,006 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:51,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:51,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:07:51,012 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:51,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:51,018 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 30 treesize of output 13 [2021-06-06 00:07:51,019 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:51,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:51,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:07:51,024 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:51,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:51,029 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 28 treesize of output 16 [2021-06-06 00:07:51,030 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:51,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:51,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:07:51,037 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:51,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:51,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:07:51,043 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:51,072 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-06 00:07:51,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:07:51,074 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-06 00:07:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:51,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637369898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:51,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:51,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:07:51,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213514440] [2021-06-06 00:07:51,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:07:51,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:51,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:07:51,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:07:51,103 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:51,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:51,922 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-06 00:07:51,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:07:51,922 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:07:51,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:51,924 INFO L225 Difference]: With dead ends: 1517 [2021-06-06 00:07:51,924 INFO L226 Difference]: Without dead ends: 1502 [2021-06-06 00:07:51,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1177.5ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:07:51,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-06 00:07:51,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-06 00:07:51,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:51,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-06 00:07:51,938 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-06 00:07:51,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:51,938 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-06 00:07:51,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:51,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-06 00:07:51,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:51,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:51,941 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:52,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-06 00:07:52,142 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:52,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:52,142 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-06-06 00:07:52,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:52,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973920336] [2021-06-06 00:07:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:52,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:52,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973920336] [2021-06-06 00:07:52,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973920336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:52,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150732196] [2021-06-06 00:07:52,607 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 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 [2021-06-06 00:07:52,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:07:52,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:52,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:07:52,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:53,156 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-06-06 00:07:53,214 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3], 2=[A, v_prenex_5]} [2021-06-06 00:07:53,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:53,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:07:53,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:53,323 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-06 00:07:53,323 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-06-06 00:07:53,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:53,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:53,327 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 23 treesize of output 13 [2021-06-06 00:07:53,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:53,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:07:53,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:53,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:07:53,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:53,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:53,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:53,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:07:53,378 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:53,425 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-06-06 00:07:53,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:07:53,428 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:25 [2021-06-06 00:07:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:53,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150732196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:53,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:53,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:07:53,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111410129] [2021-06-06 00:07:53,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:07:53,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:53,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:07:53,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:07:53,482 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:53,990 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-06 00:07:54,313 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-06 00:07:54,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:54,910 INFO L93 Difference]: Finished difference Result 1616 states and 5213 transitions. [2021-06-06 00:07:54,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:07:54,910 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:07:54,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:54,912 INFO L225 Difference]: With dead ends: 1616 [2021-06-06 00:07:54,912 INFO L226 Difference]: Without dead ends: 1571 [2021-06-06 00:07:54,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1827.4ms TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:07:54,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2021-06-06 00:07:54,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1171. [2021-06-06 00:07:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.347008547008547) internal successors, (3916), 1170 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:54,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3916 transitions. [2021-06-06 00:07:54,928 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3916 transitions. Word has length 26 [2021-06-06 00:07:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:54,929 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 3916 transitions. [2021-06-06 00:07:54,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:54,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3916 transitions. [2021-06-06 00:07:54,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:54,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:54,931 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:55,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:55,144 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:55,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:55,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-06-06 00:07:55,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:55,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273853996] [2021-06-06 00:07:55,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:07:55,608 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-06-06 00:07:55,727 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-06 00:07:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:55,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:07:55,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273853996] [2021-06-06 00:07:55,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273853996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:55,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238471847] [2021-06-06 00:07:55,810 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 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 [2021-06-06 00:07:55,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:07:55,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:07:55,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:07:55,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:07:56,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,537 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 39 treesize of output 19 [2021-06-06 00:07:56,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:56,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,548 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 30 treesize of output 16 [2021-06-06 00:07:56,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:56,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,558 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 32 treesize of output 16 [2021-06-06 00:07:56,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:56,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,576 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 35 treesize of output 19 [2021-06-06 00:07:56,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:56,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,589 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 35 treesize of output 19 [2021-06-06 00:07:56,590 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:56,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,598 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 41 treesize of output 13 [2021-06-06 00:07:56,599 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:56,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,607 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 41 treesize of output 16 [2021-06-06 00:07:56,608 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:56,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,616 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 33 treesize of output 13 [2021-06-06 00:07:56,618 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:56,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,626 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 39 treesize of output 13 [2021-06-06 00:07:56,628 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:56,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,637 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 28 treesize of output 13 [2021-06-06 00:07:56,638 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:56,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,648 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 34 treesize of output 16 [2021-06-06 00:07:56,649 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:56,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,659 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 37 treesize of output 19 [2021-06-06 00:07:56,660 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:56,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,667 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 30 treesize of output 16 [2021-06-06 00:07:56,668 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:56,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,675 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 39 treesize of output 16 [2021-06-06 00:07:56,676 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:56,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:07:56,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:07:56,681 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 28 treesize of output 13 [2021-06-06 00:07:56,682 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:07:56,701 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-06 00:07:56,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:07:56,702 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-06 00:07:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:07:56,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238471847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:07:56,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:07:56,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-06 00:07:56,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426572232] [2021-06-06 00:07:56,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:07:56,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:07:56,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:07:56,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:07:56,728 INFO L87 Difference]: Start difference. First operand 1171 states and 3916 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:57,140 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2021-06-06 00:07:57,931 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 45 [2021-06-06 00:07:58,165 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2021-06-06 00:07:58,328 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2021-06-06 00:07:58,457 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 39 [2021-06-06 00:07:58,761 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-06-06 00:07:58,917 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-06-06 00:07:59,115 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-06 00:07:59,289 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2021-06-06 00:07:59,505 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-06 00:07:59,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:07:59,570 INFO L93 Difference]: Finished difference Result 1671 states and 5380 transitions. [2021-06-06 00:07:59,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:07:59,570 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:07:59,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:07:59,572 INFO L225 Difference]: With dead ends: 1671 [2021-06-06 00:07:59,572 INFO L226 Difference]: Without dead ends: 1656 [2021-06-06 00:07:59,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 3094.9ms TimeCoverageRelationStatistics Valid=361, Invalid=1801, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:07:59,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-06-06 00:07:59,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1201. [2021-06-06 00:07:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3316666666666666) internal successors, (3998), 1200 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 3998 transitions. [2021-06-06 00:07:59,588 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 3998 transitions. Word has length 26 [2021-06-06 00:07:59,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:07:59,588 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 3998 transitions. [2021-06-06 00:07:59,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:07:59,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 3998 transitions. [2021-06-06 00:07:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:07:59,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:07:59,590 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:07:59,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:07:59,791 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:07:59,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:07:59,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-06-06 00:07:59,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:07:59,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254125954] [2021-06-06 00:07:59,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:07:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:00,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:00,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254125954] [2021-06-06 00:08:00,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254125954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:00,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620952156] [2021-06-06 00:08:00,175 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 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 [2021-06-06 00:08:00,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:08:00,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:00,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:08:00,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:00,626 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_9], 2=[A, v_prenex_7]} [2021-06-06 00:08:00,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:00,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:08:00,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:00,741 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-06 00:08:00,742 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-06-06 00:08:00,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:00,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:00,747 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 23 treesize of output 13 [2021-06-06 00:08:00,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:00,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:00,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:00,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:00,775 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 23 treesize of output 13 [2021-06-06 00:08:00,776 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:00,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:00,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:08:00,797 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:15 [2021-06-06 00:08:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:00,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620952156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:00,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:00,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:08:00,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969916229] [2021-06-06 00:08:00,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:08:00,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:00,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:08:00,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:08:00,825 INFO L87 Difference]: Start difference. First operand 1201 states and 3998 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:01,807 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-06-06 00:08:01,947 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-06 00:08:02,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:02,070 INFO L93 Difference]: Finished difference Result 1703 states and 5445 transitions. [2021-06-06 00:08:02,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:08:02,070 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:02,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:02,073 INFO L225 Difference]: With dead ends: 1703 [2021-06-06 00:08:02,073 INFO L226 Difference]: Without dead ends: 1673 [2021-06-06 00:08:02,073 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1427.7ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:08:02,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2021-06-06 00:08:02,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1210. [2021-06-06 00:08:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 3.329197684036394) internal successors, (4025), 1209 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 4025 transitions. [2021-06-06 00:08:02,088 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 4025 transitions. Word has length 26 [2021-06-06 00:08:02,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:02,088 INFO L482 AbstractCegarLoop]: Abstraction has 1210 states and 4025 transitions. [2021-06-06 00:08:02,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:02,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 4025 transitions. [2021-06-06 00:08:02,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:02,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:02,090 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:02,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-06 00:08:02,290 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:02,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:02,291 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-06-06 00:08:02,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:02,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690465910] [2021-06-06 00:08:02,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:02,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:02,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690465910] [2021-06-06 00:08:02,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690465910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:02,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244440163] [2021-06-06 00:08:02,770 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 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 [2021-06-06 00:08:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:02,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:08:02,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:03,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,501 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 30 treesize of output 16 [2021-06-06 00:08:03,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:03,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,512 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 41 treesize of output 16 [2021-06-06 00:08:03,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:03,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,522 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 41 treesize of output 13 [2021-06-06 00:08:03,523 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:03,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,532 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 28 treesize of output 13 [2021-06-06 00:08:03,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:03,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,545 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 35 treesize of output 19 [2021-06-06 00:08:03,545 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:03,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,555 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 33 treesize of output 13 [2021-06-06 00:08:03,556 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:03,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,566 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 37 treesize of output 19 [2021-06-06 00:08:03,567 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:03,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,577 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 32 treesize of output 16 [2021-06-06 00:08:03,577 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:03,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,587 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 39 treesize of output 19 [2021-06-06 00:08:03,588 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:03,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,596 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 34 treesize of output 16 [2021-06-06 00:08:03,597 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:03,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,607 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 39 treesize of output 16 [2021-06-06 00:08:03,608 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:03,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:08:03,619 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:03,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,628 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 39 treesize of output 13 [2021-06-06 00:08:03,629 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:03,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,639 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:08:03,640 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:03,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:03,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:03,645 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 28 treesize of output 13 [2021-06-06 00:08:03,645 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:03,668 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-06 00:08:03,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:08:03,669 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-06 00:08:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:03,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244440163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:03,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:03,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-06 00:08:03,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873557165] [2021-06-06 00:08:03,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:08:03,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:03,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:08:03,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:08:03,701 INFO L87 Difference]: Start difference. First operand 1210 states and 4025 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:05,784 INFO L93 Difference]: Finished difference Result 1830 states and 5830 transitions. [2021-06-06 00:08:05,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:08:05,785 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:05,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:05,788 INFO L225 Difference]: With dead ends: 1830 [2021-06-06 00:08:05,788 INFO L226 Difference]: Without dead ends: 1815 [2021-06-06 00:08:05,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 2104.1ms TimeCoverageRelationStatistics Valid=344, Invalid=1548, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:08:05,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-06-06 00:08:05,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1222. [2021-06-06 00:08:05,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.3374283374283373) internal successors, (4075), 1221 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:05,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4075 transitions. [2021-06-06 00:08:05,805 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4075 transitions. Word has length 26 [2021-06-06 00:08:05,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:05,805 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 4075 transitions. [2021-06-06 00:08:05,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:05,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4075 transitions. [2021-06-06 00:08:05,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:05,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:05,808 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:06,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-06 00:08:06,008 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:06,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:06,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-06-06 00:08:06,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:06,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141848052] [2021-06-06 00:08:06,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:06,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:06,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141848052] [2021-06-06 00:08:06,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141848052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:06,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152689267] [2021-06-06 00:08:06,522 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 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 [2021-06-06 00:08:06,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:08:06,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:06,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:08:06,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:07,299 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-06 00:08:07,300 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 47 [2021-06-06 00:08:07,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,355 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-06-06 00:08:07,356 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 28 treesize of output 32 [2021-06-06 00:08:07,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,400 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-06 00:08:07,400 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 30 [2021-06-06 00:08:07,402 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,445 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-06 00:08:07,445 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 26 treesize of output 40 [2021-06-06 00:08:07,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,497 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-06 00:08:07,498 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 28 treesize of output 40 [2021-06-06 00:08:07,510 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,563 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-06 00:08:07,563 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 28 treesize of output 40 [2021-06-06 00:08:07,572 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,597 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:08:07,597 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 1 [2021-06-06 00:08:07,598 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,644 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-06 00:08:07,645 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 35 treesize of output 51 [2021-06-06 00:08:07,656 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,715 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-06 00:08:07,715 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 47 [2021-06-06 00:08:07,725 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,767 INFO L354 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2021-06-06 00:08:07,767 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 31 treesize of output 38 [2021-06-06 00:08:07,769 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,788 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:08:07,788 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 35 treesize of output 1 [2021-06-06 00:08:07,789 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,805 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:08:07,805 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 28 treesize of output 1 [2021-06-06 00:08:07,806 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,849 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-06 00:08:07,850 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 35 treesize of output 51 [2021-06-06 00:08:07,862 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,910 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-06 00:08:07,910 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 21 treesize of output 45 [2021-06-06 00:08:07,930 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,966 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-06 00:08:07,966 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 26 treesize of output 40 [2021-06-06 00:08:07,973 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:07,988 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:08:07,988 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 35 treesize of output 1 [2021-06-06 00:08:07,989 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:08,525 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-06-06 00:08:08,525 INFO L628 ElimStorePlain]: treesize reduction 219, result has 60.0 percent of original size [2021-06-06 00:08:08,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-06 00:08:08,537 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:833, output treesize:385 [2021-06-06 00:08:08,773 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-06-06 00:08:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:08,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152689267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:08,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:08,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-06 00:08:08,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942814101] [2021-06-06 00:08:08,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:08:08,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:08,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:08:08,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:08:08,893 INFO L87 Difference]: Start difference. First operand 1222 states and 4075 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:10,432 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-06-06 00:08:10,667 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-06-06 00:08:11,071 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-06-06 00:08:11,444 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-06 00:08:11,795 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-06-06 00:08:12,074 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 66 [2021-06-06 00:08:12,518 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2021-06-06 00:08:12,742 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2021-06-06 00:08:12,921 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 41 [2021-06-06 00:08:13,357 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-06-06 00:08:13,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:13,451 INFO L93 Difference]: Finished difference Result 2502 states and 7680 transitions. [2021-06-06 00:08:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-06 00:08:13,452 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:13,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:13,455 INFO L225 Difference]: With dead ends: 2502 [2021-06-06 00:08:13,455 INFO L226 Difference]: Without dead ends: 2457 [2021-06-06 00:08:13,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 4772.9ms TimeCoverageRelationStatistics Valid=695, Invalid=3727, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:08:13,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-06 00:08:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 1394. [2021-06-06 00:08:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.3058147882268485) internal successors, (4605), 1393 states have internal predecessors, (4605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:13,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 4605 transitions. [2021-06-06 00:08:13,475 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 4605 transitions. Word has length 26 [2021-06-06 00:08:13,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:13,475 INFO L482 AbstractCegarLoop]: Abstraction has 1394 states and 4605 transitions. [2021-06-06 00:08:13,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:13,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 4605 transitions. [2021-06-06 00:08:13,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:13,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:13,477 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, 1, 1, 1] [2021-06-06 00:08:13,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-06 00:08:13,678 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:13,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:13,678 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-06-06 00:08:13,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:13,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440366371] [2021-06-06 00:08:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:14,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:14,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440366371] [2021-06-06 00:08:14,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440366371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:14,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575342568] [2021-06-06 00:08:14,040 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 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 [2021-06-06 00:08:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:14,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:08:14,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:14,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:14,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:14,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,566 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 30 treesize of output 13 [2021-06-06 00:08:14,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:14,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,573 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 33 treesize of output 19 [2021-06-06 00:08:14,574 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:14,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,580 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 26 treesize of output 13 [2021-06-06 00:08:14,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:14,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:08:14,589 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:14,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,595 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 28 treesize of output 16 [2021-06-06 00:08:14,595 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:14,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,601 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 21 treesize of output 13 [2021-06-06 00:08:14,602 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:14,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,608 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 33 treesize of output 19 [2021-06-06 00:08:14,609 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:14,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,615 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 30 treesize of output 13 [2021-06-06 00:08:14,616 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:14,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,622 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 28 treesize of output 16 [2021-06-06 00:08:14,623 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:14,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,630 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 33 treesize of output 19 [2021-06-06 00:08:14,631 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:14,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:14,637 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:14,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:08:14,644 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:14,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:14,650 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:14,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:14,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:14,658 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 30 treesize of output 16 [2021-06-06 00:08:14,659 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:14,681 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-06 00:08:14,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:08:14,683 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-06 00:08:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:14,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575342568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:14,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:14,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:08:14,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409757073] [2021-06-06 00:08:14,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:08:14,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:14,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:08:14,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:08:14,711 INFO L87 Difference]: Start difference. First operand 1394 states and 4605 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:15,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:15,570 INFO L93 Difference]: Finished difference Result 1799 states and 5825 transitions. [2021-06-06 00:08:15,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:08:15,570 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:15,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:15,573 INFO L225 Difference]: With dead ends: 1799 [2021-06-06 00:08:15,574 INFO L226 Difference]: Without dead ends: 1784 [2021-06-06 00:08:15,574 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1139.6ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:08:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-06 00:08:15,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1405. [2021-06-06 00:08:15,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 3.3034188034188032) internal successors, (4638), 1404 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 4638 transitions. [2021-06-06 00:08:15,593 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 4638 transitions. Word has length 26 [2021-06-06 00:08:15,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:15,593 INFO L482 AbstractCegarLoop]: Abstraction has 1405 states and 4638 transitions. [2021-06-06 00:08:15,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:15,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 4638 transitions. [2021-06-06 00:08:15,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:15,595 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:15,595 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:15,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-06 00:08:15,796 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:15,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:15,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-06-06 00:08:15,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:15,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071612179] [2021-06-06 00:08:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:16,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:16,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071612179] [2021-06-06 00:08:16,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071612179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:16,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615773414] [2021-06-06 00:08:16,226 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 [2021-06-06 00:08:16,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:08:16,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:16,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:08:16,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:16,605 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-06-06 00:08:16,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:16,836 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:08:16,837 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 43 treesize of output 39 [2021-06-06 00:08:16,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:16,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:16,859 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-06 00:08:16,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 25 [2021-06-06 00:08:16,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:17,259 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 148 [2021-06-06 00:08:17,260 INFO L628 ElimStorePlain]: treesize reduction 100, result has 83.4 percent of original size [2021-06-06 00:08:17,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:17,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:17,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 36 [2021-06-06 00:08:17,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:17,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:17,314 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-06 00:08:17,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 1 [2021-06-06 00:08:17,315 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:17,467 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-06-06 00:08:17,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:17,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:17,503 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:08:17,503 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 33 [2021-06-06 00:08:17,507 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:17,657 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-06 00:08:17,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:17,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:17,678 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-06 00:08:17,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-06-06 00:08:17,680 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:17,839 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-06 00:08:17,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:17,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:17,860 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-06 00:08:17,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 29 [2021-06-06 00:08:17,863 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:18,007 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-06 00:08:18,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:18,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:18,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:18,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-06-06 00:08:18,033 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:18,171 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-06 00:08:18,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:18,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:18,193 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:08:18,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-06-06 00:08:18,197 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:18,326 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-06 00:08:18,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:18,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:18,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:18,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 36 [2021-06-06 00:08:18,349 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:18,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:18,360 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-06 00:08:18,360 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 40 treesize of output 18 [2021-06-06 00:08:18,361 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:18,581 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-06-06 00:08:18,582 INFO L628 ElimStorePlain]: treesize reduction 23, result has 92.5 percent of original size [2021-06-06 00:08:18,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:08:18,600 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:679, output treesize:449 [2021-06-06 00:08:18,836 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-06-06 00:08:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:18,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615773414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:18,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:18,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:08:18,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082672594] [2021-06-06 00:08:18,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:08:18,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:18,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:08:18,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:08:18,960 INFO L87 Difference]: Start difference. First operand 1405 states and 4638 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:20,036 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-06-06 00:08:20,194 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 33 [2021-06-06 00:08:20,440 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2021-06-06 00:08:20,829 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-06 00:08:21,034 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-06 00:08:21,292 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-06-06 00:08:21,676 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-06 00:08:22,251 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2021-06-06 00:08:22,592 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2021-06-06 00:08:22,788 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-06 00:08:23,419 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2021-06-06 00:08:23,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:23,924 INFO L93 Difference]: Finished difference Result 2194 states and 6873 transitions. [2021-06-06 00:08:23,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:08:23,924 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:23,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:23,927 INFO L225 Difference]: With dead ends: 2194 [2021-06-06 00:08:23,927 INFO L226 Difference]: Without dead ends: 2149 [2021-06-06 00:08:23,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 5164.8ms TimeCoverageRelationStatistics Valid=352, Invalid=2000, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:08:23,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-06 00:08:23,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1416. [2021-06-06 00:08:23,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.311660777385159) internal successors, (4686), 1415 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:23,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4686 transitions. [2021-06-06 00:08:23,947 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4686 transitions. Word has length 26 [2021-06-06 00:08:23,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:23,947 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 4686 transitions. [2021-06-06 00:08:23,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:23,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4686 transitions. [2021-06-06 00:08:23,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:23,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:23,949 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:24,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-06 00:08:24,149 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:24,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:24,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-06-06 00:08:24,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:24,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044211747] [2021-06-06 00:08:24,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:24,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:24,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044211747] [2021-06-06 00:08:24,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044211747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:24,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90537681] [2021-06-06 00:08:24,373 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 [2021-06-06 00:08:24,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:08:24,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:24,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:08:24,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:24,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:24,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:24,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:24,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:08:24,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:24,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:24,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:24,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-06 00:08:24,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:25,077 INFO L628 ElimStorePlain]: treesize reduction 117, result has 42.4 percent of original size [2021-06-06 00:08:25,077 INFO L518 ElimStorePlain]: Eliminatee v_prenex_32 vanished before elimination [2021-06-06 00:08:25,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:25,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:25,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:08:25,083 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:25,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:25,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:25,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:25,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:08:25,120 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:25,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:25,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:08:25,146 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:265, output treesize:24 [2021-06-06 00:08:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:25,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90537681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:25,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:25,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:08:25,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748329288] [2021-06-06 00:08:25,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:08:25,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:25,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:08:25,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:08:25,178 INFO L87 Difference]: Start difference. First operand 1416 states and 4686 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:26,015 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-06 00:08:26,203 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2021-06-06 00:08:26,541 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 51 [2021-06-06 00:08:26,713 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-06-06 00:08:26,976 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2021-06-06 00:08:27,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:27,110 INFO L93 Difference]: Finished difference Result 2242 states and 7148 transitions. [2021-06-06 00:08:27,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:08:27,111 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:27,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:27,114 INFO L225 Difference]: With dead ends: 2242 [2021-06-06 00:08:27,114 INFO L226 Difference]: Without dead ends: 2212 [2021-06-06 00:08:27,114 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2014.9ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:08:27,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-06 00:08:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1446. [2021-06-06 00:08:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.3217993079584773) internal successors, (4800), 1445 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:27,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4800 transitions. [2021-06-06 00:08:27,134 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4800 transitions. Word has length 26 [2021-06-06 00:08:27,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:27,135 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4800 transitions. [2021-06-06 00:08:27,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:27,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4800 transitions. [2021-06-06 00:08:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:27,137 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:27,137 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:27,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:27,337 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:27,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:27,338 INFO L82 PathProgramCache]: Analyzing trace with hash 937111779, now seen corresponding path program 10 times [2021-06-06 00:08:27,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:27,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843744182] [2021-06-06 00:08:27,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:27,507 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-06-06 00:08:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:27,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:27,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843744182] [2021-06-06 00:08:27,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843744182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:27,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154801942] [2021-06-06 00:08:27,766 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 [2021-06-06 00:08:27,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:08:27,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:27,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:08:27,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:28,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:28,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,175 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 30 treesize of output 13 [2021-06-06 00:08:28,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:28,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:28,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-06 00:08:28,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:28,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:28,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,192 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 33 treesize of output 19 [2021-06-06 00:08:28,193 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:28,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:28,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:28,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:28,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:28,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,209 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 28 treesize of output 16 [2021-06-06 00:08:28,210 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:28,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:28,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,216 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 21 treesize of output 13 [2021-06-06 00:08:28,217 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:28,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:28,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,224 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 30 treesize of output 13 [2021-06-06 00:08:28,225 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:28,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:28,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,232 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 28 treesize of output 16 [2021-06-06 00:08:28,233 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:28,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:28,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,240 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 30 treesize of output 16 [2021-06-06 00:08:28,241 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:28,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:28,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,250 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 33 treesize of output 19 [2021-06-06 00:08:28,250 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:28,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:28,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:08:28,257 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:28,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:28,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:28,265 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:28,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:28,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:08:28,271 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:28,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:28,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,276 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 28 treesize of output 16 [2021-06-06 00:08:28,276 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:28,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:28,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:28,279 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 28 treesize of output 16 [2021-06-06 00:08:28,280 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:28,298 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-06 00:08:28,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:08:28,299 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-06 00:08:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:28,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154801942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:28,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:28,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:08:28,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939978360] [2021-06-06 00:08:28,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:08:28,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:28,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:08:28,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:08:28,328 INFO L87 Difference]: Start difference. First operand 1446 states and 4800 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:28,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:28,823 INFO L93 Difference]: Finished difference Result 1751 states and 5745 transitions. [2021-06-06 00:08:28,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:08:28,823 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:28,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:28,826 INFO L225 Difference]: With dead ends: 1751 [2021-06-06 00:08:28,826 INFO L226 Difference]: Without dead ends: 1736 [2021-06-06 00:08:28,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 844.5ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:08:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-06 00:08:28,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1455. [2021-06-06 00:08:28,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 3.3259972489683634) internal successors, (4836), 1454 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:28,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 4836 transitions. [2021-06-06 00:08:28,851 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 4836 transitions. Word has length 26 [2021-06-06 00:08:28,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:28,851 INFO L482 AbstractCegarLoop]: Abstraction has 1455 states and 4836 transitions. [2021-06-06 00:08:28,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:28,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 4836 transitions. [2021-06-06 00:08:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:28,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:28,853 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:29,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:29,054 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:29,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:29,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1130404249, now seen corresponding path program 11 times [2021-06-06 00:08:29,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:29,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125594241] [2021-06-06 00:08:29,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:29,244 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-06-06 00:08:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:29,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:29,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125594241] [2021-06-06 00:08:29,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125594241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:29,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644264147] [2021-06-06 00:08:29,421 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 [2021-06-06 00:08:29,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:08:29,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:29,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:08:29,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:29,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:29,708 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:29,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:29,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:29,716 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:29,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:29,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:29,728 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:29,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:08:29,729 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:29,740 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:29,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:08:29,741 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:29,749 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:29,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:29,750 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:29,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:29,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:08:29,768 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:29,776 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:29,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:29,777 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:29,789 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:29,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-06 00:08:29,790 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:29,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:29,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:08:29,802 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:29,811 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:29,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:08:29,812 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:29,820 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:29,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:29,820 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:29,828 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:29,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:29,829 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:29,837 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:29,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:08:29,837 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:29,853 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:29,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:08:29,853 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:29,864 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:29,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:08:29,866 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:29,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:29,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:08:29,880 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:29,971 INFO L628 ElimStorePlain]: treesize reduction 55, result has 55.6 percent of original size [2021-06-06 00:08:29,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:08:29,972 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:569, output treesize:69 [2021-06-06 00:08:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:30,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644264147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:30,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:30,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:08:30,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451816607] [2021-06-06 00:08:30,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:08:30,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:30,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:08:30,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:08:30,072 INFO L87 Difference]: Start difference. First operand 1455 states and 4836 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:30,679 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-06 00:08:31,512 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-06-06 00:08:31,684 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-06 00:08:32,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:32,207 INFO L93 Difference]: Finished difference Result 2518 states and 8034 transitions. [2021-06-06 00:08:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:08:32,207 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:32,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:32,211 INFO L225 Difference]: With dead ends: 2518 [2021-06-06 00:08:32,211 INFO L226 Difference]: Without dead ends: 2488 [2021-06-06 00:08:32,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 2159.7ms TimeCoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:08:32,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-06-06 00:08:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 1471. [2021-06-06 00:08:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 3.336734693877551) internal successors, (4905), 1470 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 4905 transitions. [2021-06-06 00:08:32,237 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 4905 transitions. Word has length 26 [2021-06-06 00:08:32,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:32,237 INFO L482 AbstractCegarLoop]: Abstraction has 1471 states and 4905 transitions. [2021-06-06 00:08:32,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:32,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 4905 transitions. [2021-06-06 00:08:32,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:32,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:32,240 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:32,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-06-06 00:08:32,440 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:32,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:32,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1060173529, now seen corresponding path program 12 times [2021-06-06 00:08:32,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:32,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412619281] [2021-06-06 00:08:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:32,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:32,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412619281] [2021-06-06 00:08:32,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412619281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:32,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809459541] [2021-06-06 00:08:32,761 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 [2021-06-06 00:08:32,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:08:32,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:32,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:08:32,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:33,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,033 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:33,034 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-06 00:08:33,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:33,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:33,053 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-06-06 00:08:33,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:33,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:33,073 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-06 00:08:33,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:33,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,090 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:33,090 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:08:33,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:33,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,106 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:33,107 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:08:33,107 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:33,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,126 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:33,126 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-06 00:08:33,128 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:33,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,145 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:33,145 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:08:33,146 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:33,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,162 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:33,162 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2021-06-06 00:08:33,164 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:33,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,177 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:33,177 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:08:33,177 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:33,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,188 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:33,188 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:08:33,189 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:33,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,201 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:33,201 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:08:33,202 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:33,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,213 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:33,213 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-06 00:08:33,214 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:33,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:33,228 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-06-06 00:08:33,238 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:33,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,256 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:33,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:08:33,258 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:33,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,270 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:33,270 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2021-06-06 00:08:33,272 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:33,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:33,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:33,280 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:33,280 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:08:33,280 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:33,355 INFO L628 ElimStorePlain]: treesize reduction 46, result has 65.7 percent of original size [2021-06-06 00:08:33,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:08:33,356 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:689, output treesize:88 [2021-06-06 00:08:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:33,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809459541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:33,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:33,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:08:33,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330064801] [2021-06-06 00:08:33,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:08:33,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:33,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:08:33,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:08:33,461 INFO L87 Difference]: Start difference. First operand 1471 states and 4905 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:34,964 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-06-06 00:08:35,299 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-06 00:08:35,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:35,757 INFO L93 Difference]: Finished difference Result 2131 states and 6893 transitions. [2021-06-06 00:08:35,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:08:35,758 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:35,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:35,760 INFO L225 Difference]: With dead ends: 2131 [2021-06-06 00:08:35,760 INFO L226 Difference]: Without dead ends: 2101 [2021-06-06 00:08:35,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2230.7ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:08:35,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2021-06-06 00:08:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 1480. [2021-06-06 00:08:35,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 1479 states have (on average 3.342799188640974) internal successors, (4944), 1479 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:35,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 4944 transitions. [2021-06-06 00:08:35,779 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 4944 transitions. Word has length 26 [2021-06-06 00:08:35,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:35,779 INFO L482 AbstractCegarLoop]: Abstraction has 1480 states and 4944 transitions. [2021-06-06 00:08:35,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:35,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 4944 transitions. [2021-06-06 00:08:35,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:35,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:35,781 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:35,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-06-06 00:08:35,981 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:35,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:35,981 INFO L82 PathProgramCache]: Analyzing trace with hash -165503173, now seen corresponding path program 13 times [2021-06-06 00:08:35,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:35,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758523616] [2021-06-06 00:08:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:36,329 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-06-06 00:08:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:36,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:36,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758523616] [2021-06-06 00:08:36,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758523616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:36,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867872348] [2021-06-06 00:08:36,479 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 [2021-06-06 00:08:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:36,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:08:36,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:36,882 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_36], 2=[A, v_prenex_34]} [2021-06-06 00:08:36,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:36,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:08:36,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:36,993 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-06 00:08:36,993 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-06-06 00:08:36,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:36,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:36,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:08:36,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:37,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:37,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:37,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:08:37,026 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:37,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:37,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:08:37,047 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:15 [2021-06-06 00:08:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:37,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867872348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:37,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:37,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:08:37,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899965792] [2021-06-06 00:08:37,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:08:37,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:37,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:08:37,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:08:37,075 INFO L87 Difference]: Start difference. First operand 1480 states and 4944 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:37,966 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-06 00:08:38,146 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-06-06 00:08:38,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:38,469 INFO L93 Difference]: Finished difference Result 2125 states and 6803 transitions. [2021-06-06 00:08:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:08:38,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:38,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:38,472 INFO L225 Difference]: With dead ends: 2125 [2021-06-06 00:08:38,472 INFO L226 Difference]: Without dead ends: 2110 [2021-06-06 00:08:38,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1599.6ms TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:08:38,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-06-06 00:08:38,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1482. [2021-06-06 00:08:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1481 states have (on average 3.3430114787305873) internal successors, (4951), 1481 states have internal predecessors, (4951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 4951 transitions. [2021-06-06 00:08:38,501 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 4951 transitions. Word has length 26 [2021-06-06 00:08:38,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:38,501 INFO L482 AbstractCegarLoop]: Abstraction has 1482 states and 4951 transitions. [2021-06-06 00:08:38,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:38,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 4951 transitions. [2021-06-06 00:08:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:38,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:38,504 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:08:38,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable688 [2021-06-06 00:08:38,705 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:38,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:38,705 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-06-06 00:08:38,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:38,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608428434] [2021-06-06 00:08:38,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:39,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:39,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608428434] [2021-06-06 00:08:39,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608428434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:39,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708422828] [2021-06-06 00:08:39,033 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 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 [2021-06-06 00:08:39,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:08:39,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:39,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:08:39,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:39,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,732 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 39 treesize of output 16 [2021-06-06 00:08:39,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,741 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 30 treesize of output 16 [2021-06-06 00:08:39,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,751 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 30 treesize of output 16 [2021-06-06 00:08:39,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,760 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 35 treesize of output 19 [2021-06-06 00:08:39,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,770 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 37 treesize of output 19 [2021-06-06 00:08:39,770 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:08:39,780 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,788 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 33 treesize of output 13 [2021-06-06 00:08:39,790 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,798 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 28 treesize of output 13 [2021-06-06 00:08:39,799 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,808 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 28 treesize of output 13 [2021-06-06 00:08:39,809 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,817 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 39 treesize of output 19 [2021-06-06 00:08:39,818 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,826 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 39 treesize of output 13 [2021-06-06 00:08:39,827 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,835 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 34 treesize of output 16 [2021-06-06 00:08:39,836 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,845 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 41 treesize of output 16 [2021-06-06 00:08:39,845 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,853 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 32 treesize of output 16 [2021-06-06 00:08:39,854 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:39,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:08:39,858 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-06 00:08:39,860 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:39,881 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-06 00:08:39,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:08:39,883 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-06 00:08:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:39,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708422828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:39,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:39,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-06 00:08:39,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572923125] [2021-06-06 00:08:39,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:08:39,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:39,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:08:39,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:08:39,914 INFO L87 Difference]: Start difference. First operand 1482 states and 4951 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:40,642 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-06 00:08:41,090 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-06 00:08:41,755 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-06 00:08:43,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:43,125 INFO L93 Difference]: Finished difference Result 3327 states and 10302 transitions. [2021-06-06 00:08:43,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:08:43,125 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:43,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:43,129 INFO L225 Difference]: With dead ends: 3327 [2021-06-06 00:08:43,129 INFO L226 Difference]: Without dead ends: 3282 [2021-06-06 00:08:43,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 2931.9ms TimeCoverageRelationStatistics Valid=670, Invalid=3362, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:08:43,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2021-06-06 00:08:43,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 1496. [2021-06-06 00:08:43,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.3545150501672243) internal successors, (5015), 1495 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:43,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5015 transitions. [2021-06-06 00:08:43,154 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5015 transitions. Word has length 26 [2021-06-06 00:08:43,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:43,154 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 5015 transitions. [2021-06-06 00:08:43,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:43,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5015 transitions. [2021-06-06 00:08:43,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:43,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:43,156 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, 1, 1, 1] [2021-06-06 00:08:43,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable699 [2021-06-06 00:08:43,357 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:43,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:43,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1424367203, now seen corresponding path program 14 times [2021-06-06 00:08:43,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:43,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819922233] [2021-06-06 00:08:43,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:43,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:43,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819922233] [2021-06-06 00:08:43,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819922233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:43,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523863415] [2021-06-06 00:08:43,793 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 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 [2021-06-06 00:08:43,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:08:43,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:43,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:08:43,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:44,094 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-06-06 00:08:44,720 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:08:44,720 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 28 treesize of output 16 [2021-06-06 00:08:44,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:45,147 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 149 [2021-06-06 00:08:45,148 INFO L628 ElimStorePlain]: treesize reduction 201, result has 67.0 percent of original size [2021-06-06 00:08:45,170 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:08:45,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:08:45,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:45,323 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-06 00:08:45,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:45,324 INFO L518 ElimStorePlain]: Eliminatee v_prenex_82 vanished before elimination [2021-06-06 00:08:45,349 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:08:45,349 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 28 [2021-06-06 00:08:45,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:45,498 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-06-06 00:08:45,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:45,520 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:08:45,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 21 [2021-06-06 00:08:45,522 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:45,668 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-06 00:08:45,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:45,691 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:08:45,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:08:45,692 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:45,836 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-06-06 00:08:45,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:45,860 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:08:45,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-06 00:08:45,864 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,006 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-06 00:08:46,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:46,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:46,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-06 00:08:46,027 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,169 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-06 00:08:46,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:46,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:46,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-06 00:08:46,190 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,336 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-06 00:08:46,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:46,358 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:08:46,358 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 30 treesize of output 28 [2021-06-06 00:08:46,361 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,501 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-06 00:08:46,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:46,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:46,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-06 00:08:46,522 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,671 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-06 00:08:46,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:46,689 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:08:46,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 25 [2021-06-06 00:08:46,694 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:46,825 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-06 00:08:46,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:46,826 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-06-06 00:08:46,826 INFO L518 ElimStorePlain]: Eliminatee v_prenex_66 vanished before elimination [2021-06-06 00:08:46,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 14 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-06 00:08:46,840 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 28 variables, input treesize:631, output treesize:455 [2021-06-06 00:08:47,069 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2021-06-06 00:08:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:47,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523863415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:47,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:47,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:08:47,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092764952] [2021-06-06 00:08:47,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:08:47,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:47,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:08:47,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:08:47,236 INFO L87 Difference]: Start difference. First operand 1496 states and 5015 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:47,699 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-06-06 00:08:48,176 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2021-06-06 00:08:48,470 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-06-06 00:08:48,633 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-06-06 00:08:49,095 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-06-06 00:08:49,550 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-06 00:08:50,077 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-06-06 00:08:50,513 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-06 00:08:51,085 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2021-06-06 00:08:51,715 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 73 [2021-06-06 00:08:51,993 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-06-06 00:08:52,207 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-06-06 00:08:52,581 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 46 [2021-06-06 00:08:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:08:52,894 INFO L93 Difference]: Finished difference Result 2583 states and 8123 transitions. [2021-06-06 00:08:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:08:52,894 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:08:52,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:08:52,898 INFO L225 Difference]: With dead ends: 2583 [2021-06-06 00:08:52,898 INFO L226 Difference]: Without dead ends: 2553 [2021-06-06 00:08:52,898 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 5996.8ms TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:08:52,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-06 00:08:52,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1496. [2021-06-06 00:08:52,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.3531772575250836) internal successors, (5013), 1495 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:52,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5013 transitions. [2021-06-06 00:08:52,920 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5013 transitions. Word has length 26 [2021-06-06 00:08:52,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:08:52,920 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 5013 transitions. [2021-06-06 00:08:52,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:52,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5013 transitions. [2021-06-06 00:08:52,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:08:52,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:08:52,922 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, 1, 1, 1] [2021-06-06 00:08:53,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:08:53,123 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:08:53,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:08:53,123 INFO L82 PathProgramCache]: Analyzing trace with hash 39724387, now seen corresponding path program 15 times [2021-06-06 00:08:53,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:08:53,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276818815] [2021-06-06 00:08:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:08:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:08:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:53,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:08:53,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276818815] [2021-06-06 00:08:53,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276818815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:53,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250650417] [2021-06-06 00:08:53,508 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 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 [2021-06-06 00:08:53,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:08:53,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:08:53,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:08:53,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:08:53,810 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-06-06 00:08:54,055 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-06 00:08:54,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:54,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-06 00:08:54,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:54,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-06 00:08:54,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,519 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 121 [2021-06-06 00:08:54,520 INFO L628 ElimStorePlain]: treesize reduction 148, result has 71.5 percent of original size [2021-06-06 00:08:54,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:54,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:08:54,537 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,667 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-06 00:08:54,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:54,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,680 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:54,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:08:54,682 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,831 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-06 00:08:54,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:54,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,844 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:54,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:08:54,846 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:54,970 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-06 00:08:54,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:54,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:54,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:54,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:08:54,985 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:55,102 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-06 00:08:55,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:55,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:55,114 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:08:55,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:08:55,116 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:55,231 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-06 00:08:55,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:55,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:55,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:55,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:08:55,247 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:55,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:55,256 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:08:55,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:08:55,257 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:55,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:55,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:08:55,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:55,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:08:55,366 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:08:55,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:08:55,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:08:55,460 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:563, output treesize:158 [2021-06-06 00:08:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:08:55,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250650417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:08:55,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:08:55,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-06 00:08:55,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698534378] [2021-06-06 00:08:55,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:08:55,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:08:55,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:08:55,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:08:55,615 INFO L87 Difference]: Start difference. First operand 1496 states and 5013 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:08:56,207 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-06-06 00:08:56,766 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-06-06 00:08:57,272 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-06 00:08:57,684 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-06-06 00:08:58,021 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-06 00:08:58,590 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-06 00:08:59,000 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 64 [2021-06-06 00:08:59,501 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 73 [2021-06-06 00:09:00,028 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-06-06 00:09:00,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:00,149 INFO L93 Difference]: Finished difference Result 2835 states and 8886 transitions. [2021-06-06 00:09:00,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:09:00,149 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:00,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:00,153 INFO L225 Difference]: With dead ends: 2835 [2021-06-06 00:09:00,153 INFO L226 Difference]: Without dead ends: 2805 [2021-06-06 00:09:00,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 4656.9ms TimeCoverageRelationStatistics Valid=392, Invalid=1588, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:09:00,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2021-06-06 00:09:00,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 1506. [2021-06-06 00:09:00,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.359468438538206) internal successors, (5056), 1505 states have internal predecessors, (5056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:00,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5056 transitions. [2021-06-06 00:09:00,179 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5056 transitions. Word has length 26 [2021-06-06 00:09:00,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:00,179 INFO L482 AbstractCegarLoop]: Abstraction has 1506 states and 5056 transitions. [2021-06-06 00:09:00,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:00,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5056 transitions. [2021-06-06 00:09:00,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:00,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:00,181 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:00,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable839,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:00,382 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:00,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:00,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-06-06 00:09:00,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:00,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519892256] [2021-06-06 00:09:00,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:00,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:00,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519892256] [2021-06-06 00:09:00,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519892256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:00,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328437381] [2021-06-06 00:09:00,690 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 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 [2021-06-06 00:09:00,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:09:00,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:00,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:09:00,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:01,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,249 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 37 treesize of output 19 [2021-06-06 00:09:01,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:01,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,257 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 28 treesize of output 13 [2021-06-06 00:09:01,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:01,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,265 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 41 treesize of output 16 [2021-06-06 00:09:01,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:01,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,277 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 30 treesize of output 16 [2021-06-06 00:09:01,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:01,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,288 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 39 treesize of output 16 [2021-06-06 00:09:01,289 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:01,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,299 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 41 treesize of output 13 [2021-06-06 00:09:01,300 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:01,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,310 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 28 treesize of output 13 [2021-06-06 00:09:01,311 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:01,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,320 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 39 treesize of output 19 [2021-06-06 00:09:01,320 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:01,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,330 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:09:01,331 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:01,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,341 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 32 treesize of output 16 [2021-06-06 00:09:01,342 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:01,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,350 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 39 treesize of output 13 [2021-06-06 00:09:01,351 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:01,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,359 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-06 00:09:01,360 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:01,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,367 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 35 treesize of output 19 [2021-06-06 00:09:01,368 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:01,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,374 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-06 00:09:01,375 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:01,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:01,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:01,379 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 35 treesize of output 19 [2021-06-06 00:09:01,379 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:01,399 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-06 00:09:01,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:09:01,400 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-06 00:09:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:01,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328437381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:01,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:01,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-06 00:09:01,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903578840] [2021-06-06 00:09:01,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:09:01,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:01,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:09:01,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:09:01,432 INFO L87 Difference]: Start difference. First operand 1506 states and 5056 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:01,913 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-06-06 00:09:02,294 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-06-06 00:09:02,809 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-06 00:09:03,256 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-06-06 00:09:04,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:04,437 INFO L93 Difference]: Finished difference Result 2978 states and 9427 transitions. [2021-06-06 00:09:04,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:09:04,438 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:04,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:04,442 INFO L225 Difference]: With dead ends: 2978 [2021-06-06 00:09:04,442 INFO L226 Difference]: Without dead ends: 2933 [2021-06-06 00:09:04,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 2660.8ms TimeCoverageRelationStatistics Valid=591, Invalid=2715, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:09:04,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2021-06-06 00:09:04,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 1506. [2021-06-06 00:09:04,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.3601328903654486) internal successors, (5057), 1505 states have internal predecessors, (5057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:04,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5057 transitions. [2021-06-06 00:09:04,476 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5057 transitions. Word has length 26 [2021-06-06 00:09:04,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:04,476 INFO L482 AbstractCegarLoop]: Abstraction has 1506 states and 5057 transitions. [2021-06-06 00:09:04,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:04,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5057 transitions. [2021-06-06 00:09:04,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:04,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:04,478 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:04,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:04,693 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:04,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:04,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-06-06 00:09:04,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:04,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292698124] [2021-06-06 00:09:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:05,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:05,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292698124] [2021-06-06 00:09:05,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292698124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:05,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999390083] [2021-06-06 00:09:05,000 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 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 [2021-06-06 00:09:05,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:09:05,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:05,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:09:05,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:05,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,540 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:09:05,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-06 00:09:05,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,561 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:05,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:09:05,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:05,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-06 00:09:05,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,610 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:05,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:09:05,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,645 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-06 00:09:05,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-06 00:09:05,647 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,672 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:09:05,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-06-06 00:09:05,674 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,700 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-06-06 00:09:05,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-06-06 00:09:05,701 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,726 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-06 00:09:05,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-06-06 00:09:05,727 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,752 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-06 00:09:05,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-06 00:09:05,754 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,778 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-06 00:09:05,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 25 [2021-06-06 00:09:05,780 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,796 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:05,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:09:05,797 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,812 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:05,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-06 00:09:05,813 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,827 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:05,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:09:05,828 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,848 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:05,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:09:05,850 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,865 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:05,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:09:05,866 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:05,876 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:09:05,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:09:05,877 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:05,964 INFO L628 ElimStorePlain]: treesize reduction 66, result has 58.5 percent of original size [2021-06-06 00:09:05,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:09:05,966 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-06-06 00:09:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:06,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999390083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:06,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:06,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-06 00:09:06,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782275677] [2021-06-06 00:09:06,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:09:06,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:06,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:09:06,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:09:06,048 INFO L87 Difference]: Start difference. First operand 1506 states and 5057 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:06,891 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-06-06 00:09:07,445 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-06 00:09:08,043 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-06-06 00:09:08,752 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-06-06 00:09:08,953 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-06 00:09:09,084 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-06-06 00:09:09,278 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-06-06 00:09:09,462 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2021-06-06 00:09:09,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:09,855 INFO L93 Difference]: Finished difference Result 3558 states and 11107 transitions. [2021-06-06 00:09:09,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:09:09,855 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:09,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:09,860 INFO L225 Difference]: With dead ends: 3558 [2021-06-06 00:09:09,860 INFO L226 Difference]: Without dead ends: 3498 [2021-06-06 00:09:09,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 3440.8ms TimeCoverageRelationStatistics Valid=813, Invalid=3347, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:09:09,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2021-06-06 00:09:09,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 1522. [2021-06-06 00:09:09,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.3721236028928336) internal successors, (5129), 1521 states have internal predecessors, (5129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:09,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5129 transitions. [2021-06-06 00:09:09,889 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5129 transitions. Word has length 26 [2021-06-06 00:09:09,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:09,890 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 5129 transitions. [2021-06-06 00:09:09,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:09,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5129 transitions. [2021-06-06 00:09:09,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:09,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:09,892 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:10,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-06-06 00:09:10,092 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:10,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:10,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 16 times [2021-06-06 00:09:10,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:10,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10716852] [2021-06-06 00:09:10,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:10,382 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-06-06 00:09:10,498 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-06 00:09:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:10,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:10,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10716852] [2021-06-06 00:09:10,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10716852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:10,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135358696] [2021-06-06 00:09:10,654 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 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 [2021-06-06 00:09:10,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:09:10,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:10,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:09:10,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:11,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,077 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 33 treesize of output 19 [2021-06-06 00:09:11,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,083 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 21 treesize of output 13 [2021-06-06 00:09:11,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,089 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 33 treesize of output 19 [2021-06-06 00:09:11,090 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:09:11,096 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,101 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 26 treesize of output 13 [2021-06-06 00:09:11,102 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,108 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 28 treesize of output 16 [2021-06-06 00:09:11,108 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,114 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 28 treesize of output 16 [2021-06-06 00:09:11,114 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,120 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 33 treesize of output 19 [2021-06-06 00:09:11,121 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,128 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 28 treesize of output 16 [2021-06-06 00:09:11,129 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:11,138 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,144 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 30 treesize of output 13 [2021-06-06 00:09:11,145 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:09:11,151 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,156 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 21 treesize of output 13 [2021-06-06 00:09:11,157 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:11,162 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:11,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:11,165 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 30 treesize of output 13 [2021-06-06 00:09:11,166 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:11,186 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-06 00:09:11,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:09:11,187 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-06 00:09:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:11,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135358696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:11,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:11,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:09:11,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511898329] [2021-06-06 00:09:11,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:09:11,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:11,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:09:11,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:09:11,211 INFO L87 Difference]: Start difference. First operand 1522 states and 5129 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:11,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:11,963 INFO L93 Difference]: Finished difference Result 1905 states and 6288 transitions. [2021-06-06 00:09:11,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:09:11,963 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:11,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:11,966 INFO L225 Difference]: With dead ends: 1905 [2021-06-06 00:09:11,966 INFO L226 Difference]: Without dead ends: 1890 [2021-06-06 00:09:11,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1187.8ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:09:11,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-06-06 00:09:11,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1530. [2021-06-06 00:09:11,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1529 states have (on average 3.368214519293656) internal successors, (5150), 1529 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:11,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 5150 transitions. [2021-06-06 00:09:11,989 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 5150 transitions. Word has length 26 [2021-06-06 00:09:11,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:11,989 INFO L482 AbstractCegarLoop]: Abstraction has 1530 states and 5150 transitions. [2021-06-06 00:09:11,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:11,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 5150 transitions. [2021-06-06 00:09:11,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:11,992 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:11,992 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:12,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1070,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:12,192 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:12,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:12,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1807218181, now seen corresponding path program 17 times [2021-06-06 00:09:12,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:12,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586739130] [2021-06-06 00:09:12,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:12,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:12,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586739130] [2021-06-06 00:09:12,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586739130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:12,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71235225] [2021-06-06 00:09:12,487 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 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 [2021-06-06 00:09:12,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:09:12,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:12,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:09:12,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:13,163 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-06-06 00:09:13,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:13,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:13,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:13,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:13,450 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-06-06 00:09:13,451 INFO L628 ElimStorePlain]: treesize reduction 55, result has 71.1 percent of original size [2021-06-06 00:09:13,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:13,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:09:13,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:13,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:13,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:13,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:09:13,466 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:13,567 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-06 00:09:13,568 INFO L628 ElimStorePlain]: treesize reduction 20, result has 80.2 percent of original size [2021-06-06 00:09:13,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:13,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:13,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:09:13,573 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:13,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:13,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:09:13,602 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:211, output treesize:25 [2021-06-06 00:09:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:13,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71235225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:13,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:13,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:09:13,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263467123] [2021-06-06 00:09:13,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:09:13,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:13,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:09:13,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:09:13,645 INFO L87 Difference]: Start difference. First operand 1530 states and 5150 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:14,432 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-06-06 00:09:14,791 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 77 [2021-06-06 00:09:15,086 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2021-06-06 00:09:15,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:15,361 INFO L93 Difference]: Finished difference Result 2016 states and 6558 transitions. [2021-06-06 00:09:15,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:09:15,361 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:15,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:15,364 INFO L225 Difference]: With dead ends: 2016 [2021-06-06 00:09:15,364 INFO L226 Difference]: Without dead ends: 1971 [2021-06-06 00:09:15,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2035.2ms TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:09:15,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-06-06 00:09:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1522. [2021-06-06 00:09:15,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.3721236028928336) internal successors, (5129), 1521 states have internal predecessors, (5129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:15,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5129 transitions. [2021-06-06 00:09:15,395 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5129 transitions. Word has length 26 [2021-06-06 00:09:15,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:15,395 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 5129 transitions. [2021-06-06 00:09:15,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:15,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5129 transitions. [2021-06-06 00:09:15,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:15,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:15,398 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:15,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1112 [2021-06-06 00:09:15,613 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:15,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:15,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1195907103, now seen corresponding path program 18 times [2021-06-06 00:09:15,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:15,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502234106] [2021-06-06 00:09:15,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:15,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:15,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502234106] [2021-06-06 00:09:15,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502234106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:15,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764952680] [2021-06-06 00:09:15,915 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 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 [2021-06-06 00:09:15,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:09:15,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:15,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:09:15,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:16,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,285 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:16,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:16,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:16,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:09:16,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,314 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:16,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:16,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,324 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:16,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:16,325 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,335 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:16,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:09:16,336 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,344 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:16,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:16,345 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,353 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:16,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:16,354 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,363 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:16,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:16,364 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,376 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:16,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:09:16,378 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,389 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:16,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:09:16,390 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,400 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:16,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:09:16,401 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,409 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:16,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:09:16,410 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,419 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:16,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:16,419 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,427 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:16,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:16,428 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:16,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:09:16,442 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:16,448 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:16,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:09:16,448 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:16,522 INFO L628 ElimStorePlain]: treesize reduction 16, result has 83.5 percent of original size [2021-06-06 00:09:16,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:09:16,525 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:71 [2021-06-06 00:09:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:16,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764952680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:16,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:16,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-06 00:09:16,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251792048] [2021-06-06 00:09:16,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:09:16,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:16,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:09:16,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:09:16,613 INFO L87 Difference]: Start difference. First operand 1522 states and 5129 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:17,169 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-06 00:09:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:17,782 INFO L93 Difference]: Finished difference Result 1999 states and 6574 transitions. [2021-06-06 00:09:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:09:17,783 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:17,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:17,785 INFO L225 Difference]: With dead ends: 1999 [2021-06-06 00:09:17,785 INFO L226 Difference]: Without dead ends: 1984 [2021-06-06 00:09:17,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1218.1ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:09:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-06-06 00:09:17,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1516. [2021-06-06 00:09:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.3716171617161717) internal successors, (5108), 1515 states have internal predecessors, (5108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:17,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 5108 transitions. [2021-06-06 00:09:17,805 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 5108 transitions. Word has length 26 [2021-06-06 00:09:17,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:17,805 INFO L482 AbstractCegarLoop]: Abstraction has 1516 states and 5108 transitions. [2021-06-06 00:09:17,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:17,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 5108 transitions. [2021-06-06 00:09:17,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:17,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:17,807 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:18,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1135 [2021-06-06 00:09:18,007 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:18,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:18,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1432729289, now seen corresponding path program 19 times [2021-06-06 00:09:18,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:18,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60568266] [2021-06-06 00:09:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:18,205 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-06-06 00:09:18,329 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2021-06-06 00:09:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:18,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:18,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60568266] [2021-06-06 00:09:18,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60568266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:18,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29520501] [2021-06-06 00:09:18,537 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 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 [2021-06-06 00:09:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:18,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:09:18,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:18,838 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-06-06 00:09:19,036 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 46 [2021-06-06 00:09:19,128 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_133], 2=[A, v_prenex_132]} [2021-06-06 00:09:19,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:19,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:09:19,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:19,247 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-06 00:09:19,247 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-06-06 00:09:19,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:19,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:19,251 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 23 treesize of output 13 [2021-06-06 00:09:19,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:19,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:19,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:19,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:09:19,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:19,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:19,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:19,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:09:19,299 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:19,370 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-06-06 00:09:19,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:09:19,372 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:25 [2021-06-06 00:09:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:19,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29520501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:19,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:19,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:09:19,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084732559] [2021-06-06 00:09:19,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:09:19,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:19,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:09:19,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:09:19,408 INFO L87 Difference]: Start difference. First operand 1516 states and 5108 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:20,244 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-06 00:09:20,584 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-06 00:09:20,757 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-06-06 00:09:20,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:20,841 INFO L93 Difference]: Finished difference Result 2061 states and 6772 transitions. [2021-06-06 00:09:20,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:09:20,842 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:20,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:20,844 INFO L225 Difference]: With dead ends: 2061 [2021-06-06 00:09:20,845 INFO L226 Difference]: Without dead ends: 2046 [2021-06-06 00:09:20,845 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2008.0ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:09:20,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-06 00:09:20,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1517. [2021-06-06 00:09:20,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.3726912928759893) internal successors, (5113), 1516 states have internal predecessors, (5113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:20,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 5113 transitions. [2021-06-06 00:09:20,864 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 5113 transitions. Word has length 26 [2021-06-06 00:09:20,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:20,865 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 5113 transitions. [2021-06-06 00:09:20,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 5113 transitions. [2021-06-06 00:09:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:20,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:20,867 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:21,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1184,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:21,067 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:21,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:21,068 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 20 times [2021-06-06 00:09:21,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:21,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787863613] [2021-06-06 00:09:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:21,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:21,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787863613] [2021-06-06 00:09:21,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787863613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:21,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164274646] [2021-06-06 00:09:21,305 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 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 [2021-06-06 00:09:21,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:09:21,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:21,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:09:21,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:22,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:22,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:22,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-06 00:09:22,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:22,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:22,165 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:09:22,166 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 30 treesize of output 24 [2021-06-06 00:09:22,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:22,294 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-06 00:09:22,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:22,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:22,317 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:22,317 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 28 [2021-06-06 00:09:22,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:22,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:22,338 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:22,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 25 [2021-06-06 00:09:22,341 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:22,462 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-06 00:09:22,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:22,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:22,484 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:22,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-06 00:09:22,485 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:22,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:22,503 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:22,503 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 30 treesize of output 28 [2021-06-06 00:09:22,505 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:22,618 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-06 00:09:22,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:22,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:22,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:22,635 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 16 treesize of output 26 [2021-06-06 00:09:22,641 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:22,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:22,656 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:09:22,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 21 [2021-06-06 00:09:22,658 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:22,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:22,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:09:22,772 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:329, output treesize:224 [2021-06-06 00:09:22,959 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-06-06 00:09:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:22,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164274646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:22,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:22,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:09:22,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297227498] [2021-06-06 00:09:22,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:09:22,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:22,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:09:22,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:09:22,992 INFO L87 Difference]: Start difference. First operand 1517 states and 5113 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:23,977 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2021-06-06 00:09:24,700 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-06-06 00:09:24,887 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-06 00:09:25,012 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-06 00:09:25,175 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-06-06 00:09:25,353 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-06 00:09:25,551 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-06 00:09:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:25,739 INFO L93 Difference]: Finished difference Result 2205 states and 7070 transitions. [2021-06-06 00:09:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:09:25,740 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:25,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:25,743 INFO L225 Difference]: With dead ends: 2205 [2021-06-06 00:09:25,743 INFO L226 Difference]: Without dead ends: 2165 [2021-06-06 00:09:25,743 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 3026.3ms TimeCoverageRelationStatistics Valid=350, Invalid=1906, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:09:25,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2021-06-06 00:09:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 1566. [2021-06-06 00:09:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.3686900958466452) internal successors, (5272), 1565 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:25,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5272 transitions. [2021-06-06 00:09:25,766 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5272 transitions. Word has length 26 [2021-06-06 00:09:25,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:25,766 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 5272 transitions. [2021-06-06 00:09:25,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:25,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5272 transitions. [2021-06-06 00:09:25,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:25,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:25,770 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, 1, 1, 1] [2021-06-06 00:09:25,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:25,972 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:25,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:25,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1409101781, now seen corresponding path program 21 times [2021-06-06 00:09:25,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:25,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303940267] [2021-06-06 00:09:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:26,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:26,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303940267] [2021-06-06 00:09:26,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303940267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:26,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068869859] [2021-06-06 00:09:26,211 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 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 [2021-06-06 00:09:26,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:09:26,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:26,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:09:26,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:26,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:26,524 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 30 treesize of output 32 [2021-06-06 00:09:26,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:26,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-06 00:09:26,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,559 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:09:26,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:26,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,569 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:09:26,569 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 28 treesize of output 16 [2021-06-06 00:09:26,570 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,578 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:09:26,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:26,579 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,588 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:09:26,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:26,589 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,598 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:09:26,598 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 33 treesize of output 19 [2021-06-06 00:09:26,599 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,619 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:26,619 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 25 [2021-06-06 00:09:26,622 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,642 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:26,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-06 00:09:26,645 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,662 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:09:26,663 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 30 treesize of output 24 [2021-06-06 00:09:26,664 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,673 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:09:26,673 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 33 treesize of output 19 [2021-06-06 00:09:26,674 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,684 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:09:26,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-06-06 00:09:26,684 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,694 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:09:26,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:09:26,695 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,703 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:09:26,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:26,704 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,719 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:09:26,720 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 21 [2021-06-06 00:09:26,721 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,727 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:09:26,727 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 33 treesize of output 19 [2021-06-06 00:09:26,728 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:26,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:26,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-06 00:09:26,791 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:729, output treesize:157 [2021-06-06 00:09:26,942 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-06-06 00:09:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:27,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068869859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:27,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:27,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-06 00:09:27,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357820475] [2021-06-06 00:09:27,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:09:27,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:27,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:09:27,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:09:27,101 INFO L87 Difference]: Start difference. First operand 1566 states and 5272 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:27,903 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-06 00:09:28,032 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-06-06 00:09:28,615 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-06 00:09:28,820 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-06-06 00:09:29,214 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-06-06 00:09:29,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:29,391 INFO L93 Difference]: Finished difference Result 2352 states and 7640 transitions. [2021-06-06 00:09:29,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:09:29,392 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:29,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:29,395 INFO L225 Difference]: With dead ends: 2352 [2021-06-06 00:09:29,395 INFO L226 Difference]: Without dead ends: 2327 [2021-06-06 00:09:29,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2387.1ms TimeCoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:09:29,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2021-06-06 00:09:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 1537. [2021-06-06 00:09:29,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.373046875) internal successors, (5181), 1536 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 5181 transitions. [2021-06-06 00:09:29,418 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 5181 transitions. Word has length 26 [2021-06-06 00:09:29,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:29,419 INFO L482 AbstractCegarLoop]: Abstraction has 1537 states and 5181 transitions. [2021-06-06 00:09:29,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 5181 transitions. [2021-06-06 00:09:29,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:29,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:29,421 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, 1, 1, 1] [2021-06-06 00:09:29,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1258 [2021-06-06 00:09:29,621 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:29,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:29,622 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 22 times [2021-06-06 00:09:29,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:29,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024420704] [2021-06-06 00:09:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:29,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:29,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024420704] [2021-06-06 00:09:29,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024420704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:29,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978313392] [2021-06-06 00:09:29,838 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 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 [2021-06-06 00:09:29,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:09:29,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:29,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:09:29,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:30,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:30,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:30,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:30,125 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 30 treesize of output 13 [2021-06-06 00:09:30,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:30,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:30,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:30,130 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 30 treesize of output 16 [2021-06-06 00:09:30,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:30,202 INFO L628 ElimStorePlain]: treesize reduction 108, result has 42.2 percent of original size [2021-06-06 00:09:30,203 INFO L518 ElimStorePlain]: Eliminatee v_prenex_151 vanished before elimination [2021-06-06 00:09:30,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:30,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:30,206 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 21 treesize of output 13 [2021-06-06 00:09:30,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:30,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:30,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:09:30,232 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:30,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:30,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:09:30,253 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:244, output treesize:24 [2021-06-06 00:09:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:30,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978313392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:30,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:30,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:09:30,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456587924] [2021-06-06 00:09:30,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:09:30,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:30,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:09:30,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:09:30,288 INFO L87 Difference]: Start difference. First operand 1537 states and 5181 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:30,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:30,620 INFO L93 Difference]: Finished difference Result 1678 states and 5570 transitions. [2021-06-06 00:09:30,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:09:30,620 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:30,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:30,623 INFO L225 Difference]: With dead ends: 1678 [2021-06-06 00:09:30,623 INFO L226 Difference]: Without dead ends: 1663 [2021-06-06 00:09:30,623 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 434.6ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:09:30,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-06-06 00:09:30,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1561. [2021-06-06 00:09:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 3.3705128205128205) internal successors, (5258), 1560 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 5258 transitions. [2021-06-06 00:09:30,640 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 5258 transitions. Word has length 26 [2021-06-06 00:09:30,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:30,640 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 5258 transitions. [2021-06-06 00:09:30,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:30,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 5258 transitions. [2021-06-06 00:09:30,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:30,642 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:30,642 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, 1, 1, 1] [2021-06-06 00:09:30,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1314,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:30,842 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:30,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:30,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1766954001, now seen corresponding path program 23 times [2021-06-06 00:09:30,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:30,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608009655] [2021-06-06 00:09:30,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:31,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:31,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608009655] [2021-06-06 00:09:31,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608009655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:31,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564216265] [2021-06-06 00:09:31,100 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 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 [2021-06-06 00:09:31,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:09:31,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:31,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:09:31,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:31,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,401 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:31,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:31,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,411 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:31,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:31,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,424 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:31,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:09:31,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,438 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:31,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:09:31,440 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,450 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:31,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:31,451 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:31,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:09:31,465 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,475 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:31,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:31,476 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,490 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:31,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-06 00:09:31,491 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:31,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:09:31,506 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,517 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:31,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:09:31,518 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,527 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:31,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:31,528 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,538 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:31,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:31,539 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,548 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:31,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:31,549 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,566 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:31,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:31,567 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,577 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:31,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:09:31,578 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:31,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:31,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:09:31,590 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:31,675 INFO L628 ElimStorePlain]: treesize reduction 55, result has 55.6 percent of original size [2021-06-06 00:09:31,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:09:31,676 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:569, output treesize:69 [2021-06-06 00:09:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:31,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564216265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:31,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:31,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:09:31,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525784761] [2021-06-06 00:09:31,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:09:31,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:31,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:09:31,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:09:31,799 INFO L87 Difference]: Start difference. First operand 1561 states and 5258 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:32,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:32,678 INFO L93 Difference]: Finished difference Result 2101 states and 6894 transitions. [2021-06-06 00:09:32,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:09:32,678 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:32,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:32,681 INFO L225 Difference]: With dead ends: 2101 [2021-06-06 00:09:32,681 INFO L226 Difference]: Without dead ends: 2076 [2021-06-06 00:09:32,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1023.4ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:09:32,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-06-06 00:09:32,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1550. [2021-06-06 00:09:32,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.378954163976759) internal successors, (5234), 1549 states have internal predecessors, (5234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:32,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5234 transitions. [2021-06-06 00:09:32,702 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5234 transitions. Word has length 26 [2021-06-06 00:09:32,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:32,702 INFO L482 AbstractCegarLoop]: Abstraction has 1550 states and 5234 transitions. [2021-06-06 00:09:32,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:32,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5234 transitions. [2021-06-06 00:09:32,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:32,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:32,704 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, 1, 1, 1] [2021-06-06 00:09:32,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1328,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:32,904 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:32,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:32,904 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 24 times [2021-06-06 00:09:32,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:32,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422675438] [2021-06-06 00:09:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:33,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:33,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422675438] [2021-06-06 00:09:33,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422675438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:33,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898287437] [2021-06-06 00:09:33,325 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 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 [2021-06-06 00:09:33,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:09:33,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:33,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:09:33,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:33,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:33,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:33,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:09:33,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:33,610 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:33,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:09:33,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:33,619 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:33,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:33,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:33,633 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:33,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:33,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:33,645 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:33,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-06-06 00:09:33,646 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:33,654 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:33,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:33,656 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:33,666 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:33,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:09:33,668 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:33,678 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:33,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-06-06 00:09:33,678 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:33,686 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:33,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:09:33,687 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:33,697 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:33,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:09:33,698 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:33,707 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:33,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:09:33,708 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:33,721 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:33,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:09:33,723 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:33,735 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:33,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:09:33,736 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:33,747 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:33,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:33,748 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:33,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:33,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:09:33,766 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:33,774 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:33,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:09:33,775 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:33,867 INFO L628 ElimStorePlain]: treesize reduction 15, result has 83.9 percent of original size [2021-06-06 00:09:33,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:09:33,868 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-06-06 00:09:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:33,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898287437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:33,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:33,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:09:33,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304411947] [2021-06-06 00:09:33,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:09:33,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:33,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:09:33,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:09:33,949 INFO L87 Difference]: Start difference. First operand 1550 states and 5234 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:35,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:35,183 INFO L93 Difference]: Finished difference Result 2118 states and 6970 transitions. [2021-06-06 00:09:35,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:09:35,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:35,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:35,186 INFO L225 Difference]: With dead ends: 2118 [2021-06-06 00:09:35,187 INFO L226 Difference]: Without dead ends: 2084 [2021-06-06 00:09:35,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1444.6ms TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:09:35,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-06-06 00:09:35,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1569. [2021-06-06 00:09:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1568 states have (on average 3.3832908163265305) internal successors, (5305), 1568 states have internal predecessors, (5305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:35,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 5305 transitions. [2021-06-06 00:09:35,206 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 5305 transitions. Word has length 26 [2021-06-06 00:09:35,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:35,207 INFO L482 AbstractCegarLoop]: Abstraction has 1569 states and 5305 transitions. [2021-06-06 00:09:35,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:35,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 5305 transitions. [2021-06-06 00:09:35,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:35,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:35,208 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:35,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1342 [2021-06-06 00:09:35,409 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:35,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:35,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 25 times [2021-06-06 00:09:35,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:35,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494163997] [2021-06-06 00:09:35,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:35,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:35,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494163997] [2021-06-06 00:09:35,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494163997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:35,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934073615] [2021-06-06 00:09:35,853 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 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 [2021-06-06 00:09:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:35,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:09:35,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:36,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:36,424 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:09:36,425 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 28 treesize of output 24 [2021-06-06 00:09:36,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:36,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:36,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:36,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-06 00:09:36,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:36,794 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2021-06-06 00:09:36,794 INFO L628 ElimStorePlain]: treesize reduction 33, result has 92.4 percent of original size [2021-06-06 00:09:36,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:36,818 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:09:36,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 21 [2021-06-06 00:09:36,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:36,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:36,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:36,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-06 00:09:36,856 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:37,031 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-06 00:09:37,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:37,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:37,056 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:37,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 28 [2021-06-06 00:09:37,058 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:37,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:37,087 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:09:37,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 25 [2021-06-06 00:09:37,091 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:37,248 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-06 00:09:37,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:37,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:37,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:37,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-06 00:09:37,272 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:37,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:37,290 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:09:37,291 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 30 treesize of output 24 [2021-06-06 00:09:37,292 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:37,586 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-06-06 00:09:37,587 INFO L628 ElimStorePlain]: treesize reduction 16, result has 95.3 percent of original size [2021-06-06 00:09:37,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:37,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:37,604 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 30 treesize of output 32 [2021-06-06 00:09:37,607 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:37,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:37,624 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:09:37,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:09:37,625 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:37,878 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-06 00:09:37,879 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-06-06 00:09:37,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-06 00:09:37,906 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 11 variables, input treesize:457, output treesize:253 [2021-06-06 00:09:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:38,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934073615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:38,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:38,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:09:38,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208916106] [2021-06-06 00:09:38,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:09:38,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:38,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:09:38,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:09:38,073 INFO L87 Difference]: Start difference. First operand 1569 states and 5305 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:38,559 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-06-06 00:09:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:39,275 INFO L93 Difference]: Finished difference Result 2132 states and 7032 transitions. [2021-06-06 00:09:39,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:09:39,275 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:39,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:39,278 INFO L225 Difference]: With dead ends: 2132 [2021-06-06 00:09:39,278 INFO L226 Difference]: Without dead ends: 2107 [2021-06-06 00:09:39,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1596.0ms TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:09:39,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-06-06 00:09:39,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1575. [2021-06-06 00:09:39,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.3818297331639138) internal successors, (5323), 1574 states have internal predecessors, (5323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:39,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5323 transitions. [2021-06-06 00:09:39,296 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5323 transitions. Word has length 26 [2021-06-06 00:09:39,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:39,297 INFO L482 AbstractCegarLoop]: Abstraction has 1575 states and 5323 transitions. [2021-06-06 00:09:39,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:39,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5323 transitions. [2021-06-06 00:09:39,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:39,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:39,299 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:39,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:39,499 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:39,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:39,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1510554133, now seen corresponding path program 42 times [2021-06-06 00:09:39,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:39,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792349967] [2021-06-06 00:09:39,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:39,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:39,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792349967] [2021-06-06 00:09:39,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792349967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:39,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323063481] [2021-06-06 00:09:39,912 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 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 [2021-06-06 00:09:39,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:09:39,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:39,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:09:39,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:40,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:40,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,507 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 30 treesize of output 16 [2021-06-06 00:09:40,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:40,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:40,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,514 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 33 treesize of output 13 [2021-06-06 00:09:40,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:40,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:40,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,521 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:09:40,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:40,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:40,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,528 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 41 treesize of output 13 [2021-06-06 00:09:40,529 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:40,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:40,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,536 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-06 00:09:40,537 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:40,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:40,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,543 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 35 treesize of output 19 [2021-06-06 00:09:40,544 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:40,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:40,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,551 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 39 treesize of output 19 [2021-06-06 00:09:40,551 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:40,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:40,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,558 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 30 treesize of output 16 [2021-06-06 00:09:40,558 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:40,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:40,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,565 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 37 treesize of output 19 [2021-06-06 00:09:40,566 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:40,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:40,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,572 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 41 treesize of output 16 [2021-06-06 00:09:40,573 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:40,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:40,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,579 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 35 treesize of output 19 [2021-06-06 00:09:40,580 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:40,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:40,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:09:40,587 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:40,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:40,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,593 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 39 treesize of output 13 [2021-06-06 00:09:40,594 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:40,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:40,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,600 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 32 treesize of output 16 [2021-06-06 00:09:40,601 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:40,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:40,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:40,604 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-06 00:09:40,605 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:40,624 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-06 00:09:40,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:09:40,626 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-06 00:09:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:40,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323063481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:40,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:40,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-06 00:09:40,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844898949] [2021-06-06 00:09:40,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:09:40,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:40,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:09:40,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:09:40,663 INFO L87 Difference]: Start difference. First operand 1575 states and 5323 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:41,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:41,721 INFO L93 Difference]: Finished difference Result 2018 states and 6640 transitions. [2021-06-06 00:09:41,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:09:41,721 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:41,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:41,724 INFO L225 Difference]: With dead ends: 2018 [2021-06-06 00:09:41,724 INFO L226 Difference]: Without dead ends: 1992 [2021-06-06 00:09:41,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1221.0ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:09:41,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-06-06 00:09:41,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1579. [2021-06-06 00:09:41,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.379594423320659) internal successors, (5333), 1578 states have internal predecessors, (5333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5333 transitions. [2021-06-06 00:09:41,745 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5333 transitions. Word has length 26 [2021-06-06 00:09:41,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:41,745 INFO L482 AbstractCegarLoop]: Abstraction has 1579 states and 5333 transitions. [2021-06-06 00:09:41,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:41,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5333 transitions. [2021-06-06 00:09:41,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:41,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:41,748 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:41,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1435,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:41,964 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:41,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:41,964 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-06-06 00:09:41,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:41,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560799435] [2021-06-06 00:09:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:42,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:42,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560799435] [2021-06-06 00:09:42,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560799435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:42,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361244006] [2021-06-06 00:09:42,372 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 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 [2021-06-06 00:09:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:42,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:09:42,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:42,698 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_163], 5=[v_prenex_165, v_prenex_167]} [2021-06-06 00:09:42,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,704 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 23 treesize of output 13 [2021-06-06 00:09:42,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,790 INFO L628 ElimStorePlain]: treesize reduction 135, result has 43.3 percent of original size [2021-06-06 00:09:42,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,793 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 23 treesize of output 13 [2021-06-06 00:09:42,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:42,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,823 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 27 treesize of output 13 [2021-06-06 00:09:42,824 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:42,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:42,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:09:42,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-06 00:09:42,852 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:42,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:42,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:09:42,874 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:24 [2021-06-06 00:09:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:42,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361244006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:42,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:42,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-06 00:09:42,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853576706] [2021-06-06 00:09:42,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:09:42,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:42,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:09:42,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:09:42,912 INFO L87 Difference]: Start difference. First operand 1579 states and 5333 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:44,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:44,569 INFO L93 Difference]: Finished difference Result 2235 states and 7337 transitions. [2021-06-06 00:09:44,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:09:44,569 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:44,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:44,572 INFO L225 Difference]: With dead ends: 2235 [2021-06-06 00:09:44,572 INFO L226 Difference]: Without dead ends: 2220 [2021-06-06 00:09:44,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1781.6ms TimeCoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:09:44,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-06-06 00:09:44,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1579. [2021-06-06 00:09:44,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.379594423320659) internal successors, (5333), 1578 states have internal predecessors, (5333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:44,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5333 transitions. [2021-06-06 00:09:44,592 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5333 transitions. Word has length 26 [2021-06-06 00:09:44,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:44,592 INFO L482 AbstractCegarLoop]: Abstraction has 1579 states and 5333 transitions. [2021-06-06 00:09:44,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:44,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5333 transitions. [2021-06-06 00:09:44,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:44,594 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:44,594 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:44,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1543 [2021-06-06 00:09:44,795 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:44,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:44,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 26 times [2021-06-06 00:09:44,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:44,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144155045] [2021-06-06 00:09:44,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:45,102 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-06-06 00:09:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:45,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:45,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144155045] [2021-06-06 00:09:45,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144155045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:45,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623782538] [2021-06-06 00:09:45,294 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 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 [2021-06-06 00:09:45,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:09:45,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:45,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:09:45,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:45,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:45,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:09:45,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,634 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:45,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:09:45,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,643 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:45,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:09:45,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,652 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:45,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:45,652 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,663 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:45,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-06-06 00:09:45,664 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,673 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:45,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:45,674 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,685 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:45,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:09:45,686 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,695 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:45,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-06-06 00:09:45,696 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,705 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:45,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:09:45,705 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,716 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:09:45,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:09:45,717 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,726 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:45,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:09:45,727 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,736 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:45,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:09:45,737 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,746 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:45,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:09:45,746 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,754 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:45,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:09:45,755 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:45,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:09:45,767 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:45,773 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:09:45,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:09:45,774 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:45,843 INFO L628 ElimStorePlain]: treesize reduction 15, result has 83.9 percent of original size [2021-06-06 00:09:45,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:09:45,844 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-06-06 00:09:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:45,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623782538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:45,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:45,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:09:45,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281004410] [2021-06-06 00:09:45,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:09:45,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:45,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:09:45,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:09:45,925 INFO L87 Difference]: Start difference. First operand 1579 states and 5333 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:46,448 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-06 00:09:46,995 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-06 00:09:47,170 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-06 00:09:47,316 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-06-06 00:09:47,510 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-06 00:09:47,677 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-06-06 00:09:48,008 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-06-06 00:09:48,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:48,227 INFO L93 Difference]: Finished difference Result 2244 states and 7303 transitions. [2021-06-06 00:09:48,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:09:48,228 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:48,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:48,230 INFO L225 Difference]: With dead ends: 2244 [2021-06-06 00:09:48,230 INFO L226 Difference]: Without dead ends: 2225 [2021-06-06 00:09:48,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2500.1ms TimeCoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:09:48,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-06-06 00:09:48,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1598. [2021-06-06 00:09:48,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 3.3844708829054477) internal successors, (5405), 1597 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:48,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 5405 transitions. [2021-06-06 00:09:48,251 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 5405 transitions. Word has length 26 [2021-06-06 00:09:48,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:48,251 INFO L482 AbstractCegarLoop]: Abstraction has 1598 states and 5405 transitions. [2021-06-06 00:09:48,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:48,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 5405 transitions. [2021-06-06 00:09:48,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:48,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:48,253 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:48,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1557,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:09:48,454 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:48,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:48,454 INFO L82 PathProgramCache]: Analyzing trace with hash 519326571, now seen corresponding path program 44 times [2021-06-06 00:09:48,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:48,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816974702] [2021-06-06 00:09:48,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:48,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:48,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816974702] [2021-06-06 00:09:48,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816974702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:48,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976103017] [2021-06-06 00:09:48,845 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 [2021-06-06 00:09:48,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:09:48,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:48,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-06 00:09:48,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:49,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,397 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-06-06 00:09:49,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 41 [2021-06-06 00:09:49,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,426 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-06-06 00:09:49,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2021-06-06 00:09:49,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,454 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-06 00:09:49,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-06-06 00:09:49,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,482 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-06 00:09:49,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-06-06 00:09:49,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,509 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-06 00:09:49,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-06-06 00:09:49,513 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,528 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:09:49,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:09:49,529 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,544 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:09:49,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-06 00:09:49,545 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,560 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:09:49,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:09:49,561 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,576 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:09:49,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:09:49,577 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,592 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:09:49,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:09:49,592 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,607 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:09:49,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-06 00:09:49,608 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,622 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:09:49,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:09:49,623 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,636 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:09:49,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:09:49,637 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:09:49,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-06 00:09:49,666 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,679 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:09:49,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:09:49,680 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:49,688 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:09:49,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:09:49,688 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:49,815 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-06-06 00:09:49,815 INFO L628 ElimStorePlain]: treesize reduction 34, result has 75.2 percent of original size [2021-06-06 00:09:49,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:09:49,817 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:745, output treesize:75 [2021-06-06 00:09:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:49,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976103017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:49,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:49,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-06 00:09:49,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833355292] [2021-06-06 00:09:49,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:09:49,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:49,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:09:49,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:09:49,890 INFO L87 Difference]: Start difference. First operand 1598 states and 5405 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:51,925 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-06 00:09:52,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:52,226 INFO L93 Difference]: Finished difference Result 2476 states and 7899 transitions. [2021-06-06 00:09:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:09:52,226 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:52,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:52,229 INFO L225 Difference]: With dead ends: 2476 [2021-06-06 00:09:52,229 INFO L226 Difference]: Without dead ends: 2432 [2021-06-06 00:09:52,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 2335.2ms TimeCoverageRelationStatistics Valid=508, Invalid=2572, Unknown=0, NotChecked=0, Total=3080 [2021-06-06 00:09:52,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-06-06 00:09:52,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1605. [2021-06-06 00:09:52,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 3.385286783042394) internal successors, (5430), 1604 states have internal predecessors, (5430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:52,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5430 transitions. [2021-06-06 00:09:52,250 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5430 transitions. Word has length 26 [2021-06-06 00:09:52,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:52,250 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 5430 transitions. [2021-06-06 00:09:52,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:52,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5430 transitions. [2021-06-06 00:09:52,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:52,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:52,252 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:52,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1576 [2021-06-06 00:09:52,452 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:52,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:52,453 INFO L82 PathProgramCache]: Analyzing trace with hash -456992273, now seen corresponding path program 45 times [2021-06-06 00:09:52,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:52,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697854341] [2021-06-06 00:09:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:52,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:52,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697854341] [2021-06-06 00:09:52,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697854341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:52,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179690383] [2021-06-06 00:09:52,716 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 [2021-06-06 00:09:52,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:09:52,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:52,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-06 00:09:52,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:09:53,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,361 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-06 00:09:53,362 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 30 treesize of output 44 [2021-06-06 00:09:53,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:53,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,428 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-06 00:09:53,429 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 35 treesize of output 47 [2021-06-06 00:09:53,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:53,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,460 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:09:53,460 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 30 treesize of output 1 [2021-06-06 00:09:53,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:53,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,524 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-06 00:09:53,524 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 [2021-06-06 00:09:53,539 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:53,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,596 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-06 00:09:53,596 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 39 treesize of output 47 [2021-06-06 00:09:53,599 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:53,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,636 INFO L354 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2021-06-06 00:09:53,636 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 32 treesize of output 36 [2021-06-06 00:09:53,638 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:53,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,681 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-06 00:09:53,681 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 30 treesize of output 44 [2021-06-06 00:09:53,687 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:53,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,733 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-06 00:09:53,734 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 35 treesize of output 51 [2021-06-06 00:09:53,740 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:53,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,760 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:09:53,760 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 37 treesize of output 1 [2021-06-06 00:09:53,761 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:53,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,811 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-06 00:09:53,811 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 39 treesize of output 55 [2021-06-06 00:09:53,819 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:53,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,871 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-06 00:09:53,871 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 37 treesize of output 55 [2021-06-06 00:09:53,879 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:53,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,900 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:09:53,901 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 37 treesize of output 1 [2021-06-06 00:09:53,901 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:53,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,943 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-06 00:09:53,944 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 28 treesize of output 44 [2021-06-06 00:09:53,949 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:53,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,969 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:09:53,969 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 37 treesize of output 1 [2021-06-06 00:09:53,969 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:53,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:53,988 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:09:53,988 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 37 treesize of output 1 [2021-06-06 00:09:53,989 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:53,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:09:54,021 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-06 00:09:54,021 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 30 treesize of output 44 [2021-06-06 00:09:54,026 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:09:54,466 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2021-06-06 00:09:54,467 INFO L628 ElimStorePlain]: treesize reduction 251, result has 57.4 percent of original size [2021-06-06 00:09:54,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:09:54,474 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:945, output treesize:413 [2021-06-06 00:09:54,713 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-06 00:09:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:54,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179690383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:54,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:09:54,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-06 00:09:54,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702124478] [2021-06-06 00:09:54,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:09:54,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:09:54,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:09:54,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:09:54,876 INFO L87 Difference]: Start difference. First operand 1605 states and 5430 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:57,496 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-06 00:09:58,179 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-06-06 00:09:58,375 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-06 00:09:58,701 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-06-06 00:09:58,873 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-06 00:09:59,034 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-06-06 00:09:59,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:09:59,273 INFO L93 Difference]: Finished difference Result 3600 states and 11338 transitions. [2021-06-06 00:09:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-06 00:09:59,273 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:09:59,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:09:59,277 INFO L225 Difference]: With dead ends: 3600 [2021-06-06 00:09:59,278 INFO L226 Difference]: Without dead ends: 3564 [2021-06-06 00:09:59,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 4209.4ms TimeCoverageRelationStatistics Valid=893, Invalid=4959, Unknown=0, NotChecked=0, Total=5852 [2021-06-06 00:09:59,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-06-06 00:09:59,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 1759. [2021-06-06 00:09:59,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1758 states have (on average 3.4044368600682593) internal successors, (5985), 1758 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:59,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 5985 transitions. [2021-06-06 00:09:59,308 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 5985 transitions. Word has length 26 [2021-06-06 00:09:59,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:09:59,308 INFO L482 AbstractCegarLoop]: Abstraction has 1759 states and 5985 transitions. [2021-06-06 00:09:59,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:09:59,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 5985 transitions. [2021-06-06 00:09:59,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:09:59,310 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:09:59,310 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:09:59,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1682 [2021-06-06 00:09:59,517 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:09:59,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:09:59,518 INFO L82 PathProgramCache]: Analyzing trace with hash 745320095, now seen corresponding path program 46 times [2021-06-06 00:09:59,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:09:59,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350756948] [2021-06-06 00:09:59,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:09:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:09:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:09:59,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:09:59,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350756948] [2021-06-06 00:09:59,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350756948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:09:59,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136012027] [2021-06-06 00:09:59,714 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 [2021-06-06 00:09:59,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:09:59,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:09:59,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-06 00:09:59,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:00,193 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-06 00:10:00,616 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_183, v_prenex_187], 6=[A, v_prenex_185]} [2021-06-06 00:10:00,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:00,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:00,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:00,623 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 21 treesize of output 13 [2021-06-06 00:10:00,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:00,745 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-06 00:10:00,745 INFO L628 ElimStorePlain]: treesize reduction 151, result has 44.9 percent of original size [2021-06-06 00:10:00,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:00,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:00,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:00,751 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:10:00,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:00,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:00,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:00,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:00,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:00,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:00,795 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 [2021-06-06 00:10:00,796 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:00,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:00,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:00,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:00,833 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 23 treesize of output 13 [2021-06-06 00:10:00,834 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:00,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:00,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:10:00,865 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 16 variables, input treesize:314, output treesize:31 [2021-06-06 00:10:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:00,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136012027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:00,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:00,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-06 00:10:00,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632876025] [2021-06-06 00:10:00,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:10:00,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:00,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:10:00,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:10:00,905 INFO L87 Difference]: Start difference. First operand 1759 states and 5985 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:02,079 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 58 [2021-06-06 00:10:02,353 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-06 00:10:02,781 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-06-06 00:10:02,961 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-06 00:10:03,311 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 102 [2021-06-06 00:10:03,472 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-06 00:10:03,749 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 56 [2021-06-06 00:10:04,061 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-06-06 00:10:04,392 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 169 [2021-06-06 00:10:04,624 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 74 [2021-06-06 00:10:04,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:04,842 INFO L93 Difference]: Finished difference Result 3623 states and 11573 transitions. [2021-06-06 00:10:04,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:10:04,843 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:04,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:04,848 INFO L225 Difference]: With dead ends: 3623 [2021-06-06 00:10:04,848 INFO L226 Difference]: Without dead ends: 3587 [2021-06-06 00:10:04,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 3656.1ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:10:04,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3587 states. [2021-06-06 00:10:04,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3587 to 1939. [2021-06-06 00:10:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.4262125902992775) internal successors, (6640), 1938 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 6640 transitions. [2021-06-06 00:10:04,882 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 6640 transitions. Word has length 26 [2021-06-06 00:10:04,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:04,883 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 6640 transitions. [2021-06-06 00:10:04,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:04,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 6640 transitions. [2021-06-06 00:10:04,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:04,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:04,886 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:05,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1836,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:05,105 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:05,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:05,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1715998549, now seen corresponding path program 47 times [2021-06-06 00:10:05,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:05,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852460830] [2021-06-06 00:10:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:05,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:05,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852460830] [2021-06-06 00:10:05,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852460830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:05,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816684366] [2021-06-06 00:10:05,416 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 [2021-06-06 00:10:05,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:10:05,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:05,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:10:05,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:05,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:05,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:05,930 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-06 00:10:05,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-06-06 00:10:05,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:05,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:05,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:05,970 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:10:05,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-06-06 00:10:05,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:05,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:05,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:05,994 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:10:05,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:10:05,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:06,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,022 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-06 00:10:06,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-06-06 00:10:06,026 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:06,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,051 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:10:06,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-06-06 00:10:06,053 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:06,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:06,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-06 00:10:06,083 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:06,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,100 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:10:06,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:10:06,100 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:06,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,115 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:10:06,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:10:06,116 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:06,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,132 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:10:06,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:10:06,132 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:06,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,147 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:10:06,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-06 00:10:06,148 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:06,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,167 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:10:06,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:10:06,168 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:06,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:06,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-06 00:10:06,196 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:06,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,211 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:10:06,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-06 00:10:06,212 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:06,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,226 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:10:06,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-06 00:10:06,227 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:06,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,242 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:10:06,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-06-06 00:10:06,243 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:06,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:06,251 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:10:06,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:10:06,252 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:06,373 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-06-06 00:10:06,374 INFO L628 ElimStorePlain]: treesize reduction 56, result has 59.1 percent of original size [2021-06-06 00:10:06,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:10:06,376 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:71 [2021-06-06 00:10:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:06,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816684366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:06,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:06,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-06 00:10:06,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920556252] [2021-06-06 00:10:06,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:10:06,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:06,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:10:06,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:10:06,470 INFO L87 Difference]: Start difference. First operand 1939 states and 6640 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:08,729 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-06 00:10:08,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:08,910 INFO L93 Difference]: Finished difference Result 4085 states and 13117 transitions. [2021-06-06 00:10:08,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:10:08,910 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:08,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:08,916 INFO L225 Difference]: With dead ends: 4085 [2021-06-06 00:10:08,916 INFO L226 Difference]: Without dead ends: 4028 [2021-06-06 00:10:08,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 2359.8ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:10:08,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4028 states. [2021-06-06 00:10:08,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4028 to 2033. [2021-06-06 00:10:08,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.4463582677165356) internal successors, (7003), 2032 states have internal predecessors, (7003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:08,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7003 transitions. [2021-06-06 00:10:08,954 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7003 transitions. Word has length 26 [2021-06-06 00:10:08,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:08,954 INFO L482 AbstractCegarLoop]: Abstraction has 2033 states and 7003 transitions. [2021-06-06 00:10:08,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7003 transitions. [2021-06-06 00:10:08,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:08,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:08,956 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:09,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1872,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:09,157 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:09,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:09,157 INFO L82 PathProgramCache]: Analyzing trace with hash 134504147, now seen corresponding path program 27 times [2021-06-06 00:10:09,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:09,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176778155] [2021-06-06 00:10:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:09,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:09,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176778155] [2021-06-06 00:10:09,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176778155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:09,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378332615] [2021-06-06 00:10:09,468 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 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 [2021-06-06 00:10:09,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:10:09,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:09,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:10:09,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:09,895 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-06 00:10:10,122 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-06 00:10:10,288 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:10:10,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:10:10,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:10,313 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:10:10,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-06 00:10:10,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:10,675 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 127 [2021-06-06 00:10:10,676 INFO L628 ElimStorePlain]: treesize reduction 74, result has 85.2 percent of original size [2021-06-06 00:10:10,697 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:10:10,697 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 28 treesize of output 24 [2021-06-06 00:10:10,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:10,867 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-06 00:10:10,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:10,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:10,889 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 30 treesize of output 32 [2021-06-06 00:10:10,891 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:10,903 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:10:10,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:10:10,904 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:11,049 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-06 00:10:11,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:11,068 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:10:11,069 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 21 [2021-06-06 00:10:11,070 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:11,213 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-06 00:10:11,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:11,235 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:10:11,235 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 25 [2021-06-06 00:10:11,239 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:11,397 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-06 00:10:11,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:11,419 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:10:11,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-06 00:10:11,423 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:11,560 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-06 00:10:11,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:11,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:11,581 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 30 treesize of output 32 [2021-06-06 00:10:11,583 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:11,592 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:10:11,593 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 30 treesize of output 16 [2021-06-06 00:10:11,594 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:11,823 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 98 [2021-06-06 00:10:11,824 INFO L628 ElimStorePlain]: treesize reduction 25, result has 91.7 percent of original size [2021-06-06 00:10:11,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:11,838 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 16 treesize of output 26 [2021-06-06 00:10:11,842 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:11,950 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-06 00:10:11,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:11,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:10:11,978 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:563, output treesize:360 [2021-06-06 00:10:12,150 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-06-06 00:10:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:12,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378332615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:12,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:12,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-06 00:10:12,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838354121] [2021-06-06 00:10:12,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:10:12,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:12,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:10:12,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:10:12,205 INFO L87 Difference]: Start difference. First operand 2033 states and 7003 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:13,103 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-06-06 00:10:13,322 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-06-06 00:10:13,564 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-06 00:10:13,776 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-06 00:10:13,988 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-06 00:10:14,604 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2021-06-06 00:10:15,156 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 87 [2021-06-06 00:10:15,597 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 108 [2021-06-06 00:10:16,167 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 112 [2021-06-06 00:10:16,883 WARN L205 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 109 [2021-06-06 00:10:17,457 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 90 [2021-06-06 00:10:17,723 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 73 [2021-06-06 00:10:18,673 WARN L205 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 112 [2021-06-06 00:10:19,177 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 76 [2021-06-06 00:10:19,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:19,331 INFO L93 Difference]: Finished difference Result 2749 states and 9119 transitions. [2021-06-06 00:10:19,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:10:19,331 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:19,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:19,335 INFO L225 Difference]: With dead ends: 2749 [2021-06-06 00:10:19,335 INFO L226 Difference]: Without dead ends: 2719 [2021-06-06 00:10:19,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 7217.6ms TimeCoverageRelationStatistics Valid=336, Invalid=1920, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:10:19,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2021-06-06 00:10:19,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2036. [2021-06-06 00:10:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2035 states have (on average 3.444226044226044) internal successors, (7009), 2035 states have internal predecessors, (7009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 7009 transitions. [2021-06-06 00:10:19,360 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 7009 transitions. Word has length 26 [2021-06-06 00:10:19,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:19,361 INFO L482 AbstractCegarLoop]: Abstraction has 2036 states and 7009 transitions. [2021-06-06 00:10:19,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:19,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 7009 transitions. [2021-06-06 00:10:19,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:19,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:19,363 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:19,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1978 [2021-06-06 00:10:19,563 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:19,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:19,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1483028633, now seen corresponding path program 28 times [2021-06-06 00:10:19,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:19,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169573489] [2021-06-06 00:10:19,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:19,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:19,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169573489] [2021-06-06 00:10:19,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169573489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:19,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829977860] [2021-06-06 00:10:19,956 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 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 [2021-06-06 00:10:19,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:10:19,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:19,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:10:19,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:20,315 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-06 00:10:20,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:20,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:20,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:10:20,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:20,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:20,448 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:20,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:10:20,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:20,805 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 124 [2021-06-06 00:10:20,806 INFO L628 ElimStorePlain]: treesize reduction 69, result has 84.4 percent of original size [2021-06-06 00:10:20,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:20,819 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:20,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:10:20,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:20,965 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-06 00:10:20,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:20,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:20,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:20,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:10:20,981 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,120 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-06 00:10:21,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:21,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,133 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:21,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:10:21,134 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,269 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-06 00:10:21,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:21,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:21,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:10:21,287 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,298 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:10:21,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:10:21,298 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,411 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-06 00:10:21,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:21,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:21,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:10:21,429 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:21,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:10:21,443 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,620 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2021-06-06 00:10:21,621 INFO L628 ElimStorePlain]: treesize reduction 20, result has 91.7 percent of original size [2021-06-06 00:10:21,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:21,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:10:21,642 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:21,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:21,733 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:21,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:10:21,735 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:21,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:21,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:10:21,815 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:503, output treesize:152 [2021-06-06 00:10:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:21,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829977860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:21,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:21,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:10:21,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958658855] [2021-06-06 00:10:21,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:10:21,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:21,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:10:21,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:10:21,949 INFO L87 Difference]: Start difference. First operand 2036 states and 7009 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:22,724 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-06 00:10:23,408 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-06 00:10:23,596 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-06 00:10:24,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:24,006 INFO L93 Difference]: Finished difference Result 2932 states and 9765 transitions. [2021-06-06 00:10:24,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:10:24,006 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:24,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:24,010 INFO L225 Difference]: With dead ends: 2932 [2021-06-06 00:10:24,010 INFO L226 Difference]: Without dead ends: 2898 [2021-06-06 00:10:24,010 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2051.7ms TimeCoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:10:24,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2021-06-06 00:10:24,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2045. [2021-06-06 00:10:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 3.4486301369863015) internal successors, (7049), 2044 states have internal predecessors, (7049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7049 transitions. [2021-06-06 00:10:24,039 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7049 transitions. Word has length 26 [2021-06-06 00:10:24,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:24,039 INFO L482 AbstractCegarLoop]: Abstraction has 2045 states and 7049 transitions. [2021-06-06 00:10:24,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7049 transitions. [2021-06-06 00:10:24,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:24,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:24,042 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:24,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2014,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:24,242 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:24,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1121995759, now seen corresponding path program 29 times [2021-06-06 00:10:24,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:24,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914280716] [2021-06-06 00:10:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:24,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:24,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914280716] [2021-06-06 00:10:24,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914280716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:24,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998832915] [2021-06-06 00:10:24,575 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 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 [2021-06-06 00:10:24,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:10:24,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:24,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:10:24,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:25,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:25,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:25,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-06 00:10:25,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:25,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:25,052 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:25,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-06-06 00:10:25,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:25,365 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2021-06-06 00:10:25,366 INFO L628 ElimStorePlain]: treesize reduction 17, result has 95.4 percent of original size [2021-06-06 00:10:25,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:25,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:25,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:10:25,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:25,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:25,397 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:25,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-06 00:10:25,398 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:25,535 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-06 00:10:25,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:25,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:25,549 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:25,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:10:25,551 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:25,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:25,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:25,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:10:25,563 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:25,692 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-06 00:10:25,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:25,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:25,705 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:25,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:10:25,706 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:25,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:25,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:25,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:10:25,718 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:25,836 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-06 00:10:25,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:25,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:25,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:25,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:10:25,854 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:25,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:25,864 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:10:25,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:10:25,866 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:25,969 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-06 00:10:25,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:25,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-06 00:10:25,975 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:407, output treesize:176 [2021-06-06 00:10:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:26,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998832915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:26,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:26,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:10:26,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422041899] [2021-06-06 00:10:26,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:10:26,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:26,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:10:26,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:10:26,112 INFO L87 Difference]: Start difference. First operand 2045 states and 7049 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:27,075 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-06-06 00:10:27,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:27,532 INFO L93 Difference]: Finished difference Result 2657 states and 8964 transitions. [2021-06-06 00:10:27,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:10:27,532 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:27,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:27,535 INFO L225 Difference]: With dead ends: 2657 [2021-06-06 00:10:27,535 INFO L226 Difference]: Without dead ends: 2632 [2021-06-06 00:10:27,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1507.9ms TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:10:27,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-06-06 00:10:27,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2045. [2021-06-06 00:10:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 3.4486301369863015) internal successors, (7049), 2044 states have internal predecessors, (7049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:27,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7049 transitions. [2021-06-06 00:10:27,560 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7049 transitions. Word has length 26 [2021-06-06 00:10:27,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:27,560 INFO L482 AbstractCegarLoop]: Abstraction has 2045 states and 7049 transitions. [2021-06-06 00:10:27,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:27,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7049 transitions. [2021-06-06 00:10:27,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:27,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:27,563 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:27,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2042,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:27,763 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:27,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:27,764 INFO L82 PathProgramCache]: Analyzing trace with hash 568891871, now seen corresponding path program 48 times [2021-06-06 00:10:27,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:27,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129696042] [2021-06-06 00:10:27,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:28,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:28,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129696042] [2021-06-06 00:10:28,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129696042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:28,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083329234] [2021-06-06 00:10:28,137 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 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 [2021-06-06 00:10:28,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:10:28,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:28,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:10:28,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:28,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,619 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 32 treesize of output 13 [2021-06-06 00:10:28,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:28,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,630 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 43 treesize of output 16 [2021-06-06 00:10:28,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:28,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,641 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 41 treesize of output 19 [2021-06-06 00:10:28,641 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:28,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,650 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 36 treesize of output 16 [2021-06-06 00:10:28,651 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:28,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,661 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 41 treesize of output 19 [2021-06-06 00:10:28,661 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:28,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,670 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 37 treesize of output 13 [2021-06-06 00:10:28,672 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:28,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,685 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 43 treesize of output 13 [2021-06-06 00:10:28,686 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:28,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,695 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 32 treesize of output 16 [2021-06-06 00:10:28,695 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:28,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,703 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 30 treesize of output 13 [2021-06-06 00:10:28,704 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:28,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,713 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 36 treesize of output 16 [2021-06-06 00:10:28,714 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:28,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,723 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 39 treesize of output 19 [2021-06-06 00:10:28,723 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:28,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,732 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 43 treesize of output 16 [2021-06-06 00:10:28,733 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:28,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,741 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 43 treesize of output 13 [2021-06-06 00:10:28,742 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:28,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,751 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 39 treesize of output 19 [2021-06-06 00:10:28,751 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:28,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:28,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:28,755 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 32 treesize of output 16 [2021-06-06 00:10:28,756 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:28,778 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-06 00:10:28,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:10:28,780 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:683, output treesize:15 [2021-06-06 00:10:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:28,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083329234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:28,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:28,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:10:28,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406251635] [2021-06-06 00:10:28,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:10:28,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:28,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:10:28,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:10:28,845 INFO L87 Difference]: Start difference. First operand 2045 states and 7049 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:30,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:30,198 INFO L93 Difference]: Finished difference Result 2543 states and 8526 transitions. [2021-06-06 00:10:30,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:10:30,198 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:30,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:30,201 INFO L225 Difference]: With dead ends: 2543 [2021-06-06 00:10:30,201 INFO L226 Difference]: Without dead ends: 2521 [2021-06-06 00:10:30,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1402.9ms TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:10:30,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-06-06 00:10:30,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2041. [2021-06-06 00:10:30,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4475490196078433) internal successors, (7033), 2040 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:30,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7033 transitions. [2021-06-06 00:10:30,225 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7033 transitions. Word has length 26 [2021-06-06 00:10:30,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:30,225 INFO L482 AbstractCegarLoop]: Abstraction has 2041 states and 7033 transitions. [2021-06-06 00:10:30,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:30,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7033 transitions. [2021-06-06 00:10:30,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:30,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:30,227 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:30,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2078 [2021-06-06 00:10:30,428 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:30,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:30,428 INFO L82 PathProgramCache]: Analyzing trace with hash 650290927, now seen corresponding path program 49 times [2021-06-06 00:10:30,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:30,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743875474] [2021-06-06 00:10:30,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:30,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:30,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743875474] [2021-06-06 00:10:30,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743875474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:30,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279075990] [2021-06-06 00:10:30,772 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 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 [2021-06-06 00:10:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:30,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:10:30,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:31,097 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-06-06 00:10:31,148 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_230, v_prenex_232], 5=[v_prenex_228, A]} [2021-06-06 00:10:31,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:31,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:31,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:31,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:31,155 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 28 treesize of output 13 [2021-06-06 00:10:31,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:31,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:31,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:31,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:31,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:10:31,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:31,252 INFO L628 ElimStorePlain]: treesize reduction 143, result has 43.7 percent of original size [2021-06-06 00:10:31,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:31,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-06 00:10:31,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:31,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:31,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:31,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:31,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-06 00:10:31,290 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:31,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:31,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:31,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:31,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:31,320 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 27 treesize of output 13 [2021-06-06 00:10:31,320 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:31,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:31,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:10:31,345 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:307, output treesize:27 [2021-06-06 00:10:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:31,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279075990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:31,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:31,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-06 00:10:31,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972308416] [2021-06-06 00:10:31,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:10:31,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:31,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:10:31,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:10:31,383 INFO L87 Difference]: Start difference. First operand 2041 states and 7033 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:33,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:33,577 INFO L93 Difference]: Finished difference Result 2757 states and 9218 transitions. [2021-06-06 00:10:33,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:10:33,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:33,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:33,581 INFO L225 Difference]: With dead ends: 2757 [2021-06-06 00:10:33,581 INFO L226 Difference]: Without dead ends: 2742 [2021-06-06 00:10:33,581 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 2154.8ms TimeCoverageRelationStatistics Valid=496, Invalid=2054, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:10:33,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2742 states. [2021-06-06 00:10:33,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2742 to 2041. [2021-06-06 00:10:33,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4475490196078433) internal successors, (7033), 2040 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:33,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7033 transitions. [2021-06-06 00:10:33,606 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7033 transitions. Word has length 26 [2021-06-06 00:10:33,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:33,606 INFO L482 AbstractCegarLoop]: Abstraction has 2041 states and 7033 transitions. [2021-06-06 00:10:33,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:33,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7033 transitions. [2021-06-06 00:10:33,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:33,608 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:33,609 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:33,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2168 [2021-06-06 00:10:33,809 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:33,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:33,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1306035039, now seen corresponding path program 50 times [2021-06-06 00:10:33,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:33,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115419499] [2021-06-06 00:10:33,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:34,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:34,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115419499] [2021-06-06 00:10:34,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115419499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:34,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537019186] [2021-06-06 00:10:34,052 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 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 [2021-06-06 00:10:34,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:10:34,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:34,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:10:34,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:34,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,297 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-06 00:10:34,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-06-06 00:10:34,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:34,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-06-06 00:10:34,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:34,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-06 00:10:34,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:34,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 45 [2021-06-06 00:10:34,393 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,409 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:10:34,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:10:34,410 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,433 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-06-06 00:10:34,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-06 00:10:34,435 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,465 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-06 00:10:34,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-06-06 00:10:34,467 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,483 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:10:34,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:10:34,483 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,498 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:10:34,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:10:34,499 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,514 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:10:34,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:10:34,515 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,530 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:10:34,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:10:34,531 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,545 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:10:34,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-06 00:10:34,546 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,561 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:10:34,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:10:34,562 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,584 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-06 00:10:34,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:10:34,585 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,607 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-06 00:10:34,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-06 00:10:34,608 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:34,617 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:10:34,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:10:34,618 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:34,689 INFO L628 ElimStorePlain]: treesize reduction 132, result has 34.3 percent of original size [2021-06-06 00:10:34,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:10:34,690 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:69 [2021-06-06 00:10:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:34,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537019186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:34,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:34,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-06-06 00:10:34,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638950352] [2021-06-06 00:10:34,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:10:34,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:34,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:10:34,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:10:34,781 INFO L87 Difference]: Start difference. First operand 2041 states and 7033 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:35,449 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-06-06 00:10:38,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:38,278 INFO L93 Difference]: Finished difference Result 3704 states and 11942 transitions. [2021-06-06 00:10:38,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:10:38,278 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:38,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:38,283 INFO L225 Difference]: With dead ends: 3704 [2021-06-06 00:10:38,283 INFO L226 Difference]: Without dead ends: 3647 [2021-06-06 00:10:38,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 3133.2ms TimeCoverageRelationStatistics Valid=843, Invalid=3579, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:10:38,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2021-06-06 00:10:38,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 2063. [2021-06-06 00:10:38,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 2062 states have (on average 3.4393792434529584) internal successors, (7092), 2062 states have internal predecessors, (7092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 7092 transitions. [2021-06-06 00:10:38,315 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 7092 transitions. Word has length 26 [2021-06-06 00:10:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:38,316 INFO L482 AbstractCegarLoop]: Abstraction has 2063 states and 7092 transitions. [2021-06-06 00:10:38,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 7092 transitions. [2021-06-06 00:10:38,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:38,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:38,318 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:38,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2182,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:10:38,520 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:38,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2073850769, now seen corresponding path program 51 times [2021-06-06 00:10:38,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:38,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966040289] [2021-06-06 00:10:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:38,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:38,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966040289] [2021-06-06 00:10:38,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966040289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:38,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39686054] [2021-06-06 00:10:38,754 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 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 [2021-06-06 00:10:38,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:10:38,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:38,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:10:38,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:39,149 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-06-06 00:10:39,440 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-06 00:10:39,440 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 47 [2021-06-06 00:10:39,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:39,501 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-06-06 00:10:39,501 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 28 treesize of output 36 [2021-06-06 00:10:39,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:40,041 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-06-06 00:10:40,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:40,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:40,088 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 35 treesize of output 59 [2021-06-06 00:10:40,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:40,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:40,141 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 35 treesize of output 59 [2021-06-06 00:10:40,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:41,130 WARN L205 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 168 [2021-06-06 00:10:41,131 INFO L628 ElimStorePlain]: treesize reduction 114, result has 87.7 percent of original size [2021-06-06 00:10:41,190 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-06 00:10:41,190 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 26 treesize of output 48 [2021-06-06 00:10:41,198 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:41,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:41,233 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 21 treesize of output 53 [2021-06-06 00:10:41,247 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:41,693 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-06 00:10:41,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:41,755 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-06 00:10:41,755 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 55 [2021-06-06 00:10:41,763 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:41,813 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-06 00:10:41,813 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 28 treesize of output 48 [2021-06-06 00:10:41,821 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:42,706 WARN L205 SmtUtils]: Spent 884.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 151 [2021-06-06 00:10:42,706 INFO L628 ElimStorePlain]: treesize reduction 37, result has 95.3 percent of original size [2021-06-06 00:10:42,760 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-06 00:10:42,760 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 31 treesize of output 47 [2021-06-06 00:10:42,764 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:42,808 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-06 00:10:42,808 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 26 treesize of output 44 [2021-06-06 00:10:42,813 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:43,238 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-06 00:10:43,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:43,285 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-06 00:10:43,285 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 28 treesize of output 40 [2021-06-06 00:10:43,289 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:43,336 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-06 00:10:43,336 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 28 treesize of output 48 [2021-06-06 00:10:43,346 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:44,104 WARN L205 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 135 [2021-06-06 00:10:44,105 INFO L628 ElimStorePlain]: treesize reduction 45, result has 93.8 percent of original size [2021-06-06 00:10:44,155 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-06 00:10:44,155 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 47 [2021-06-06 00:10:44,158 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:44,204 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-06 00:10:44,204 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 51 [2021-06-06 00:10:44,209 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:44,958 WARN L205 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 130 [2021-06-06 00:10:44,958 INFO L628 ElimStorePlain]: treesize reduction 24, result has 96.5 percent of original size [2021-06-06 00:10:45,013 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-06 00:10:45,014 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 35 treesize of output 55 [2021-06-06 00:10:45,023 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:45,069 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-06 00:10:45,069 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 35 treesize of output 55 [2021-06-06 00:10:45,078 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:46,181 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 141 DAG size of output: 135 [2021-06-06 00:10:46,182 INFO L628 ElimStorePlain]: treesize reduction 50, result has 93.1 percent of original size [2021-06-06 00:10:46,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-06-06 00:10:46,227 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:833, output treesize:1677 [2021-06-06 00:10:46,751 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2021-06-06 00:10:46,998 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-06-06 00:10:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:47,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39686054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:47,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:47,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-06 00:10:47,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029564348] [2021-06-06 00:10:47,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:10:47,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:47,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:10:47,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:10:47,132 INFO L87 Difference]: Start difference. First operand 2063 states and 7092 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:47,675 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 41 [2021-06-06 00:10:47,972 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2021-06-06 00:10:48,359 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-06 00:10:49,104 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-06-06 00:10:49,398 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-06-06 00:10:49,804 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 47 [2021-06-06 00:10:50,243 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2021-06-06 00:10:50,437 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2021-06-06 00:10:50,602 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 35 [2021-06-06 00:10:51,066 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-06-06 00:10:51,843 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 73 [2021-06-06 00:10:52,052 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2021-06-06 00:10:52,341 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-06-06 00:10:52,769 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 35 [2021-06-06 00:10:52,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:52,874 INFO L93 Difference]: Finished difference Result 3467 states and 11274 transitions. [2021-06-06 00:10:52,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:10:52,874 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:52,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:52,879 INFO L225 Difference]: With dead ends: 3467 [2021-06-06 00:10:52,879 INFO L226 Difference]: Without dead ends: 3422 [2021-06-06 00:10:52,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 6105.5ms TimeCoverageRelationStatistics Valid=789, Invalid=3633, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:10:52,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-06-06 00:10:52,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 2089. [2021-06-06 00:10:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 3.4454022988505746) internal successors, (7194), 2088 states have internal predecessors, (7194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:52,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 7194 transitions. [2021-06-06 00:10:52,910 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 7194 transitions. Word has length 26 [2021-06-06 00:10:52,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:52,910 INFO L482 AbstractCegarLoop]: Abstraction has 2089 states and 7194 transitions. [2021-06-06 00:10:52,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:52,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 7194 transitions. [2021-06-06 00:10:52,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:52,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:52,913 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:53,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2216 [2021-06-06 00:10:53,113 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:53,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:53,114 INFO L82 PathProgramCache]: Analyzing trace with hash 436262311, now seen corresponding path program 52 times [2021-06-06 00:10:53,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:53,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115240213] [2021-06-06 00:10:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:53,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:53,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115240213] [2021-06-06 00:10:53,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115240213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:53,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345031822] [2021-06-06 00:10:53,414 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 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 [2021-06-06 00:10:53,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:10:53,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:53,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:10:53,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:53,911 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_258], 5=[v_prenex_254, v_prenex_256]} [2021-06-06 00:10:53,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:53,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:53,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:53,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:53,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-06 00:10:53,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:53,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:53,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:53,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:53,924 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 30 treesize of output 13 [2021-06-06 00:10:53,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:53,997 INFO L628 ElimStorePlain]: treesize reduction 130, result has 39.0 percent of original size [2021-06-06 00:10:53,997 INFO L518 ElimStorePlain]: Eliminatee v_prenex_258 vanished before elimination [2021-06-06 00:10:54,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:54,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,001 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 25 treesize of output 13 [2021-06-06 00:10:54,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:54,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:54,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:10:54,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:10:54,028 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:54,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:54,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:10:54,049 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:31 [2021-06-06 00:10:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:54,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345031822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:54,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:10:54,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-06 00:10:54,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859920767] [2021-06-06 00:10:54,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:10:54,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:10:54,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:10:54,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:10:54,087 INFO L87 Difference]: Start difference. First operand 2089 states and 7194 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:56,186 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-06-06 00:10:56,309 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-06-06 00:10:56,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:10:56,445 INFO L93 Difference]: Finished difference Result 2641 states and 8863 transitions. [2021-06-06 00:10:56,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:10:56,446 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:10:56,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:10:56,450 INFO L225 Difference]: With dead ends: 2641 [2021-06-06 00:10:56,450 INFO L226 Difference]: Without dead ends: 2626 [2021-06-06 00:10:56,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 2239.1ms TimeCoverageRelationStatistics Valid=362, Invalid=1800, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:10:56,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-06 00:10:56,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2087. [2021-06-06 00:10:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 3.4453499520613615) internal successors, (7187), 2086 states have internal predecessors, (7187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 7187 transitions. [2021-06-06 00:10:56,475 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 7187 transitions. Word has length 26 [2021-06-06 00:10:56,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:10:56,475 INFO L482 AbstractCegarLoop]: Abstraction has 2087 states and 7187 transitions. [2021-06-06 00:10:56,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:10:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 7187 transitions. [2021-06-06 00:10:56,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:10:56,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:10:56,478 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:10:56,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2343 [2021-06-06 00:10:56,678 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:10:56,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:10:56,679 INFO L82 PathProgramCache]: Analyzing trace with hash 2135160291, now seen corresponding path program 53 times [2021-06-06 00:10:56,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:10:56,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953844386] [2021-06-06 00:10:56,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:10:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:10:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:10:56,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:10:56,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953844386] [2021-06-06 00:10:56,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953844386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:10:56,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964078213] [2021-06-06 00:10:56,905 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 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 [2021-06-06 00:10:56,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:10:56,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:10:56,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:10:56,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:10:57,527 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-06-06 00:10:57,736 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-06 00:10:57,942 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_270, v_prenex_271, v_prenex_273, v_prenex_267, v_prenex_268], 6=[v_prenex_272, v_prenex_269]} [2021-06-06 00:10:57,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:57,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:57,977 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:10:57,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-06-06 00:10:57,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:57,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:57,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:58,010 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:10:58,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-06 00:10:58,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:58,726 WARN L205 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 161 [2021-06-06 00:10:58,727 INFO L628 ElimStorePlain]: treesize reduction 31, result has 96.1 percent of original size [2021-06-06 00:10:58,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:58,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:58,764 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:10:58,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-06 00:10:58,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:58,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:58,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:58,792 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:10:58,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-06-06 00:10:58,793 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:59,122 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-06 00:10:59,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:59,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:59,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:59,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:10:59,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-06-06 00:10:59,186 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:10:59,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:59,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:10:59,227 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-06 00:10:59,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-06-06 00:10:59,233 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:00,192 WARN L205 SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 142 [2021-06-06 00:11:00,192 INFO L628 ElimStorePlain]: treesize reduction 46, result has 93.5 percent of original size [2021-06-06 00:11:00,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:00,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:00,227 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:11:00,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-06-06 00:11:00,229 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:00,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:00,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:00,256 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:11:00,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-06-06 00:11:00,259 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:00,565 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-06 00:11:00,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:00,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:00,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:00,604 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-06 00:11:00,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-06-06 00:11:00,607 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:00,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:00,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:00,632 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-06 00:11:00,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-06-06 00:11:00,636 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:00,913 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-06 00:11:00,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:00,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:00,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:00,945 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-06 00:11:00,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-06-06 00:11:00,947 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:00,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:00,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:00,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:00,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-06 00:11:00,982 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,473 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 120 [2021-06-06 00:11:01,473 INFO L628 ElimStorePlain]: treesize reduction 35, result has 93.7 percent of original size [2021-06-06 00:11:01,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,502 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-06-06 00:11:01,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-06-06 00:11:01,504 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,530 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-06-06 00:11:01,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-06-06 00:11:01,534 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,945 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 109 [2021-06-06 00:11:01,946 INFO L628 ElimStorePlain]: treesize reduction 41, result has 91.5 percent of original size [2021-06-06 00:11:01,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:01,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-06-06 00:11:01,980 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:01,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:01,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:02,001 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-06-06 00:11:02,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-06-06 00:11:02,003 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:02,190 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-06 00:11:02,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:02,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-06 00:11:02,203 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:829, output treesize:384 [2021-06-06 00:11:02,407 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 27 [2021-06-06 00:11:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:02,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964078213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:02,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:02,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-06 00:11:02,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118338988] [2021-06-06 00:11:02,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:11:02,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:02,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:11:02,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:11:02,448 INFO L87 Difference]: Start difference. First operand 2087 states and 7187 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:07,008 WARN L205 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-06-06 00:11:08,485 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-06-06 00:11:09,225 WARN L205 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 170 [2021-06-06 00:11:09,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:09,811 INFO L93 Difference]: Finished difference Result 3018 states and 10044 transitions. [2021-06-06 00:11:09,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:11:09,811 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:09,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:09,815 INFO L225 Difference]: With dead ends: 3018 [2021-06-06 00:11:09,815 INFO L226 Difference]: Without dead ends: 2988 [2021-06-06 00:11:09,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 7699.6ms TimeCoverageRelationStatistics Valid=522, Invalid=2448, Unknown=0, NotChecked=0, Total=2970 [2021-06-06 00:11:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2021-06-06 00:11:09,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2087. [2021-06-06 00:11:09,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 3.4453499520613615) internal successors, (7187), 2086 states have internal predecessors, (7187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 7187 transitions. [2021-06-06 00:11:09,844 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 7187 transitions. Word has length 26 [2021-06-06 00:11:09,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:09,844 INFO L482 AbstractCegarLoop]: Abstraction has 2087 states and 7187 transitions. [2021-06-06 00:11:09,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:09,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 7187 transitions. [2021-06-06 00:11:09,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:09,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:09,847 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:10,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2357 [2021-06-06 00:11:10,047 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:10,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:10,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1001444339, now seen corresponding path program 54 times [2021-06-06 00:11:10,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:10,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669668173] [2021-06-06 00:11:10,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:10,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:10,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669668173] [2021-06-06 00:11:10,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669668173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:10,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706426743] [2021-06-06 00:11:10,356 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 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 [2021-06-06 00:11:10,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:11:10,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:10,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:11:10,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:10,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,601 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-06 00:11:10,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-06-06 00:11:10,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:10,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-06-06 00:11:10,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:10,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-06 00:11:10,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:10,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 45 [2021-06-06 00:11:10,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,713 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:11:10,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:11:10,714 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,737 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-06-06 00:11:10,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-06 00:11:10,739 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,763 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-06 00:11:10,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-06-06 00:11:10,765 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,780 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:11:10,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:11:10,781 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,796 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:11:10,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:11:10,796 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,812 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:11:10,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:11:10,813 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,828 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:11:10,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:11:10,828 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,842 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:11:10,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-06 00:11:10,843 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,858 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:11:10,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:11:10,859 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,881 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-06 00:11:10,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:11:10,883 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,904 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-06 00:11:10,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-06 00:11:10,906 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:10,915 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:11:10,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:11:10,915 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:10,989 INFO L628 ElimStorePlain]: treesize reduction 126, result has 35.4 percent of original size [2021-06-06 00:11:10,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:11:10,990 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:69 [2021-06-06 00:11:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:11,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706426743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:11,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:11,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-06 00:11:11,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455032878] [2021-06-06 00:11:11,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:11:11,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:11,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:11:11,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:11:11,079 INFO L87 Difference]: Start difference. First operand 2087 states and 7187 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:13,658 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-06-06 00:11:14,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:14,211 INFO L93 Difference]: Finished difference Result 3534 states and 11458 transitions. [2021-06-06 00:11:14,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:11:14,211 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:14,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:14,228 INFO L225 Difference]: With dead ends: 3534 [2021-06-06 00:11:14,228 INFO L226 Difference]: Without dead ends: 3500 [2021-06-06 00:11:14,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 2950.3ms TimeCoverageRelationStatistics Valid=658, Invalid=2534, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:11:14,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-06-06 00:11:14,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 2096. [2021-06-06 00:11:14,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 3.4520286396181383) internal successors, (7232), 2095 states have internal predecessors, (7232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:14,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 7232 transitions. [2021-06-06 00:11:14,260 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 7232 transitions. Word has length 26 [2021-06-06 00:11:14,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:14,260 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 7232 transitions. [2021-06-06 00:11:14,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:14,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 7232 transitions. [2021-06-06 00:11:14,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:14,264 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:14,264 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, 1, 1, 1] [2021-06-06 00:11:14,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2426,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:14,477 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:14,477 INFO L82 PathProgramCache]: Analyzing trace with hash -505799277, now seen corresponding path program 30 times [2021-06-06 00:11:14,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:14,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122801482] [2021-06-06 00:11:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:14,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:14,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122801482] [2021-06-06 00:11:14,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122801482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:14,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638270968] [2021-06-06 00:11:14,649 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 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 [2021-06-06 00:11:14,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:11:14,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:14,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:11:14,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:15,067 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:15,067 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 30 treesize of output 28 [2021-06-06 00:11:15,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,089 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:15,090 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 28 [2021-06-06 00:11:15,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,109 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:11:15,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 21 [2021-06-06 00:11:15,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,120 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:15,120 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 28 treesize of output 16 [2021-06-06 00:11:15,120 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:15,136 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 16 treesize of output 26 [2021-06-06 00:11:15,140 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,149 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:15,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:11:15,150 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,159 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:15,160 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 33 treesize of output 19 [2021-06-06 00:11:15,160 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,179 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:15,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 25 [2021-06-06 00:11:15,183 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,197 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-06 00:11:15,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 19 [2021-06-06 00:11:15,198 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,207 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:15,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:11:15,208 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,217 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:15,218 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 33 treesize of output 19 [2021-06-06 00:11:15,218 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,236 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-06 00:11:15,236 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 30 treesize of output 23 [2021-06-06 00:11:15,237 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,246 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:15,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:11:15,247 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,256 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:15,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:11:15,257 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,266 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:15,266 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 33 treesize of output 19 [2021-06-06 00:11:15,266 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,273 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:15,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:11:15,274 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:15,469 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-06-06 00:11:15,469 INFO L628 ElimStorePlain]: treesize reduction 43, result has 79.1 percent of original size [2021-06-06 00:11:15,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-06 00:11:15,472 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:729, output treesize:157 [2021-06-06 00:11:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:15,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638270968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:15,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:15,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-06 00:11:15,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418156513] [2021-06-06 00:11:15,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:11:15,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:15,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:11:15,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:11:15,617 INFO L87 Difference]: Start difference. First operand 2096 states and 7232 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:16,248 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-06 00:11:16,554 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-06-06 00:11:17,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:17,182 INFO L93 Difference]: Finished difference Result 2796 states and 9280 transitions. [2021-06-06 00:11:17,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:11:17,182 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:17,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:17,186 INFO L225 Difference]: With dead ends: 2796 [2021-06-06 00:11:17,186 INFO L226 Difference]: Without dead ends: 2751 [2021-06-06 00:11:17,186 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1577.1ms TimeCoverageRelationStatistics Valid=241, Invalid=1481, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:11:17,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-06-06 00:11:17,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2123. [2021-06-06 00:11:17,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 3.4542884071630535) internal successors, (7330), 2122 states have internal predecessors, (7330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 7330 transitions. [2021-06-06 00:11:17,214 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 7330 transitions. Word has length 26 [2021-06-06 00:11:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:17,214 INFO L482 AbstractCegarLoop]: Abstraction has 2123 states and 7330 transitions. [2021-06-06 00:11:17,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 7330 transitions. [2021-06-06 00:11:17,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:17,216 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:17,216 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:17,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2461 [2021-06-06 00:11:17,417 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:17,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:17,417 INFO L82 PathProgramCache]: Analyzing trace with hash 266862281, now seen corresponding path program 31 times [2021-06-06 00:11:17,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:17,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426877068] [2021-06-06 00:11:17,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:17,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:17,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426877068] [2021-06-06 00:11:17,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426877068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:17,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370601801] [2021-06-06 00:11:17,693 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 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 [2021-06-06 00:11:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:17,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:11:17,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:17,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:17,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:17,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:17,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-06-06 00:11:17,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:17,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:17,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:17,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:17,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-06-06 00:11:17,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:17,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:17,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:17,972 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:17,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 26 [2021-06-06 00:11:17,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:17,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:17,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:17,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:17,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-06-06 00:11:17,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:17,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:17,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,000 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:18,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:11:18,000 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:18,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,010 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:18,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-06 00:11:18,011 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:18,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,022 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:18,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 1 [2021-06-06 00:11:18,023 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:18,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,032 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:18,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-06 00:11:18,034 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:18,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,044 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:18,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-06-06 00:11:18,045 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:18,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,054 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:18,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-06-06 00:11:18,055 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:18,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,064 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:18,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-06-06 00:11:18,065 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:18,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,074 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:18,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-06 00:11:18,075 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:18,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,087 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:18,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-06-06 00:11:18,088 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:18,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,098 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:18,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 23 [2021-06-06 00:11:18,099 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:18,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,110 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:18,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2021-06-06 00:11:18,111 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:18,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:18,118 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:18,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 1 [2021-06-06 00:11:18,119 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:18,243 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-06-06 00:11:18,243 INFO L628 ElimStorePlain]: treesize reduction 47, result has 69.3 percent of original size [2021-06-06 00:11:18,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:11:18,244 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:821, output treesize:106 [2021-06-06 00:11:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:18,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370601801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:18,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:18,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:11:18,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925965210] [2021-06-06 00:11:18,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:11:18,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:18,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:11:18,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:11:18,356 INFO L87 Difference]: Start difference. First operand 2123 states and 7330 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:19,669 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-06-06 00:11:20,083 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-06 00:11:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:20,248 INFO L93 Difference]: Finished difference Result 2903 states and 9622 transitions. [2021-06-06 00:11:20,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:11:20,248 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:20,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:20,252 INFO L225 Difference]: With dead ends: 2903 [2021-06-06 00:11:20,252 INFO L226 Difference]: Without dead ends: 2858 [2021-06-06 00:11:20,252 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1863.5ms TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:11:20,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-06-06 00:11:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2119. [2021-06-06 00:11:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.453257790368272) internal successors, (7314), 2118 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7314 transitions. [2021-06-06 00:11:20,279 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7314 transitions. Word has length 26 [2021-06-06 00:11:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:20,279 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 7314 transitions. [2021-06-06 00:11:20,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7314 transitions. [2021-06-06 00:11:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:20,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:20,282 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, 1, 1, 1] [2021-06-06 00:11:20,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2509,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:20,485 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:20,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:20,485 INFO L82 PathProgramCache]: Analyzing trace with hash -176639705, now seen corresponding path program 32 times [2021-06-06 00:11:20,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:20,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956754808] [2021-06-06 00:11:20,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:20,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:20,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956754808] [2021-06-06 00:11:20,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956754808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:20,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264629084] [2021-06-06 00:11:20,661 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 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 [2021-06-06 00:11:20,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:11:20,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:20,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:11:20,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:21,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:21,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:21,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:21,181 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 30 treesize of output 16 [2021-06-06 00:11:21,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:21,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:21,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:21,186 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 30 treesize of output 13 [2021-06-06 00:11:21,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:21,269 INFO L628 ElimStorePlain]: treesize reduction 117, result has 42.9 percent of original size [2021-06-06 00:11:21,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:21,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:21,274 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 21 treesize of output 13 [2021-06-06 00:11:21,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:21,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:21,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:21,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:11:21,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:21,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:21,357 INFO L518 ElimStorePlain]: Eliminatee v_prenex_278 vanished before elimination [2021-06-06 00:11:21,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:11:21,359 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:265, output treesize:24 [2021-06-06 00:11:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:21,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264629084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:21,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:21,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:11:21,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107333927] [2021-06-06 00:11:21,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:11:21,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:21,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:11:21,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:11:21,403 INFO L87 Difference]: Start difference. First operand 2119 states and 7314 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:22,492 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-06-06 00:11:22,658 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-06-06 00:11:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:22,765 INFO L93 Difference]: Finished difference Result 2789 states and 9380 transitions. [2021-06-06 00:11:22,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:11:22,765 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:22,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:22,769 INFO L225 Difference]: With dead ends: 2789 [2021-06-06 00:11:22,769 INFO L226 Difference]: Without dead ends: 2774 [2021-06-06 00:11:22,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1385.4ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:11:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2774 states. [2021-06-06 00:11:22,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2774 to 2117. [2021-06-06 00:11:22,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 3.452741020793951) internal successors, (7306), 2116 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 7306 transitions. [2021-06-06 00:11:22,795 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 7306 transitions. Word has length 26 [2021-06-06 00:11:22,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:22,795 INFO L482 AbstractCegarLoop]: Abstraction has 2117 states and 7306 transitions. [2021-06-06 00:11:22,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 7306 transitions. [2021-06-06 00:11:22,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:22,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:22,798 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, 1, 1, 1] [2021-06-06 00:11:22,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2528 [2021-06-06 00:11:22,998 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:22,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:22,999 INFO L82 PathProgramCache]: Analyzing trace with hash -344448797, now seen corresponding path program 33 times [2021-06-06 00:11:22,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:22,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031075077] [2021-06-06 00:11:22,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:23,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:23,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031075077] [2021-06-06 00:11:23,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031075077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:23,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026850718] [2021-06-06 00:11:23,192 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 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 [2021-06-06 00:11:23,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:11:23,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:23,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:11:23,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:23,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:23,526 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:23,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:11:23,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:23,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:23,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:23,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:11:23,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:23,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:23,549 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:23,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:11:23,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:23,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:23,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:23,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:11:23,564 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:23,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:23,572 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:23,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:11:23,573 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:23,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:23,581 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:23,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:11:23,582 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:23,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:23,590 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:23,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:11:23,591 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:23,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:23,602 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:23,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:11:23,604 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:23,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:23,612 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:23,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:11:23,613 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:23,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:23,625 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:23,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-06 00:11:23,626 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:23,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:23,637 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:23,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-06 00:11:23,638 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:23,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:23,646 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:23,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:11:23,647 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:23,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:23,658 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:23,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-06 00:11:23,660 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:23,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:23,668 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:23,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:11:23,669 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:23,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:23,677 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:23,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:11:23,678 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:23,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:23,683 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:23,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:11:23,684 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:23,770 INFO L628 ElimStorePlain]: treesize reduction 44, result has 67.9 percent of original size [2021-06-06 00:11:23,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:11:23,772 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:75 [2021-06-06 00:11:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:23,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026850718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:23,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:23,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-06 00:11:23,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705097216] [2021-06-06 00:11:23,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:11:23,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:23,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:11:23,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:11:23,853 INFO L87 Difference]: Start difference. First operand 2117 states and 7306 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:24,289 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-06 00:11:24,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:24,810 INFO L93 Difference]: Finished difference Result 2583 states and 8714 transitions. [2021-06-06 00:11:24,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:11:24,811 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:24,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:24,814 INFO L225 Difference]: With dead ends: 2583 [2021-06-06 00:11:24,814 INFO L226 Difference]: Without dead ends: 2568 [2021-06-06 00:11:24,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 997.9ms TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:11:24,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-06-06 00:11:24,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2111. [2021-06-06 00:11:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2110 states have (on average 3.4526066350710902) internal successors, (7285), 2110 states have internal predecessors, (7285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:24,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 7285 transitions. [2021-06-06 00:11:24,845 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 7285 transitions. Word has length 26 [2021-06-06 00:11:24,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:24,845 INFO L482 AbstractCegarLoop]: Abstraction has 2111 states and 7285 transitions. [2021-06-06 00:11:24,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:24,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 7285 transitions. [2021-06-06 00:11:24,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:24,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:24,849 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:25,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2548 [2021-06-06 00:11:25,071 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:25,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:25,071 INFO L82 PathProgramCache]: Analyzing trace with hash -129711505, now seen corresponding path program 34 times [2021-06-06 00:11:25,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:25,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621173801] [2021-06-06 00:11:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:25,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:25,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621173801] [2021-06-06 00:11:25,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621173801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:25,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252830542] [2021-06-06 00:11:25,365 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 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 [2021-06-06 00:11:25,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:11:25,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:25,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:11:25,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:25,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:25,967 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:25,967 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 35 treesize of output 31 [2021-06-06 00:11:25,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:25,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:25,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:25,987 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 35 treesize of output 35 [2021-06-06 00:11:25,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:26,363 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2021-06-06 00:11:26,363 INFO L628 ElimStorePlain]: treesize reduction 29, result has 93.3 percent of original size [2021-06-06 00:11:26,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:26,387 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:26,387 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 25 [2021-06-06 00:11:26,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:26,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:26,413 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:26,413 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 28 [2021-06-06 00:11:26,415 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:26,592 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-06 00:11:26,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:26,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:26,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:26,612 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 28 treesize of output 32 [2021-06-06 00:11:26,618 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:26,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:26,636 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:11:26,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:11:26,638 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:26,976 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-06-06 00:11:26,976 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.5 percent of original size [2021-06-06 00:11:26,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:26,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:26,993 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 16 treesize of output 26 [2021-06-06 00:11:26,998 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:27,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:27,015 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:11:27,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 21 [2021-06-06 00:11:27,017 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:27,164 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-06 00:11:27,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:27,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:27,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:27,182 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 30 treesize of output 32 [2021-06-06 00:11:27,186 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:27,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:27,203 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:11:27,203 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 30 treesize of output 24 [2021-06-06 00:11:27,204 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:27,469 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-06-06 00:11:27,469 INFO L628 ElimStorePlain]: treesize reduction 16, result has 94.8 percent of original size [2021-06-06 00:11:27,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-06 00:11:27,485 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 11 variables, input treesize:457, output treesize:259 [2021-06-06 00:11:27,670 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-06-06 00:11:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:27,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252830542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:27,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:27,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:11:27,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793524218] [2021-06-06 00:11:27,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:11:27,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:27,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:11:27,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:11:27,707 INFO L87 Difference]: Start difference. First operand 2111 states and 7285 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:27,934 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2021-06-06 00:11:28,241 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-06 00:11:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:28,671 INFO L93 Difference]: Finished difference Result 2792 states and 9404 transitions. [2021-06-06 00:11:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:11:28,671 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:28,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:28,675 INFO L225 Difference]: With dead ends: 2792 [2021-06-06 00:11:28,675 INFO L226 Difference]: Without dead ends: 2767 [2021-06-06 00:11:28,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1415.5ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:11:28,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2021-06-06 00:11:28,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 2092. [2021-06-06 00:11:28,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 3.4490674318507892) internal successors, (7212), 2091 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 7212 transitions. [2021-06-06 00:11:28,700 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 7212 transitions. Word has length 26 [2021-06-06 00:11:28,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:28,700 INFO L482 AbstractCegarLoop]: Abstraction has 2092 states and 7212 transitions. [2021-06-06 00:11:28,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:28,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 7212 transitions. [2021-06-06 00:11:28,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:28,702 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:28,703 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, 1, 1, 1] [2021-06-06 00:11:28,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2595 [2021-06-06 00:11:28,903 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:28,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:28,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1072305685, now seen corresponding path program 35 times [2021-06-06 00:11:28,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:28,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467078157] [2021-06-06 00:11:28,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:29,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:29,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467078157] [2021-06-06 00:11:29,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467078157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:29,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702905132] [2021-06-06 00:11:29,081 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 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 [2021-06-06 00:11:29,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:11:29,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:29,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:11:29,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:29,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,496 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 33 treesize of output 19 [2021-06-06 00:11:29,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:29,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:11:29,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:29,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:11:29,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:29,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,523 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 30 treesize of output 13 [2021-06-06 00:11:29,524 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:29,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,530 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 21 treesize of output 13 [2021-06-06 00:11:29,530 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:29,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:11:29,536 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:29,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-06 00:11:29,543 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:29,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,548 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 33 treesize of output 19 [2021-06-06 00:11:29,549 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:29,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,554 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 30 treesize of output 16 [2021-06-06 00:11:29,555 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:29,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,560 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 28 treesize of output 16 [2021-06-06 00:11:29,561 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:29,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,566 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 28 treesize of output 16 [2021-06-06 00:11:29,567 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:29,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:11:29,573 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:29,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,578 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 26 treesize of output 13 [2021-06-06 00:11:29,579 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:29,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,583 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 21 treesize of output 13 [2021-06-06 00:11:29,584 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:29,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:29,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:29,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:11:29,588 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:29,608 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-06 00:11:29,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:11:29,609 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-06 00:11:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:29,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702905132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:29,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:29,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:11:29,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377082079] [2021-06-06 00:11:29,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:11:29,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:29,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:11:29,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:11:29,634 INFO L87 Difference]: Start difference. First operand 2092 states and 7212 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:30,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:30,445 INFO L93 Difference]: Finished difference Result 2658 states and 8951 transitions. [2021-06-06 00:11:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:11:30,445 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:30,449 INFO L225 Difference]: With dead ends: 2658 [2021-06-06 00:11:30,449 INFO L226 Difference]: Without dead ends: 2643 [2021-06-06 00:11:30,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 896.6ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:11:30,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-06-06 00:11:30,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2095. [2021-06-06 00:11:30,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2095 states, 2094 states have (on average 3.451289398280802) internal successors, (7227), 2094 states have internal predecessors, (7227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:30,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2095 states to 2095 states and 7227 transitions. [2021-06-06 00:11:30,474 INFO L78 Accepts]: Start accepts. Automaton has 2095 states and 7227 transitions. Word has length 26 [2021-06-06 00:11:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:30,474 INFO L482 AbstractCegarLoop]: Abstraction has 2095 states and 7227 transitions. [2021-06-06 00:11:30,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:30,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2095 states and 7227 transitions. [2021-06-06 00:11:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:30,476 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:30,476 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:30,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2668,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:30,677 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:30,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:30,677 INFO L82 PathProgramCache]: Analyzing trace with hash 987336491, now seen corresponding path program 36 times [2021-06-06 00:11:30,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:30,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329839147] [2021-06-06 00:11:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:30,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:30,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329839147] [2021-06-06 00:11:30,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329839147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:30,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958329738] [2021-06-06 00:11:30,849 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 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 [2021-06-06 00:11:30,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:11:30,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:30,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:11:30,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:31,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,066 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:31,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:11:31,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:31,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,075 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:31,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:11:31,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:31,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,086 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:31,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:11:31,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:31,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,099 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:31,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:11:31,101 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:31,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,109 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:31,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:11:31,110 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:31,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:31,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:11:31,121 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:31,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,130 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:31,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:11:31,131 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:31,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,158 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:31,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-06 00:11:31,159 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:31,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:31,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:11:31,171 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:31,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,180 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:31,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:11:31,181 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:31,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,188 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:31,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:11:31,189 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:31,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,197 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:31,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:11:31,198 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:31,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,205 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:31,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:11:31,206 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:31,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,214 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:31,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:11:31,215 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:31,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,222 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:31,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:11:31,223 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:31,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:31,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:31,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:11:31,233 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:31,299 INFO L628 ElimStorePlain]: treesize reduction 55, result has 55.6 percent of original size [2021-06-06 00:11:31,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:11:31,301 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:569, output treesize:69 [2021-06-06 00:11:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:31,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958329738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:31,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:31,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:11:31,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002283558] [2021-06-06 00:11:31,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:11:31,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:31,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:11:31,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:11:31,393 INFO L87 Difference]: Start difference. First operand 2095 states and 7227 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:32,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:32,402 INFO L93 Difference]: Finished difference Result 2926 states and 9825 transitions. [2021-06-06 00:11:32,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:11:32,402 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:32,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:32,406 INFO L225 Difference]: With dead ends: 2926 [2021-06-06 00:11:32,406 INFO L226 Difference]: Without dead ends: 2911 [2021-06-06 00:11:32,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1068.3ms TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:11:32,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-06-06 00:11:32,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2092. [2021-06-06 00:11:32,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 3.4490674318507892) internal successors, (7212), 2091 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 7212 transitions. [2021-06-06 00:11:32,433 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 7212 transitions. Word has length 26 [2021-06-06 00:11:32,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:32,433 INFO L482 AbstractCegarLoop]: Abstraction has 2092 states and 7212 transitions. [2021-06-06 00:11:32,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:32,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 7212 transitions. [2021-06-06 00:11:32,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:32,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:32,435 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:32,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2712,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:32,636 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:32,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:32,636 INFO L82 PathProgramCache]: Analyzing trace with hash -941341329, now seen corresponding path program 37 times [2021-06-06 00:11:32,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:32,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495716415] [2021-06-06 00:11:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:32,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:32,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495716415] [2021-06-06 00:11:32,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495716415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:32,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882619671] [2021-06-06 00:11:32,764 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 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 [2021-06-06 00:11:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:32,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:11:32,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:33,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:33,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:33,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:33,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:11:33,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:33,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:33,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:33,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-06 00:11:33,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:33,157 INFO L628 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2021-06-06 00:11:33,158 INFO L518 ElimStorePlain]: Eliminatee v_prenex_291 vanished before elimination [2021-06-06 00:11:33,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:33,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:33,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:11:33,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:33,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:33,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:33,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:33,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:11:33,190 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:33,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:33,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:11:33,212 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:244, output treesize:31 [2021-06-06 00:11:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:33,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882619671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:33,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:33,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:11:33,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067399590] [2021-06-06 00:11:33,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:11:33,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:33,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:11:33,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:11:33,250 INFO L87 Difference]: Start difference. First operand 2092 states and 7212 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:33,777 INFO L93 Difference]: Finished difference Result 2732 states and 9177 transitions. [2021-06-06 00:11:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:11:33,778 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:33,781 INFO L225 Difference]: With dead ends: 2732 [2021-06-06 00:11:33,781 INFO L226 Difference]: Without dead ends: 2702 [2021-06-06 00:11:33,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 614.8ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:11:33,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2702 states. [2021-06-06 00:11:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2702 to 2096. [2021-06-06 00:11:33,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 3.452505966587112) internal successors, (7233), 2095 states have internal predecessors, (7233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:33,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 7233 transitions. [2021-06-06 00:11:33,807 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 7233 transitions. Word has length 26 [2021-06-06 00:11:33,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:33,807 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 7233 transitions. [2021-06-06 00:11:33,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:33,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 7233 transitions. [2021-06-06 00:11:33,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:33,809 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:33,810 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, 1, 1, 1] [2021-06-06 00:11:34,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2726 [2021-06-06 00:11:34,010 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:34,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:34,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1403214703, now seen corresponding path program 38 times [2021-06-06 00:11:34,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:34,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616596228] [2021-06-06 00:11:34,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:34,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:34,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616596228] [2021-06-06 00:11:34,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616596228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:34,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101873090] [2021-06-06 00:11:34,185 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 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 [2021-06-06 00:11:34,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:11:34,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:34,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:11:34,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:34,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:34,695 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:34,695 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 30 treesize of output 28 [2021-06-06 00:11:34,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:34,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:34,719 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:34,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-06 00:11:34,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:34,857 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-06 00:11:34,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:34,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:34,879 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:11:34,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 21 [2021-06-06 00:11:34,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:34,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:34,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:34,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-06 00:11:34,900 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:35,025 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-06 00:11:35,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:35,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:35,047 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:35,047 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 25 [2021-06-06 00:11:35,051 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:35,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:35,070 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:35,071 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 28 [2021-06-06 00:11:35,072 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:35,192 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-06 00:11:35,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:35,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:35,213 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:11:35,213 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 30 treesize of output 24 [2021-06-06 00:11:35,214 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:35,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:35,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:35,228 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 30 treesize of output 32 [2021-06-06 00:11:35,233 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:35,351 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-06 00:11:35,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:35,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:11:35,370 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:241 [2021-06-06 00:11:35,559 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-06-06 00:11:35,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:35,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101873090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:35,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:35,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:11:35,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653100888] [2021-06-06 00:11:35,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:11:35,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:35,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:11:35,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:11:35,596 INFO L87 Difference]: Start difference. First operand 2096 states and 7233 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:36,000 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-06-06 00:11:36,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:36,350 INFO L93 Difference]: Finished difference Result 2726 states and 9219 transitions. [2021-06-06 00:11:36,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:11:36,350 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:36,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:36,354 INFO L225 Difference]: With dead ends: 2726 [2021-06-06 00:11:36,354 INFO L226 Difference]: Without dead ends: 2711 [2021-06-06 00:11:36,355 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1036.4ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:11:36,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-06-06 00:11:36,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2120. [2021-06-06 00:11:36,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.4502123643227938) internal successors, (7311), 2119 states have internal predecessors, (7311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:36,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7311 transitions. [2021-06-06 00:11:36,381 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7311 transitions. Word has length 26 [2021-06-06 00:11:36,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:36,381 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7311 transitions. [2021-06-06 00:11:36,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:36,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7311 transitions. [2021-06-06 00:11:36,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:36,383 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:36,383 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:36,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2740 [2021-06-06 00:11:36,584 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:36,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:36,584 INFO L82 PathProgramCache]: Analyzing trace with hash -2092411309, now seen corresponding path program 39 times [2021-06-06 00:11:36,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:36,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941781692] [2021-06-06 00:11:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:36,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:36,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941781692] [2021-06-06 00:11:36,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941781692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:36,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908885025] [2021-06-06 00:11:36,877 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 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 [2021-06-06 00:11:36,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:11:36,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:36,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:11:36,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:37,268 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-06 00:11:37,452 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2021-06-06 00:11:37,525 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_312, v_prenex_313]} [2021-06-06 00:11:37,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:37,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:11:37,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:37,600 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-06-06 00:11:37,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:37,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:37,604 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 23 treesize of output 13 [2021-06-06 00:11:37,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:37,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:37,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:37,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:37,632 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 23 treesize of output 13 [2021-06-06 00:11:37,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:37,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:37,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:11:37,655 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:22 [2021-06-06 00:11:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:37,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908885025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:37,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:37,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:11:37,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573849257] [2021-06-06 00:11:37,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:11:37,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:37,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:11:37,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:11:37,691 INFO L87 Difference]: Start difference. First operand 2120 states and 7311 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:38,462 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-06 00:11:38,676 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2021-06-06 00:11:38,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:38,867 INFO L93 Difference]: Finished difference Result 2785 states and 9315 transitions. [2021-06-06 00:11:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:11:38,867 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:38,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:38,871 INFO L225 Difference]: With dead ends: 2785 [2021-06-06 00:11:38,871 INFO L226 Difference]: Without dead ends: 2740 [2021-06-06 00:11:38,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1415.9ms TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:11:38,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-06-06 00:11:38,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 2156. [2021-06-06 00:11:38,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 3.451508120649652) internal successors, (7438), 2155 states have internal predecessors, (7438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:38,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 7438 transitions. [2021-06-06 00:11:38,897 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 7438 transitions. Word has length 26 [2021-06-06 00:11:38,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:38,897 INFO L482 AbstractCegarLoop]: Abstraction has 2156 states and 7438 transitions. [2021-06-06 00:11:38,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:38,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 7438 transitions. [2021-06-06 00:11:38,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:38,900 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:38,900 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:39,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2803 [2021-06-06 00:11:39,100 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:39,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:39,101 INFO L82 PathProgramCache]: Analyzing trace with hash 585023207, now seen corresponding path program 40 times [2021-06-06 00:11:39,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:39,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158002051] [2021-06-06 00:11:39,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:39,382 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-06-06 00:11:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:39,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:39,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158002051] [2021-06-06 00:11:39,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158002051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:39,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591182369] [2021-06-06 00:11:39,447 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 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 [2021-06-06 00:11:39,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:11:39,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:39,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:11:39,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:39,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:39,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-06-06 00:11:39,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:39,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:39,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-06-06 00:11:39,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:39,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,716 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:39,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 26 [2021-06-06 00:11:39,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:39,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:39,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-06-06 00:11:39,733 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:39,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,743 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:39,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:11:39,744 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:39,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,754 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:39,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-06 00:11:39,755 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:39,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,766 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:39,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 1 [2021-06-06 00:11:39,767 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:39,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,777 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:39,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-06 00:11:39,778 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:39,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,789 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:39,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-06-06 00:11:39,790 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:39,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,799 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:39,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-06-06 00:11:39,800 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:39,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,809 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:39,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-06-06 00:11:39,810 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:39,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,819 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:39,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-06 00:11:39,820 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:39,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,832 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:39,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-06-06 00:11:39,834 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:39,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,843 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:39,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 23 [2021-06-06 00:11:39,845 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:39,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,856 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:39,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2021-06-06 00:11:39,857 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:39,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:39,864 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:39,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 1 [2021-06-06 00:11:39,865 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:39,987 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-06-06 00:11:39,988 INFO L628 ElimStorePlain]: treesize reduction 47, result has 69.3 percent of original size [2021-06-06 00:11:39,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:11:39,989 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:821, output treesize:106 [2021-06-06 00:11:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:40,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591182369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:40,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:40,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:11:40,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659919000] [2021-06-06 00:11:40,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:11:40,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:40,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:11:40,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:11:40,094 INFO L87 Difference]: Start difference. First operand 2156 states and 7438 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:41,122 INFO L93 Difference]: Finished difference Result 2977 states and 9961 transitions. [2021-06-06 00:11:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:11:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:41,127 INFO L225 Difference]: With dead ends: 2977 [2021-06-06 00:11:41,127 INFO L226 Difference]: Without dead ends: 2947 [2021-06-06 00:11:41,127 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1177.4ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:11:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2021-06-06 00:11:41,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2143. [2021-06-06 00:11:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.4495798319327733) internal successors, (7389), 2142 states have internal predecessors, (7389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:41,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7389 transitions. [2021-06-06 00:11:41,154 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7389 transitions. Word has length 26 [2021-06-06 00:11:41,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:41,154 INFO L482 AbstractCegarLoop]: Abstraction has 2143 states and 7389 transitions. [2021-06-06 00:11:41,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:41,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7389 transitions. [2021-06-06 00:11:41,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:41,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:41,157 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:41,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2816,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:41,357 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:41,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:41,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1104919697, now seen corresponding path program 41 times [2021-06-06 00:11:41,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:41,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319322033] [2021-06-06 00:11:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:41,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:41,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319322033] [2021-06-06 00:11:41,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319322033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:41,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803775367] [2021-06-06 00:11:41,612 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 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 [2021-06-06 00:11:41,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:11:41,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:41,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:11:41,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:42,009 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-06 00:11:42,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:42,140 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:42,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:11:42,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:42,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:42,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:42,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:11:42,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:42,470 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2021-06-06 00:11:42,470 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.6 percent of original size [2021-06-06 00:11:42,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:42,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:42,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:11:42,485 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:42,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:42,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:42,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:11:42,498 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:42,776 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-06-06 00:11:42,777 INFO L628 ElimStorePlain]: treesize reduction 4, result has 98.8 percent of original size [2021-06-06 00:11:42,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:42,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:42,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:11:42,792 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:42,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:42,803 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:42,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:11:42,804 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:42,932 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-06 00:11:42,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:42,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:42,946 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:42,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:11:42,947 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:42,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:42,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:42,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:11:42,960 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:43,078 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-06 00:11:43,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:43,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:43,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:43,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:11:43,094 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:43,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:43,104 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:43,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-06 00:11:43,105 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:43,208 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-06 00:11:43,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:43,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-06 00:11:43,215 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:411, output treesize:176 [2021-06-06 00:11:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:43,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803775367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:43,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:43,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:11:43,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351341548] [2021-06-06 00:11:43,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:11:43,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:43,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:11:43,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:11:43,354 INFO L87 Difference]: Start difference. First operand 2143 states and 7389 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:44,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:44,169 INFO L93 Difference]: Finished difference Result 2746 states and 9264 transitions. [2021-06-06 00:11:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:11:44,169 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:44,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:44,172 INFO L225 Difference]: With dead ends: 2746 [2021-06-06 00:11:44,173 INFO L226 Difference]: Without dead ends: 2721 [2021-06-06 00:11:44,173 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1044.3ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:11:44,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-06-06 00:11:44,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2147. [2021-06-06 00:11:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 3.449673811742777) internal successors, (7403), 2146 states have internal predecessors, (7403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 7403 transitions. [2021-06-06 00:11:44,197 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 7403 transitions. Word has length 26 [2021-06-06 00:11:44,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:44,198 INFO L482 AbstractCegarLoop]: Abstraction has 2147 states and 7403 transitions. [2021-06-06 00:11:44,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:44,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 7403 transitions. [2021-06-06 00:11:44,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:44,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:44,200 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:44,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2835,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:44,400 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:44,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:44,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1379621035, now seen corresponding path program 42 times [2021-06-06 00:11:44,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:44,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584244848] [2021-06-06 00:11:44,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:44,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:44,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584244848] [2021-06-06 00:11:44,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584244848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:44,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282466077] [2021-06-06 00:11:44,687 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 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 [2021-06-06 00:11:44,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:11:44,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:44,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:11:44,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:44,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:44,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:44,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:11:44,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:44,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:44,939 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:44,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:11:44,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:44,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:44,948 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:44,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:11:44,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:44,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:44,957 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:44,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:11:44,958 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:44,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:44,969 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:44,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-06-06 00:11:44,970 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:44,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:44,978 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:44,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:11:44,979 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:44,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:44,991 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:44,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:11:44,992 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:44,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:45,002 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:45,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-06-06 00:11:45,002 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:45,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:45,010 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:45,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:11:45,011 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:45,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:45,021 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:11:45,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:11:45,023 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:45,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:45,031 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:45,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:11:45,032 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:45,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:45,042 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:45,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:11:45,042 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:45,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:45,052 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:45,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:11:45,052 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:45,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:45,060 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:45,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:11:45,060 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:45,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:45,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:45,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:11:45,073 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:45,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:45,079 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:11:45,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:11:45,080 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:45,150 INFO L628 ElimStorePlain]: treesize reduction 15, result has 83.9 percent of original size [2021-06-06 00:11:45,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:11:45,151 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-06-06 00:11:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:45,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282466077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:45,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:45,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:11:45,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996163929] [2021-06-06 00:11:45,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:11:45,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:45,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:11:45,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:11:45,241 INFO L87 Difference]: Start difference. First operand 2147 states and 7403 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:45,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:45,976 INFO L93 Difference]: Finished difference Result 2702 states and 9149 transitions. [2021-06-06 00:11:45,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:11:45,977 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:45,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:45,981 INFO L225 Difference]: With dead ends: 2702 [2021-06-06 00:11:45,981 INFO L226 Difference]: Without dead ends: 2687 [2021-06-06 00:11:45,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 837.0ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:11:45,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-06-06 00:11:46,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 2153. [2021-06-06 00:11:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 3.451208178438662) internal successors, (7427), 2152 states have internal predecessors, (7427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 7427 transitions. [2021-06-06 00:11:46,020 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 7427 transitions. Word has length 26 [2021-06-06 00:11:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:46,020 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 7427 transitions. [2021-06-06 00:11:46,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 7427 transitions. [2021-06-06 00:11:46,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:46,022 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:46,023 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:46,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2873 [2021-06-06 00:11:46,223 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:46,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:46,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1044929515, now seen corresponding path program 55 times [2021-06-06 00:11:46,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:46,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179566682] [2021-06-06 00:11:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:46,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:46,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179566682] [2021-06-06 00:11:46,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179566682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:46,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558192583] [2021-06-06 00:11:46,417 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 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 [2021-06-06 00:11:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:46,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:11:46,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:46,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:46,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,898 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 39 treesize of output 13 [2021-06-06 00:11:46,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:46,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:46,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,906 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 30 treesize of output 16 [2021-06-06 00:11:46,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:46,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:46,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,913 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 41 treesize of output 16 [2021-06-06 00:11:46,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:46,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:46,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,921 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 37 treesize of output 19 [2021-06-06 00:11:46,921 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:46,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:46,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,928 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 34 treesize of output 16 [2021-06-06 00:11:46,929 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:46,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:46,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,935 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 32 treesize of output 16 [2021-06-06 00:11:46,936 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:46,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:46,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,943 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 39 treesize of output 16 [2021-06-06 00:11:46,943 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:46,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:46,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,950 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 39 treesize of output 19 [2021-06-06 00:11:46,951 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:46,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:46,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,957 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 33 treesize of output 13 [2021-06-06 00:11:46,958 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:46,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:46,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,965 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 35 treesize of output 19 [2021-06-06 00:11:46,965 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:46,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:46,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,972 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 41 treesize of output 13 [2021-06-06 00:11:46,973 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:46,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:46,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,979 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 28 treesize of output 13 [2021-06-06 00:11:46,979 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:46,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:46,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,985 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 28 treesize of output 13 [2021-06-06 00:11:46,986 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:46,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:46,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,994 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 35 treesize of output 19 [2021-06-06 00:11:46,995 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:46,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:46,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:46,998 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 30 treesize of output 16 [2021-06-06 00:11:46,998 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:47,019 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-06 00:11:47,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:11:47,020 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-06 00:11:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:47,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558192583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:47,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:47,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:11:47,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443550161] [2021-06-06 00:11:47,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:11:47,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:47,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:11:47,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:11:47,043 INFO L87 Difference]: Start difference. First operand 2153 states and 7427 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:47,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:47,681 INFO L93 Difference]: Finished difference Result 2728 states and 8906 transitions. [2021-06-06 00:11:47,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:11:47,681 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:47,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:47,685 INFO L225 Difference]: With dead ends: 2728 [2021-06-06 00:11:47,685 INFO L226 Difference]: Without dead ends: 2691 [2021-06-06 00:11:47,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 655.0ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:11:47,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2021-06-06 00:11:47,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2175. [2021-06-06 00:11:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2174 states have (on average 3.4498620055197793) internal successors, (7500), 2174 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:47,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 7500 transitions. [2021-06-06 00:11:47,725 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 7500 transitions. Word has length 26 [2021-06-06 00:11:47,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:47,725 INFO L482 AbstractCegarLoop]: Abstraction has 2175 states and 7500 transitions. [2021-06-06 00:11:47,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:47,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 7500 transitions. [2021-06-06 00:11:47,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:47,727 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:47,728 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:47,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2892 [2021-06-06 00:11:47,928 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:47,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:47,929 INFO L82 PathProgramCache]: Analyzing trace with hash 2112804079, now seen corresponding path program 56 times [2021-06-06 00:11:47,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:47,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812485529] [2021-06-06 00:11:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:48,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:48,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812485529] [2021-06-06 00:11:48,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812485529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:48,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259093070] [2021-06-06 00:11:48,131 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 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 [2021-06-06 00:11:48,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:11:48,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:48,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:11:48,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:48,429 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_328, v_prenex_324], 5=[A, v_prenex_326]} [2021-06-06 00:11:48,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:48,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:48,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:48,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:48,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:11:48,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:48,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:48,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:48,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:48,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:11:48,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:48,557 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-06 00:11:48,557 INFO L628 ElimStorePlain]: treesize reduction 130, result has 40.1 percent of original size [2021-06-06 00:11:48,557 INFO L518 ElimStorePlain]: Eliminatee v_prenex_324 vanished before elimination [2021-06-06 00:11:48,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:48,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:48,561 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 29 treesize of output 13 [2021-06-06 00:11:48,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:48,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:48,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:48,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:48,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:48,589 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 25 treesize of output 13 [2021-06-06 00:11:48,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:48,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:48,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:11:48,611 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:31 [2021-06-06 00:11:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:48,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259093070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:48,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:48,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:11:48,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821852836] [2021-06-06 00:11:48,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:11:48,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:48,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:11:48,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:11:48,649 INFO L87 Difference]: Start difference. First operand 2175 states and 7500 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:49,632 INFO L93 Difference]: Finished difference Result 2675 states and 8982 transitions. [2021-06-06 00:11:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:11:49,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:49,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:49,636 INFO L225 Difference]: With dead ends: 2675 [2021-06-06 00:11:49,636 INFO L226 Difference]: Without dead ends: 2629 [2021-06-06 00:11:49,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 945.6ms TimeCoverageRelationStatistics Valid=297, Invalid=1035, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:11:49,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2021-06-06 00:11:49,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 2171. [2021-06-06 00:11:49,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2170 states have (on average 3.4442396313364054) internal successors, (7474), 2170 states have internal predecessors, (7474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 7474 transitions. [2021-06-06 00:11:49,661 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 7474 transitions. Word has length 26 [2021-06-06 00:11:49,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:49,661 INFO L482 AbstractCegarLoop]: Abstraction has 2171 states and 7474 transitions. [2021-06-06 00:11:49,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:49,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 7474 transitions. [2021-06-06 00:11:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:49,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:49,664 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:49,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2994,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:11:49,864 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:49,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:49,865 INFO L82 PathProgramCache]: Analyzing trace with hash 455537647, now seen corresponding path program 57 times [2021-06-06 00:11:49,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:49,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838122535] [2021-06-06 00:11:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:50,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:50,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838122535] [2021-06-06 00:11:50,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838122535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:50,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999449392] [2021-06-06 00:11:50,187 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 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 [2021-06-06 00:11:50,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:11:50,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:50,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:11:50,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:50,595 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_333, v_prenex_335], 5=[A, v_prenex_334]} [2021-06-06 00:11:50,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:50,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:50,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:50,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:11:50,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:50,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:50,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:50,608 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 23 treesize of output 13 [2021-06-06 00:11:50,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:50,704 INFO L628 ElimStorePlain]: treesize reduction 143, result has 42.8 percent of original size [2021-06-06 00:11:50,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:50,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-06 00:11:50,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:50,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:50,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:50,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:50,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-06 00:11:50,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:50,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:50,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:50,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:50,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:50,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:50,772 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 25 treesize of output 13 [2021-06-06 00:11:50,773 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:50,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:50,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:11:50,797 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:303, output treesize:24 [2021-06-06 00:11:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:50,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999449392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:50,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:50,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:11:50,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146577372] [2021-06-06 00:11:50,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:11:50,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:50,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:11:50,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:11:50,836 INFO L87 Difference]: Start difference. First operand 2171 states and 7474 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:51,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:51,511 INFO L93 Difference]: Finished difference Result 2624 states and 8866 transitions. [2021-06-06 00:11:51,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:11:51,512 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:51,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:51,515 INFO L225 Difference]: With dead ends: 2624 [2021-06-06 00:11:51,515 INFO L226 Difference]: Without dead ends: 2609 [2021-06-06 00:11:51,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 880.5ms TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:11:51,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-06-06 00:11:51,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 2181. [2021-06-06 00:11:51,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 3.445412844036697) internal successors, (7511), 2180 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:51,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 7511 transitions. [2021-06-06 00:11:51,541 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 7511 transitions. Word has length 26 [2021-06-06 00:11:51,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:51,541 INFO L482 AbstractCegarLoop]: Abstraction has 2181 states and 7511 transitions. [2021-06-06 00:11:51,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:51,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 7511 transitions. [2021-06-06 00:11:51,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:51,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:51,543 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:51,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3008 [2021-06-06 00:11:51,744 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:51,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:51,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1197737873, now seen corresponding path program 43 times [2021-06-06 00:11:51,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:51,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173177652] [2021-06-06 00:11:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:52,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:52,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173177652] [2021-06-06 00:11:52,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173177652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:52,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143533521] [2021-06-06 00:11:52,052 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 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 [2021-06-06 00:11:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:52,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:11:52,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:52,435 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_338], 2=[A, v_prenex_336]} [2021-06-06 00:11:52,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:52,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-06 00:11:52,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:52,534 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-06-06 00:11:52,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:52,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:52,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:11:52,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:52,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:52,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:52,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:52,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:52,583 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 30 treesize of output 16 [2021-06-06 00:11:52,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:52,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:52,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:11:52,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:52,633 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-06-06 00:11:52,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:11:52,635 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:25 [2021-06-06 00:11:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:52,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143533521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:52,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:52,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:11:52,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521501305] [2021-06-06 00:11:52,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:11:52,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:52,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:11:52,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:11:52,675 INFO L87 Difference]: Start difference. First operand 2181 states and 7511 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:53,398 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-06 00:11:53,541 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-06 00:11:53,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:53,717 INFO L93 Difference]: Finished difference Result 2827 states and 9420 transitions. [2021-06-06 00:11:53,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:11:53,717 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:53,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:53,721 INFO L225 Difference]: With dead ends: 2827 [2021-06-06 00:11:53,722 INFO L226 Difference]: Without dead ends: 2797 [2021-06-06 00:11:53,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1231.4ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:11:53,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-06-06 00:11:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2189. [2021-06-06 00:11:53,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 3.4437842778793417) internal successors, (7535), 2188 states have internal predecessors, (7535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:53,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 7535 transitions. [2021-06-06 00:11:53,751 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 7535 transitions. Word has length 26 [2021-06-06 00:11:53,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:53,751 INFO L482 AbstractCegarLoop]: Abstraction has 2189 states and 7535 transitions. [2021-06-06 00:11:53,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:53,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 7535 transitions. [2021-06-06 00:11:53,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:53,753 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:53,753 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:11:53,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3023 [2021-06-06 00:11:53,955 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:53,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:53,955 INFO L82 PathProgramCache]: Analyzing trace with hash 352643691, now seen corresponding path program 58 times [2021-06-06 00:11:53,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:53,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919546188] [2021-06-06 00:11:53,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:54,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:54,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919546188] [2021-06-06 00:11:54,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919546188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:54,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891229700] [2021-06-06 00:11:54,112 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 [2021-06-06 00:11:54,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:11:54,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:54,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:11:54,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:54,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,636 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 35 treesize of output 19 [2021-06-06 00:11:54,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:54,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,644 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 33 treesize of output 13 [2021-06-06 00:11:54,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:54,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,652 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:11:54,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:54,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,661 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 28 treesize of output 13 [2021-06-06 00:11:54,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:54,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,668 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 28 treesize of output 13 [2021-06-06 00:11:54,669 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:54,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,676 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 35 treesize of output 19 [2021-06-06 00:11:54,676 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:54,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,684 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 30 treesize of output 16 [2021-06-06 00:11:54,685 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:54,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,692 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 41 treesize of output 16 [2021-06-06 00:11:54,693 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:54,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,700 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 32 treesize of output 16 [2021-06-06 00:11:54,701 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:54,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,708 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 39 treesize of output 16 [2021-06-06 00:11:54,709 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:54,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,717 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 39 treesize of output 13 [2021-06-06 00:11:54,718 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:54,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,725 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 41 treesize of output 13 [2021-06-06 00:11:54,726 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:54,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,733 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 39 treesize of output 19 [2021-06-06 00:11:54,733 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:54,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,740 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 30 treesize of output 16 [2021-06-06 00:11:54,741 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:54,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:11:54,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:11:54,744 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 34 treesize of output 16 [2021-06-06 00:11:54,745 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:54,765 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-06 00:11:54,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:11:54,766 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-06 00:11:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:54,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891229700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:54,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:54,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-06 00:11:54,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544542292] [2021-06-06 00:11:54,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:11:54,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:54,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:11:54,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:11:54,790 INFO L87 Difference]: Start difference. First operand 2189 states and 7535 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:55,699 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-06-06 00:11:55,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:11:55,945 INFO L93 Difference]: Finished difference Result 3223 states and 10393 transitions. [2021-06-06 00:11:55,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:11:55,945 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:11:55,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:11:55,950 INFO L225 Difference]: With dead ends: 3223 [2021-06-06 00:11:55,950 INFO L226 Difference]: Without dead ends: 3186 [2021-06-06 00:11:55,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1076.8ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:11:55,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2021-06-06 00:11:55,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 2237. [2021-06-06 00:11:55,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 3.4485688729874777) internal successors, (7711), 2236 states have internal predecessors, (7711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:55,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 7711 transitions. [2021-06-06 00:11:55,982 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 7711 transitions. Word has length 26 [2021-06-06 00:11:55,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:11:55,982 INFO L482 AbstractCegarLoop]: Abstraction has 2237 states and 7711 transitions. [2021-06-06 00:11:55,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:55,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 7711 transitions. [2021-06-06 00:11:55,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:11:55,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:11:55,985 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, 1, 1, 1] [2021-06-06 00:11:56,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3034 [2021-06-06 00:11:56,186 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:11:56,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:11:56,186 INFO L82 PathProgramCache]: Analyzing trace with hash 392132503, now seen corresponding path program 44 times [2021-06-06 00:11:56,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:11:56,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36352093] [2021-06-06 00:11:56,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:11:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:11:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:56,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:11:56,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36352093] [2021-06-06 00:11:56,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36352093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:56,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789691819] [2021-06-06 00:11:56,501 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 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 [2021-06-06 00:11:56,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:11:56,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:11:56,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:11:56,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:11:56,967 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-06 00:11:57,536 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:11:57,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:11:57,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:57,575 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:57,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:11:57,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:57,936 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 126 [2021-06-06 00:11:57,936 INFO L628 ElimStorePlain]: treesize reduction 74, result has 84.5 percent of original size [2021-06-06 00:11:57,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:57,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-06 00:11:57,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:58,122 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-06 00:11:58,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:58,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:58,145 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 30 treesize of output 32 [2021-06-06 00:11:58,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:58,161 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:11:58,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:11:58,162 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:58,305 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-06 00:11:58,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:58,330 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:58,331 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 28 treesize of output 28 [2021-06-06 00:11:58,335 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:58,474 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-06 00:11:58,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:58,501 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:58,501 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 30 treesize of output 28 [2021-06-06 00:11:58,505 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:58,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:58,523 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 30 treesize of output 32 [2021-06-06 00:11:58,525 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:58,762 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 107 [2021-06-06 00:11:58,763 INFO L628 ElimStorePlain]: treesize reduction 27, result has 91.1 percent of original size [2021-06-06 00:11:58,785 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:58,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 28 [2021-06-06 00:11:58,786 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:58,901 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-06 00:11:58,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:58,922 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:11:58,922 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 25 [2021-06-06 00:11:58,926 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:59,038 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-06 00:11:59,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:59,056 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:11:59,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:11:59,058 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:11:59,167 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-06 00:11:59,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:11:59,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:11:59,181 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:539, output treesize:412 [2021-06-06 00:11:59,348 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-06-06 00:11:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:11:59,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789691819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:11:59,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:11:59,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:11:59,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160025206] [2021-06-06 00:11:59,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:11:59,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:11:59,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:11:59,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:11:59,456 INFO L87 Difference]: Start difference. First operand 2237 states and 7711 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:11:59,898 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-06-06 00:12:00,616 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-06-06 00:12:01,203 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-06-06 00:12:01,641 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2021-06-06 00:12:02,071 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 96 [2021-06-06 00:12:02,320 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-06 00:12:02,938 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 107 [2021-06-06 00:12:03,461 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 89 [2021-06-06 00:12:04,213 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 108 [2021-06-06 00:12:04,426 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-06 00:12:05,047 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2021-06-06 00:12:05,257 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-06-06 00:12:05,630 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-06 00:12:06,088 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-06-06 00:12:06,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:06,315 INFO L93 Difference]: Finished difference Result 3399 states and 11009 transitions. [2021-06-06 00:12:06,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:12:06,315 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:12:06,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:06,320 INFO L225 Difference]: With dead ends: 3399 [2021-06-06 00:12:06,320 INFO L226 Difference]: Without dead ends: 3354 [2021-06-06 00:12:06,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 6621.0ms TimeCoverageRelationStatistics Valid=484, Invalid=2378, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:12:06,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2021-06-06 00:12:06,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 2260. [2021-06-06 00:12:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2259 states have (on average 3.454183266932271) internal successors, (7803), 2259 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:06,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 7803 transitions. [2021-06-06 00:12:06,351 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 7803 transitions. Word has length 26 [2021-06-06 00:12:06,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:06,351 INFO L482 AbstractCegarLoop]: Abstraction has 2260 states and 7803 transitions. [2021-06-06 00:12:06,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:06,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 7803 transitions. [2021-06-06 00:12:06,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:06,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:06,354 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, 1, 1, 1] [2021-06-06 00:12:06,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3124,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:06,554 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:06,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:06,555 INFO L82 PathProgramCache]: Analyzing trace with hash -658448197, now seen corresponding path program 45 times [2021-06-06 00:12:06,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:06,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170503394] [2021-06-06 00:12:06,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:06,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:06,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170503394] [2021-06-06 00:12:06,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170503394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:06,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536763395] [2021-06-06 00:12:06,824 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 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 [2021-06-06 00:12:06,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:12:06,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:06,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:12:06,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:07,097 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-06 00:12:07,266 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-06 00:12:07,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:07,386 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:12:07,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:12:07,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:07,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:07,414 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:12:07,414 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 33 treesize of output 31 [2021-06-06 00:12:07,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:07,827 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 156 [2021-06-06 00:12:07,827 INFO L628 ElimStorePlain]: treesize reduction 74, result has 85.2 percent of original size [2021-06-06 00:12:07,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:07,852 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:12:07,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:12:07,853 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:08,045 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-06 00:12:08,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:08,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:08,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:08,070 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 30 treesize of output 32 [2021-06-06 00:12:08,075 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:08,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:08,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:08,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-06 00:12:08,100 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:08,408 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 144 [2021-06-06 00:12:08,408 INFO L628 ElimStorePlain]: treesize reduction 49, result has 87.8 percent of original size [2021-06-06 00:12:08,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:08,434 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:12:08,434 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 30 treesize of output 24 [2021-06-06 00:12:08,435 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:08,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:08,460 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:12:08,460 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 30 treesize of output 28 [2021-06-06 00:12:08,461 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:08,712 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 138 [2021-06-06 00:12:08,713 INFO L628 ElimStorePlain]: treesize reduction 33, result has 90.0 percent of original size [2021-06-06 00:12:08,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:08,735 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:12:08,735 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 21 [2021-06-06 00:12:08,737 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:08,854 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-06 00:12:08,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:08,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:08,876 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:12:08,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 25 [2021-06-06 00:12:08,880 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:08,993 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-06 00:12:08,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:09,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:09,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:09,010 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 16 treesize of output 26 [2021-06-06 00:12:09,015 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:09,123 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-06 00:12:09,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:09,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:09,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:09,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-06 00:12:09,148 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:09,346 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 112 [2021-06-06 00:12:09,347 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.4 percent of original size [2021-06-06 00:12:09,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:12:09,363 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:563, output treesize:231 [2021-06-06 00:12:09,483 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-06-06 00:12:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:09,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536763395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:09,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:09,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:12:09,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619090632] [2021-06-06 00:12:09,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:12:09,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:09,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:12:09,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:12:09,523 INFO L87 Difference]: Start difference. First operand 2260 states and 7803 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:09,846 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-06-06 00:12:10,447 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-06 00:12:10,732 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 36 [2021-06-06 00:12:11,261 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-06-06 00:12:11,598 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 108 [2021-06-06 00:12:11,956 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-06-06 00:12:12,344 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 112 [2021-06-06 00:12:12,743 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-06-06 00:12:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:13,001 INFO L93 Difference]: Finished difference Result 3654 states and 11998 transitions. [2021-06-06 00:12:13,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:12:13,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:12:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:13,006 INFO L225 Difference]: With dead ends: 3654 [2021-06-06 00:12:13,006 INFO L226 Difference]: Without dead ends: 3624 [2021-06-06 00:12:13,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 3651.4ms TimeCoverageRelationStatistics Valid=385, Invalid=1255, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:12:13,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3624 states. [2021-06-06 00:12:13,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3624 to 2265. [2021-06-06 00:12:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2264 states have (on average 3.4487632508833923) internal successors, (7808), 2264 states have internal predecessors, (7808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:13,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 7808 transitions. [2021-06-06 00:12:13,039 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 7808 transitions. Word has length 26 [2021-06-06 00:12:13,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:13,039 INFO L482 AbstractCegarLoop]: Abstraction has 2265 states and 7808 transitions. [2021-06-06 00:12:13,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:13,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 7808 transitions. [2021-06-06 00:12:13,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:13,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:13,042 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:13,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3205,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:13,242 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:13,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:13,243 INFO L82 PathProgramCache]: Analyzing trace with hash 578637215, now seen corresponding path program 59 times [2021-06-06 00:12:13,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:13,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446161104] [2021-06-06 00:12:13,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:13,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:13,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446161104] [2021-06-06 00:12:13,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446161104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:13,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335876775] [2021-06-06 00:12:13,387 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 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 [2021-06-06 00:12:13,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:12:13,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:13,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:12:13,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:13,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:13,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,935 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 35 treesize of output 19 [2021-06-06 00:12:13,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:13,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:13,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,943 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 30 treesize of output 16 [2021-06-06 00:12:13,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:13,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:13,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,950 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 37 treesize of output 19 [2021-06-06 00:12:13,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:13,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:13,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,956 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 39 treesize of output 13 [2021-06-06 00:12:13,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:13,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:13,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,964 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 28 treesize of output 13 [2021-06-06 00:12:13,965 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:13,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:13,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,971 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 30 treesize of output 16 [2021-06-06 00:12:13,972 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:13,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:13,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,978 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 39 treesize of output 19 [2021-06-06 00:12:13,979 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:13,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:13,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,986 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 41 treesize of output 16 [2021-06-06 00:12:13,987 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:13,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:13,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,994 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 34 treesize of output 16 [2021-06-06 00:12:13,994 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:13,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:13,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:13,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,001 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 41 treesize of output 13 [2021-06-06 00:12:14,002 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:14,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:14,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,009 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 33 treesize of output 13 [2021-06-06 00:12:14,010 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:14,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:14,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,016 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 35 treesize of output 19 [2021-06-06 00:12:14,017 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:14,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:14,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,023 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 32 treesize of output 16 [2021-06-06 00:12:14,024 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:14,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:14,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,030 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 39 treesize of output 16 [2021-06-06 00:12:14,031 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:14,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:14,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:14,034 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 28 treesize of output 13 [2021-06-06 00:12:14,035 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:14,056 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-06 00:12:14,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:12:14,057 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-06 00:12:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:14,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335876775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:14,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:14,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:12:14,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477105225] [2021-06-06 00:12:14,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:12:14,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:14,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:12:14,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:12:14,085 INFO L87 Difference]: Start difference. First operand 2265 states and 7808 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:15,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:15,177 INFO L93 Difference]: Finished difference Result 3677 states and 11972 transitions. [2021-06-06 00:12:15,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:12:15,177 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:12:15,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:15,182 INFO L225 Difference]: With dead ends: 3677 [2021-06-06 00:12:15,182 INFO L226 Difference]: Without dead ends: 3647 [2021-06-06 00:12:15,182 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 928.7ms TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:12:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2021-06-06 00:12:15,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 2319. [2021-06-06 00:12:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 2318 states have (on average 3.4516824849007763) internal successors, (8001), 2318 states have internal predecessors, (8001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 8001 transitions. [2021-06-06 00:12:15,217 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 8001 transitions. Word has length 26 [2021-06-06 00:12:15,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:15,217 INFO L482 AbstractCegarLoop]: Abstraction has 2319 states and 8001 transitions. [2021-06-06 00:12:15,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:15,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 8001 transitions. [2021-06-06 00:12:15,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:15,220 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:15,220 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:15,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3248 [2021-06-06 00:12:15,420 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:15,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:15,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1882681429, now seen corresponding path program 60 times [2021-06-06 00:12:15,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:15,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248222196] [2021-06-06 00:12:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:15,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:15,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248222196] [2021-06-06 00:12:15,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248222196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:15,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662442064] [2021-06-06 00:12:15,563 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 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 [2021-06-06 00:12:15,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:12:15,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:15,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:12:15,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:15,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:15,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:15,802 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-06 00:12:15,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-06-06 00:12:15,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:15,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:15,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:15,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:15,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-06-06 00:12:15,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:15,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:15,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:15,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:15,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-06 00:12:15,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:15,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:15,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:15,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:15,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 45 [2021-06-06 00:12:15,896 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:15,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:15,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:15,912 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:12:15,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:12:15,913 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:15,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:15,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:15,935 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-06-06 00:12:15,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-06 00:12:15,937 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:15,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:15,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:15,961 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-06 00:12:15,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-06-06 00:12:15,962 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:15,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:15,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:15,979 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:12:15,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:12:15,980 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:15,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:15,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:15,995 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:12:15,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:12:15,996 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:16,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:16,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:16,011 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:12:16,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:12:16,012 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:16,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:16,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:16,027 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:12:16,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:12:16,028 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:16,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:16,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:16,042 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:12:16,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-06 00:12:16,043 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:16,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:16,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:16,058 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:12:16,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:12:16,059 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:16,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:16,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:16,081 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-06 00:12:16,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:12:16,083 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:16,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:16,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:16,104 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-06 00:12:16,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-06 00:12:16,106 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:16,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:16,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:16,114 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-06 00:12:16,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:12:16,115 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:16,191 INFO L628 ElimStorePlain]: treesize reduction 132, result has 34.3 percent of original size [2021-06-06 00:12:16,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:12:16,192 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:69 [2021-06-06 00:12:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:16,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662442064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:16,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:16,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-06 00:12:16,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834804973] [2021-06-06 00:12:16,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:12:16,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:16,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:12:16,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:12:16,281 INFO L87 Difference]: Start difference. First operand 2319 states and 8001 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:17,333 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-06 00:12:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:18,120 INFO L93 Difference]: Finished difference Result 3983 states and 12879 transitions. [2021-06-06 00:12:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:12:18,121 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:12:18,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:18,126 INFO L225 Difference]: With dead ends: 3983 [2021-06-06 00:12:18,126 INFO L226 Difference]: Without dead ends: 3939 [2021-06-06 00:12:18,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1676.8ms TimeCoverageRelationStatistics Valid=466, Invalid=1696, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:12:18,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2021-06-06 00:12:18,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 2319. [2021-06-06 00:12:18,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 2318 states have (on average 3.4490940465918896) internal successors, (7995), 2318 states have internal predecessors, (7995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:18,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 7995 transitions. [2021-06-06 00:12:18,163 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 7995 transitions. Word has length 26 [2021-06-06 00:12:18,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:18,163 INFO L482 AbstractCegarLoop]: Abstraction has 2319 states and 7995 transitions. [2021-06-06 00:12:18,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:18,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 7995 transitions. [2021-06-06 00:12:18,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:18,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:18,166 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:18,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:18,366 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:18,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:18,367 INFO L82 PathProgramCache]: Analyzing trace with hash 534773347, now seen corresponding path program 46 times [2021-06-06 00:12:18,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:18,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069407642] [2021-06-06 00:12:18,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:18,644 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-06 00:12:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:18,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:18,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069407642] [2021-06-06 00:12:18,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069407642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:18,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349108559] [2021-06-06 00:12:18,776 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 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 [2021-06-06 00:12:18,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:12:18,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:18,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:12:18,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:19,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,024 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:19,025 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-06 00:12:19,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:19,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:19,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-06-06 00:12:19,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:19,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:19,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-06 00:12:19,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:19,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,070 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:19,070 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:12:19,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:19,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,082 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:19,082 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:12:19,083 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:19,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,097 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:19,097 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-06 00:12:19,098 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:19,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,113 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:19,113 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:12:19,113 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:19,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,142 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:19,142 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2021-06-06 00:12:19,143 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:19,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,160 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:19,160 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:12:19,161 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:19,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,176 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:19,176 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:12:19,177 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:19,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,194 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:19,194 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-06-06 00:12:19,195 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,211 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:19,211 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-06 00:12:19,212 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:19,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:19,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-06-06 00:12:19,236 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:19,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,250 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:19,250 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:12:19,251 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:19,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,264 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:19,264 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2021-06-06 00:12:19,266 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:19,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:19,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:19,275 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:19,275 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:12:19,276 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:19,405 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-06-06 00:12:19,406 INFO L628 ElimStorePlain]: treesize reduction 46, result has 65.7 percent of original size [2021-06-06 00:12:19,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:12:19,407 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:689, output treesize:88 [2021-06-06 00:12:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:19,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349108559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:19,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:19,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:12:19,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28915335] [2021-06-06 00:12:19,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:12:19,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:19,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:12:19,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:12:19,501 INFO L87 Difference]: Start difference. First operand 2319 states and 7995 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:20,875 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-06-06 00:12:21,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:21,391 INFO L93 Difference]: Finished difference Result 3035 states and 10159 transitions. [2021-06-06 00:12:21,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:12:21,392 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:12:21,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:21,395 INFO L225 Difference]: With dead ends: 3035 [2021-06-06 00:12:21,396 INFO L226 Difference]: Without dead ends: 3005 [2021-06-06 00:12:21,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1845.6ms TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:12:21,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2021-06-06 00:12:21,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 2314. [2021-06-06 00:12:21,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2313 states have (on average 3.4466061392131433) internal successors, (7972), 2313 states have internal predecessors, (7972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 7972 transitions. [2021-06-06 00:12:21,423 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 7972 transitions. Word has length 26 [2021-06-06 00:12:21,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:21,423 INFO L482 AbstractCegarLoop]: Abstraction has 2314 states and 7972 transitions. [2021-06-06 00:12:21,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:21,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 7972 transitions. [2021-06-06 00:12:21,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:21,426 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:21,426 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, 1, 1, 1] [2021-06-06 00:12:21,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3388,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:21,626 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:21,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:21,626 INFO L82 PathProgramCache]: Analyzing trace with hash 955312879, now seen corresponding path program 47 times [2021-06-06 00:12:21,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:21,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000163359] [2021-06-06 00:12:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:21,873 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-06-06 00:12:21,983 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-06-06 00:12:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:22,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:22,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000163359] [2021-06-06 00:12:22,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000163359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:22,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843695655] [2021-06-06 00:12:22,022 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 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 [2021-06-06 00:12:22,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:12:22,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:22,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:12:22,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:22,412 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-06 00:12:22,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:22,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:22,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:12:22,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:22,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:22,573 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:22,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-06 00:12:22,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:22,882 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-06-06 00:12:22,882 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.6 percent of original size [2021-06-06 00:12:22,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:22,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:22,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:12:22,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:22,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:22,909 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:22,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-06 00:12:22,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:23,052 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-06 00:12:23,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:23,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:23,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:12:23,069 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:23,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,081 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:23,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:12:23,083 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:23,211 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-06 00:12:23,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:23,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,225 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:23,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:12:23,227 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:23,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:23,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:12:23,240 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:23,355 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-06 00:12:23,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:23,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,368 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:23,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:12:23,369 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:23,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:23,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:23,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-06 00:12:23,380 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:23,483 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-06 00:12:23,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:23,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-06 00:12:23,488 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:411, output treesize:176 [2021-06-06 00:12:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:23,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843695655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:23,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:23,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:12:23,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546947401] [2021-06-06 00:12:23,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:12:23,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:23,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:12:23,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:12:23,625 INFO L87 Difference]: Start difference. First operand 2314 states and 7972 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:24,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:24,908 INFO L93 Difference]: Finished difference Result 3062 states and 10279 transitions. [2021-06-06 00:12:24,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:12:24,909 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:12:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:24,913 INFO L225 Difference]: With dead ends: 3062 [2021-06-06 00:12:24,913 INFO L226 Difference]: Without dead ends: 3037 [2021-06-06 00:12:24,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1537.7ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:12:24,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2021-06-06 00:12:24,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 2304. [2021-06-06 00:12:24,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 3.449413808076422) internal successors, (7944), 2303 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:24,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 7944 transitions. [2021-06-06 00:12:24,944 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 7944 transitions. Word has length 26 [2021-06-06 00:12:24,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:24,944 INFO L482 AbstractCegarLoop]: Abstraction has 2304 states and 7944 transitions. [2021-06-06 00:12:24,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:24,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 7944 transitions. [2021-06-06 00:12:24,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:24,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:24,946 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:25,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3409 [2021-06-06 00:12:25,147 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:25,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:25,147 INFO L82 PathProgramCache]: Analyzing trace with hash -441885819, now seen corresponding path program 61 times [2021-06-06 00:12:25,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:25,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930349939] [2021-06-06 00:12:25,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:25,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:25,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930349939] [2021-06-06 00:12:25,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930349939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:25,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052179825] [2021-06-06 00:12:25,345 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 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 [2021-06-06 00:12:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:25,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:12:25,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:25,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,851 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-06 00:12:25,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:25,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,859 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 39 treesize of output 19 [2021-06-06 00:12:25,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:25,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,867 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 30 treesize of output 16 [2021-06-06 00:12:25,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:25,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,875 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:12:25,875 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:25,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,883 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 39 treesize of output 13 [2021-06-06 00:12:25,884 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:25,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,891 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 32 treesize of output 16 [2021-06-06 00:12:25,892 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:25,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,900 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 39 treesize of output 16 [2021-06-06 00:12:25,900 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:25,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,908 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 30 treesize of output 16 [2021-06-06 00:12:25,908 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:25,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,916 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-06 00:12:25,916 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:25,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,924 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 37 treesize of output 19 [2021-06-06 00:12:25,925 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:25,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,932 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 35 treesize of output 19 [2021-06-06 00:12:25,933 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:25,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,940 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 33 treesize of output 13 [2021-06-06 00:12:25,941 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:25,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,949 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 35 treesize of output 19 [2021-06-06 00:12:25,949 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:25,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,956 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 28 treesize of output 13 [2021-06-06 00:12:25,957 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:25,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:25,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:25,961 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 34 treesize of output 16 [2021-06-06 00:12:25,961 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:25,981 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-06 00:12:25,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-06 00:12:25,982 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-06 00:12:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:26,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052179825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:26,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:26,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-06 00:12:26,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132225787] [2021-06-06 00:12:26,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:12:26,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:26,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:12:26,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:12:26,006 INFO L87 Difference]: Start difference. First operand 2304 states and 7944 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:27,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:27,437 INFO L93 Difference]: Finished difference Result 3206 states and 10682 transitions. [2021-06-06 00:12:27,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:12:27,437 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:12:27,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:27,441 INFO L225 Difference]: With dead ends: 3206 [2021-06-06 00:12:27,441 INFO L226 Difference]: Without dead ends: 3169 [2021-06-06 00:12:27,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1393.8ms TimeCoverageRelationStatistics Valid=459, Invalid=1703, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:12:27,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3169 states. [2021-06-06 00:12:27,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3169 to 2344. [2021-06-06 00:12:27,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 3.452838241570636) internal successors, (8090), 2343 states have internal predecessors, (8090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:27,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 8090 transitions. [2021-06-06 00:12:27,470 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 8090 transitions. Word has length 26 [2021-06-06 00:12:27,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:27,470 INFO L482 AbstractCegarLoop]: Abstraction has 2344 states and 8090 transitions. [2021-06-06 00:12:27,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:27,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 8090 transitions. [2021-06-06 00:12:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:27,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:27,473 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:27,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3445,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:27,673 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:27,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:27,673 INFO L82 PathProgramCache]: Analyzing trace with hash 483608047, now seen corresponding path program 62 times [2021-06-06 00:12:27,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:27,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489997691] [2021-06-06 00:12:27,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:27,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:27,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489997691] [2021-06-06 00:12:27,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489997691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:27,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830554455] [2021-06-06 00:12:27,922 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 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 [2021-06-06 00:12:27,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:12:27,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:27,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:12:27,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:28,312 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_401, v_prenex_403], 5=[A, v_prenex_399]} [2021-06-06 00:12:28,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:28,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:28,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:28,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:12:28,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:28,403 INFO L628 ElimStorePlain]: treesize reduction 133, result has 44.6 percent of original size [2021-06-06 00:12:28,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:28,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:28,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:28,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-06 00:12:28,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:28,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:28,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:28,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:28,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:28,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-06 00:12:28,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:28,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:28,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:28,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:28,468 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 27 treesize of output 13 [2021-06-06 00:12:28,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:28,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:28,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-06 00:12:28,490 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:274, output treesize:31 [2021-06-06 00:12:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:28,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830554455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:28,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:28,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-06 00:12:28,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812039308] [2021-06-06 00:12:28,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:12:28,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:28,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:12:28,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:12:28,532 INFO L87 Difference]: Start difference. First operand 2344 states and 8090 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:30,414 INFO L93 Difference]: Finished difference Result 3360 states and 11166 transitions. [2021-06-06 00:12:30,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-06 00:12:30,414 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:12:30,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:30,419 INFO L225 Difference]: With dead ends: 3360 [2021-06-06 00:12:30,419 INFO L226 Difference]: Without dead ends: 3326 [2021-06-06 00:12:30,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1788.7ms TimeCoverageRelationStatistics Valid=528, Invalid=1922, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:12:30,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-06-06 00:12:30,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2364. [2021-06-06 00:12:30,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2363 states have (on average 3.446043165467626) internal successors, (8143), 2363 states have internal predecessors, (8143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:30,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 8143 transitions. [2021-06-06 00:12:30,458 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 8143 transitions. Word has length 26 [2021-06-06 00:12:30,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:30,458 INFO L482 AbstractCegarLoop]: Abstraction has 2364 states and 8143 transitions. [2021-06-06 00:12:30,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:30,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 8143 transitions. [2021-06-06 00:12:30,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:30,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:30,461 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:30,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3543,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:30,661 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:30,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:30,661 INFO L82 PathProgramCache]: Analyzing trace with hash 256075815, now seen corresponding path program 48 times [2021-06-06 00:12:30,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:30,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061209732] [2021-06-06 00:12:30,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:30,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:30,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061209732] [2021-06-06 00:12:30,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061209732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:30,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289317986] [2021-06-06 00:12:30,993 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 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 [2021-06-06 00:12:31,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:12:31,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:31,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:12:31,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:31,499 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-06 00:12:31,926 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_437, v_prenex_427, A, v_prenex_439, v_prenex_428, v_prenex_431, v_prenex_432, v_prenex_421, v_prenex_423, v_prenex_435], 3=[v_prenex_422, v_prenex_425]} [2021-06-06 00:12:31,956 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:12:31,957 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 28 treesize of output 28 [2021-06-06 00:12:31,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:32,328 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 147 [2021-06-06 00:12:32,329 INFO L628 ElimStorePlain]: treesize reduction 122, result has 76.9 percent of original size [2021-06-06 00:12:32,329 INFO L518 ElimStorePlain]: Eliminatee v_prenex_427 vanished before elimination [2021-06-06 00:12:32,354 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:12:32,355 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 30 treesize of output 28 [2021-06-06 00:12:32,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:32,512 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-06 00:12:32,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:32,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:32,532 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 28 treesize of output 32 [2021-06-06 00:12:32,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:32,686 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-06 00:12:32,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:32,708 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:12:32,708 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 30 treesize of output 24 [2021-06-06 00:12:32,709 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:32,860 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-06 00:12:32,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:32,860 INFO L518 ElimStorePlain]: Eliminatee v_prenex_431 vanished before elimination [2021-06-06 00:12:32,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:32,880 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 28 treesize of output 32 [2021-06-06 00:12:32,882 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:33,037 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-06 00:12:33,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:33,058 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:12:33,058 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 28 treesize of output 24 [2021-06-06 00:12:33,060 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:33,210 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-06 00:12:33,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:33,235 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:12:33,235 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 28 [2021-06-06 00:12:33,236 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:33,389 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-06 00:12:33,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:33,409 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:12:33,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 21 [2021-06-06 00:12:33,411 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:33,561 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-06 00:12:33,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:33,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:33,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:33,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-06-06 00:12:33,583 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:33,725 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-06 00:12:33,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:33,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:33,767 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-06 00:12:33,767 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 25 treesize of output 27 [2021-06-06 00:12:33,771 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:33,959 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-06 00:12:33,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:33,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-06 00:12:33,982 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:545, output treesize:490 [2021-06-06 00:12:34,258 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-06 00:12:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:34,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289317986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:34,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:34,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-06 00:12:34,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641316786] [2021-06-06 00:12:34,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:12:34,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:34,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:12:34,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:12:34,369 INFO L87 Difference]: Start difference. First operand 2364 states and 8143 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:35,022 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-06 00:12:35,986 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-06-06 00:12:36,341 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2021-06-06 00:12:36,669 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-06 00:12:36,917 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-06 00:12:37,166 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 81 [2021-06-06 00:12:37,405 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-06 00:12:38,024 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 85 [2021-06-06 00:12:38,289 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2021-06-06 00:12:39,099 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 96 [2021-06-06 00:12:39,640 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-06-06 00:12:39,885 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-06-06 00:12:40,064 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 26 [2021-06-06 00:12:40,240 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 34 [2021-06-06 00:12:40,401 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 30 [2021-06-06 00:12:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:40,613 INFO L93 Difference]: Finished difference Result 3432 states and 11237 transitions. [2021-06-06 00:12:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:12:40,614 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:12:40,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:40,618 INFO L225 Difference]: With dead ends: 3432 [2021-06-06 00:12:40,618 INFO L226 Difference]: Without dead ends: 3387 [2021-06-06 00:12:40,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 6219.1ms TimeCoverageRelationStatistics Valid=402, Invalid=2460, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:12:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3387 states. [2021-06-06 00:12:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3387 to 2369. [2021-06-06 00:12:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 2368 states have (on average 3.4451013513513513) internal successors, (8158), 2368 states have internal predecessors, (8158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 8158 transitions. [2021-06-06 00:12:40,650 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 8158 transitions. Word has length 26 [2021-06-06 00:12:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:40,650 INFO L482 AbstractCegarLoop]: Abstraction has 2369 states and 8158 transitions. [2021-06-06 00:12:40,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 8158 transitions. [2021-06-06 00:12:40,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:40,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:40,653 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, 1, 1, 1] [2021-06-06 00:12:40,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:40,854 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:40,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:40,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1128567001, now seen corresponding path program 49 times [2021-06-06 00:12:40,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:40,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599283465] [2021-06-06 00:12:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:41,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:41,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599283465] [2021-06-06 00:12:41,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599283465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:41,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926232314] [2021-06-06 00:12:41,153 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 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 [2021-06-06 00:12:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:41,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:12:41,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:41,624 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-06 00:12:41,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:41,857 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-06 00:12:41,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:12:41,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:41,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:41,884 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:12:41,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-06 00:12:41,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:42,281 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 152 [2021-06-06 00:12:42,281 INFO L628 ElimStorePlain]: treesize reduction 76, result has 84.7 percent of original size [2021-06-06 00:12:42,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:42,307 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:12:42,307 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 28 [2021-06-06 00:12:42,308 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:42,490 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-06 00:12:42,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:42,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:42,519 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:12:42,519 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 30 treesize of output 24 [2021-06-06 00:12:42,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:42,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:42,546 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-06 00:12:42,547 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 30 treesize of output 28 [2021-06-06 00:12:42,548 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:42,867 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 144 [2021-06-06 00:12:42,867 INFO L628 ElimStorePlain]: treesize reduction 33, result has 91.6 percent of original size [2021-06-06 00:12:42,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:42,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:42,892 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 30 treesize of output 32 [2021-06-06 00:12:42,897 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:42,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:42,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:42,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-06 00:12:42,921 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:43,180 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 136 [2021-06-06 00:12:43,180 INFO L628 ElimStorePlain]: treesize reduction 49, result has 85.8 percent of original size [2021-06-06 00:12:43,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:43,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:43,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-06 00:12:43,206 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:43,432 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 127 [2021-06-06 00:12:43,432 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.8 percent of original size [2021-06-06 00:12:43,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:43,453 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:12:43,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:12:43,455 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:43,561 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-06 00:12:43,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:43,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:43,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:43,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-06 00:12:43,584 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:43,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:43,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:43,704 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-06 00:12:43,704 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 21 [2021-06-06 00:12:43,706 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:43,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:43,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-06 00:12:43,820 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:563, output treesize:231 [2021-06-06 00:12:43,942 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-06-06 00:12:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:43,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926232314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:43,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:43,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:12:43,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693416067] [2021-06-06 00:12:43,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:12:43,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:43,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:12:43,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:12:43,976 INFO L87 Difference]: Start difference. First operand 2369 states and 8158 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:44,335 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-06 00:12:44,926 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-06-06 00:12:45,242 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-06 00:12:45,432 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-06 00:12:45,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:45,687 INFO L93 Difference]: Finished difference Result 3462 states and 11530 transitions. [2021-06-06 00:12:45,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:12:45,688 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:12:45,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:45,692 INFO L225 Difference]: With dead ends: 3462 [2021-06-06 00:12:45,692 INFO L226 Difference]: Without dead ends: 3432 [2021-06-06 00:12:45,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2036.8ms TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:12:45,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3432 states. [2021-06-06 00:12:45,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3432 to 2352. [2021-06-06 00:12:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 3.441514249255636) internal successors, (8091), 2351 states have internal predecessors, (8091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 8091 transitions. [2021-06-06 00:12:45,723 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 8091 transitions. Word has length 26 [2021-06-06 00:12:45,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:45,723 INFO L482 AbstractCegarLoop]: Abstraction has 2352 states and 8091 transitions. [2021-06-06 00:12:45,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 8091 transitions. [2021-06-06 00:12:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:45,727 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:45,727 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:45,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3595 [2021-06-06 00:12:45,941 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:45,941 INFO L82 PathProgramCache]: Analyzing trace with hash 676615347, now seen corresponding path program 50 times [2021-06-06 00:12:45,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:45,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743370583] [2021-06-06 00:12:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:46,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:46,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743370583] [2021-06-06 00:12:46,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743370583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:46,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117078585] [2021-06-06 00:12:46,256 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 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 [2021-06-06 00:12:46,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:12:46,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:46,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:12:46,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:46,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:46,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:12:46,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,487 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:46,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-06 00:12:46,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,496 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:46,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-06 00:12:46,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,505 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:46,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:12:46,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,517 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:46,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-06-06 00:12:46,518 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,526 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:46,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:12:46,528 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,539 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:46,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-06 00:12:46,541 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,550 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:46,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-06-06 00:12:46,551 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,559 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:46,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:12:46,559 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,570 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:46,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:12:46,572 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,580 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:46,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-06 00:12:46,582 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,591 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:46,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:12:46,592 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,602 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:46,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:12:46,602 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,610 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:46,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:12:46,611 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:46,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-06 00:12:46,624 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:46,630 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-06 00:12:46,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:12:46,631 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:46,702 INFO L628 ElimStorePlain]: treesize reduction 15, result has 83.9 percent of original size [2021-06-06 00:12:46,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:12:46,703 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-06-06 00:12:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:46,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117078585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:46,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:46,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:12:46,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826137083] [2021-06-06 00:12:46,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:12:46,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:46,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:12:46,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:12:46,791 INFO L87 Difference]: Start difference. First operand 2352 states and 8091 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:47,761 INFO L93 Difference]: Finished difference Result 3124 states and 10478 transitions. [2021-06-06 00:12:47,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:12:47,761 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:12:47,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:47,766 INFO L225 Difference]: With dead ends: 3124 [2021-06-06 00:12:47,766 INFO L226 Difference]: Without dead ends: 3099 [2021-06-06 00:12:47,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1034.1ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:12:47,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2021-06-06 00:12:47,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 2339. [2021-06-06 00:12:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 3.441830624465355) internal successors, (8047), 2338 states have internal predecessors, (8047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:47,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 8047 transitions. [2021-06-06 00:12:47,795 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 8047 transitions. Word has length 26 [2021-06-06 00:12:47,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:47,795 INFO L482 AbstractCegarLoop]: Abstraction has 2339 states and 8047 transitions. [2021-06-06 00:12:47,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:47,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 8047 transitions. [2021-06-06 00:12:47,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:47,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:47,798 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, 1, 1, 1] [2021-06-06 00:12:47,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3642,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:47,998 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:47,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1133811217, now seen corresponding path program 51 times [2021-06-06 00:12:47,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:47,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027299527] [2021-06-06 00:12:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:48,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:48,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027299527] [2021-06-06 00:12:48,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027299527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:48,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878932660] [2021-06-06 00:12:48,324 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 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 [2021-06-06 00:12:48,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:12:48,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:48,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:12:48,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:48,688 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-06 00:12:48,843 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_481, v_prenex_482, v_prenex_478], 3=[v_prenex_480]} [2021-06-06 00:12:48,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:48,859 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:48,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:12:48,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:48,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:48,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:48,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-06 00:12:48,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:49,208 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-06-06 00:12:49,209 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.4 percent of original size [2021-06-06 00:12:49,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:49,224 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:49,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-06 00:12:49,225 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:49,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:49,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:49,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-06 00:12:49,240 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:49,393 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-06 00:12:49,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:49,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:49,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:49,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:12:49,412 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:49,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:49,425 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:49,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-06 00:12:49,427 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:49,562 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-06 00:12:49,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:49,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:49,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:49,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-06 00:12:49,579 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:49,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:49,590 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-06 00:12:49,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-06 00:12:49,591 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:49,728 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-06 00:12:49,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:49,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:49,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:49,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:49,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-06 00:12:49,744 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:49,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:49,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:49,754 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-06 00:12:49,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-06-06 00:12:49,755 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:49,862 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-06 00:12:49,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:49,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-06 00:12:49,867 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:421, output treesize:186 [2021-06-06 00:12:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:50,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878932660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:50,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:50,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:12:50,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957694448] [2021-06-06 00:12:50,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:12:50,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:50,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:12:50,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:12:50,010 INFO L87 Difference]: Start difference. First operand 2339 states and 8047 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:50,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:50,761 INFO L93 Difference]: Finished difference Result 2991 states and 10107 transitions. [2021-06-06 00:12:50,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:12:50,761 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:12:50,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:50,765 INFO L225 Difference]: With dead ends: 2991 [2021-06-06 00:12:50,766 INFO L226 Difference]: Without dead ends: 2976 [2021-06-06 00:12:50,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1171.5ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:12:50,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-06-06 00:12:50,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2333. [2021-06-06 00:12:50,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 2332 states have (on average 3.442967409948542) internal successors, (8029), 2332 states have internal predecessors, (8029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 8029 transitions. [2021-06-06 00:12:50,797 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 8029 transitions. Word has length 26 [2021-06-06 00:12:50,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:50,797 INFO L482 AbstractCegarLoop]: Abstraction has 2333 states and 8029 transitions. [2021-06-06 00:12:50,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:50,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 8029 transitions. [2021-06-06 00:12:50,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:50,800 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:50,800 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:51,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3661 [2021-06-06 00:12:51,000 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:51,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:51,001 INFO L82 PathProgramCache]: Analyzing trace with hash 118535907, now seen corresponding path program 63 times [2021-06-06 00:12:51,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:51,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555152231] [2021-06-06 00:12:51,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:51,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:51,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555152231] [2021-06-06 00:12:51,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555152231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:51,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992063565] [2021-06-06 00:12:51,189 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 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 [2021-06-06 00:12:51,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:12:51,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:51,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:12:51,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:51,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,683 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:12:51,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-06-06 00:12:51,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:51,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,712 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:12:51,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-06 00:12:51,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:51,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,731 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:12:51,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:12:51,732 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:51,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,748 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:12:51,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:12:51,748 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:51,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,787 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-06 00:12:51,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-06 00:12:51,789 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:51,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,812 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-06 00:12:51,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-06-06 00:12:51,813 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:51,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,828 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:12:51,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-06-06 00:12:51,829 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:51,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,844 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:12:51,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:12:51,845 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:51,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,868 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:12:51,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-06-06 00:12:51,870 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:51,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,893 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-06 00:12:51,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-06 00:12:51,895 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:51,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,918 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-06 00:12:51,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-06 00:12:51,919 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:51,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,942 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-06-06 00:12:51,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-06-06 00:12:51,943 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:51,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,958 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:12:51,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:12:51,959 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:51,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:51,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-06 00:12:51,987 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:51,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:51,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:52,001 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:12:52,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-06 00:12:52,002 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:52,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:52,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:52,010 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:12:52,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-06 00:12:52,011 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:52,102 INFO L628 ElimStorePlain]: treesize reduction 105, result has 47.0 percent of original size [2021-06-06 00:12:52,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:12:52,103 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-06-06 00:12:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:52,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992063565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:52,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:52,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-06 00:12:52,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837222518] [2021-06-06 00:12:52,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:12:52,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:52,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:12:52,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:12:52,197 INFO L87 Difference]: Start difference. First operand 2333 states and 8029 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:54,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:54,653 INFO L93 Difference]: Finished difference Result 3591 states and 11838 transitions. [2021-06-06 00:12:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:12:54,654 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:12:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:54,658 INFO L225 Difference]: With dead ends: 3591 [2021-06-06 00:12:54,658 INFO L226 Difference]: Without dead ends: 3547 [2021-06-06 00:12:54,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 2203.3ms TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2021-06-06 00:12:54,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2021-06-06 00:12:54,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 2360. [2021-06-06 00:12:54,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 3.4412886816447648) internal successors, (8118), 2359 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:54,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 8118 transitions. [2021-06-06 00:12:54,692 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 8118 transitions. Word has length 26 [2021-06-06 00:12:54,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:54,692 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 8118 transitions. [2021-06-06 00:12:54,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:54,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 8118 transitions. [2021-06-06 00:12:54,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:54,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:54,695 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:54,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3698,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:54,895 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:54,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:54,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1466803217, now seen corresponding path program 64 times [2021-06-06 00:12:54,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:54,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561584906] [2021-06-06 00:12:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:55,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:55,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561584906] [2021-06-06 00:12:55,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561584906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:55,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266443554] [2021-06-06 00:12:55,160 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 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 [2021-06-06 00:12:55,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:12:55,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:55,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:12:55,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:55,570 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-06-06 00:12:55,647 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_486], 5=[v_prenex_487, v_prenex_488]} [2021-06-06 00:12:55,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:55,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:55,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:55,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:55,655 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 23 treesize of output 13 [2021-06-06 00:12:55,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:55,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:55,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:55,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:55,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-06 00:12:55,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:55,738 INFO L628 ElimStorePlain]: treesize reduction 130, result has 41.2 percent of original size [2021-06-06 00:12:55,738 INFO L518 ElimStorePlain]: Eliminatee v_prenex_486 vanished before elimination [2021-06-06 00:12:55,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:55,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:55,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-06 00:12:55,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:55,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:55,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:55,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:55,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:12:55,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-06 00:12:55,771 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:55,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:55,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:12:55,792 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:274, output treesize:24 [2021-06-06 00:12:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:55,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266443554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:55,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:12:55,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:12:55,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282938825] [2021-06-06 00:12:55,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:12:55,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:12:55,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:12:55,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:12:55,832 INFO L87 Difference]: Start difference. First operand 2360 states and 8118 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:57,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:12:57,101 INFO L93 Difference]: Finished difference Result 3132 states and 10494 transitions. [2021-06-06 00:12:57,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:12:57,101 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:12:57,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:12:57,106 INFO L225 Difference]: With dead ends: 3132 [2021-06-06 00:12:57,106 INFO L226 Difference]: Without dead ends: 3117 [2021-06-06 00:12:57,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1272.6ms TimeCoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2021-06-06 00:12:57,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2021-06-06 00:12:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2360. [2021-06-06 00:12:57,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 3.4412886816447648) internal successors, (8118), 2359 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:57,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 8118 transitions. [2021-06-06 00:12:57,134 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 8118 transitions. Word has length 26 [2021-06-06 00:12:57,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:12:57,134 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 8118 transitions. [2021-06-06 00:12:57,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:12:57,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 8118 transitions. [2021-06-06 00:12:57,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:12:57,137 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:12:57,137 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:12:57,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3812 [2021-06-06 00:12:57,337 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:12:57,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:12:57,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1440707985, now seen corresponding path program 65 times [2021-06-06 00:12:57,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:12:57,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687747151] [2021-06-06 00:12:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:12:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:12:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:12:57,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:12:57,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687747151] [2021-06-06 00:12:57,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687747151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:12:57,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321479880] [2021-06-06 00:12:57,603 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:12:57,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:12:57,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:12:57,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:12:57,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:12:57,948 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-06 00:12:58,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:58,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:58,239 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-06 00:12:58,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-06-06 00:12:58,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:58,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:58,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:58,281 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-06 00:12:58,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-06-06 00:12:58,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:58,689 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-06 00:12:58,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:58,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:58,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:58,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:58,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-06 00:12:58,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:58,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:58,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:58,757 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-06 00:12:58,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-06 00:12:58,759 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:59,146 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-06 00:12:59,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:59,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:59,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:59,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:59,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-06 00:12:59,187 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:59,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:59,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:59,204 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-06 00:12:59,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-06 00:12:59,204 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:59,559 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-06-06 00:12:59,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:12:59,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:59,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:59,594 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:12:59,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-06-06 00:12:59,596 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:12:59,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:59,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:12:59,625 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:12:59,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-06 00:12:59,630 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:13:00,255 WARN L205 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 142 [2021-06-06 00:13:00,255 INFO L628 ElimStorePlain]: treesize reduction 31, result has 95.0 percent of original size [2021-06-06 00:13:00,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:13:00,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:13:00,285 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:13:00,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-06-06 00:13:00,286 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:13:00,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:13:00,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:13:00,313 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:13:00,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-06 00:13:00,314 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:13:00,596 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-06 00:13:00,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:13:00,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:13:00,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:13:00,626 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-06 00:13:00,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-06-06 00:13:00,628 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:13:00,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:13:00,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:13:00,653 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:13:00,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-06-06 00:13:00,658 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:13:01,149 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2021-06-06 00:13:01,150 INFO L628 ElimStorePlain]: treesize reduction 33, result has 93.4 percent of original size [2021-06-06 00:13:01,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:13:01,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:13:01,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:13:01,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-06-06 00:13:01,186 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:13:01,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:13:01,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:13:01,211 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-06 00:13:01,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-06-06 00:13:01,215 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:13:01,853 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 111 [2021-06-06 00:13:01,853 INFO L628 ElimStorePlain]: treesize reduction 40, result has 91.2 percent of original size [2021-06-06 00:13:01,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:13:01,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:13:01,881 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-06 00:13:01,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-06 00:13:01,883 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:13:01,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:13:01,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:13:01,906 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-06 00:13:01,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-06-06 00:13:01,909 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:13:02,107 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-06 00:13:02,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:13:02,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-06 00:13:02,122 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:422 [2021-06-06 00:13:02,249 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2021-06-06 00:13:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:02,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321479880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:02,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:02,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-06 00:13:02,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750165056] [2021-06-06 00:13:02,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:13:02,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:02,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:13:02,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:13:02,336 INFO L87 Difference]: Start difference. First operand 2360 states and 8118 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:03,200 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-06 00:13:03,387 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-06 00:13:08,744 WARN L205 SmtUtils]: Spent 5.14 s on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2021-06-06 00:13:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:09,279 INFO L93 Difference]: Finished difference Result 3258 states and 10844 transitions. [2021-06-06 00:13:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:13:09,279 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:13:09,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:09,284 INFO L225 Difference]: With dead ends: 3258 [2021-06-06 00:13:09,284 INFO L226 Difference]: Without dead ends: 3228 [2021-06-06 00:13:09,284 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 6898.0ms TimeCoverageRelationStatistics Valid=299, Invalid=1261, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:13:09,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-06-06 00:13:09,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2352. [2021-06-06 00:13:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 3.442364951084645) internal successors, (8093), 2351 states have internal predecessors, (8093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 8093 transitions. [2021-06-06 00:13:09,315 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 8093 transitions. Word has length 26 [2021-06-06 00:13:09,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:09,315 INFO L482 AbstractCegarLoop]: Abstraction has 2352 states and 8093 transitions. [2021-06-06 00:13:09,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:09,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 8093 transitions. [2021-06-06 00:13:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:09,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:09,318 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:09,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3827,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:09,520 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:09,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:09,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1407294025, now seen corresponding path program 52 times [2021-06-06 00:13:09,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:09,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081835841] [2021-06-06 00:13:09,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:09,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:09,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081835841] [2021-06-06 00:13:09,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081835841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:09,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868679238] [2021-06-06 00:13:09,562 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 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 [2021-06-06 00:13:09,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:13:09,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:09,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:09,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:09,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868679238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:09,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:09,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:13:09,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113406162] [2021-06-06 00:13:09,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:09,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:09,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:09,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:09,683 INFO L87 Difference]: Start difference. First operand 2352 states and 8093 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:10,627 INFO L93 Difference]: Finished difference Result 5410 states and 16973 transitions. [2021-06-06 00:13:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:13:10,628 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:10,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:10,634 INFO L225 Difference]: With dead ends: 5410 [2021-06-06 00:13:10,634 INFO L226 Difference]: Without dead ends: 5410 [2021-06-06 00:13:10,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 548.5ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:13:10,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5410 states. [2021-06-06 00:13:10,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5410 to 2548. [2021-06-06 00:13:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2547 states have (on average 3.486062033765214) internal successors, (8879), 2547 states have internal predecessors, (8879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 8879 transitions. [2021-06-06 00:13:10,676 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 8879 transitions. Word has length 28 [2021-06-06 00:13:10,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:10,677 INFO L482 AbstractCegarLoop]: Abstraction has 2548 states and 8879 transitions. [2021-06-06 00:13:10,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:10,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 8879 transitions. [2021-06-06 00:13:10,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:10,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:10,679 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:10,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3898,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:10,880 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:10,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:10,880 INFO L82 PathProgramCache]: Analyzing trace with hash 430975181, now seen corresponding path program 53 times [2021-06-06 00:13:10,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:10,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595582148] [2021-06-06 00:13:10,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:10,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:10,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595582148] [2021-06-06 00:13:10,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595582148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:10,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823646080] [2021-06-06 00:13:10,922 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 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 [2021-06-06 00:13:10,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:13:10,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:10,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:10,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:11,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823646080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:11,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:11,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:13:11,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390810818] [2021-06-06 00:13:11,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:13:11,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:11,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:13:11,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:13:11,055 INFO L87 Difference]: Start difference. First operand 2548 states and 8879 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:12,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:12,328 INFO L93 Difference]: Finished difference Result 7046 states and 21713 transitions. [2021-06-06 00:13:12,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:13:12,328 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:12,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:12,339 INFO L225 Difference]: With dead ends: 7046 [2021-06-06 00:13:12,339 INFO L226 Difference]: Without dead ends: 7046 [2021-06-06 00:13:12,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 744.3ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-06 00:13:12,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7046 states. [2021-06-06 00:13:12,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7046 to 2559. [2021-06-06 00:13:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 2558 states have (on average 3.492181391712275) internal successors, (8933), 2558 states have internal predecessors, (8933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 8933 transitions. [2021-06-06 00:13:12,408 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 8933 transitions. Word has length 28 [2021-06-06 00:13:12,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:12,408 INFO L482 AbstractCegarLoop]: Abstraction has 2559 states and 8933 transitions. [2021-06-06 00:13:12,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:12,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 8933 transitions. [2021-06-06 00:13:12,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:12,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:12,412 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:12,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3899 [2021-06-06 00:13:12,613 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:12,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:12,613 INFO L82 PathProgramCache]: Analyzing trace with hash 997927261, now seen corresponding path program 54 times [2021-06-06 00:13:12,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:12,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401664209] [2021-06-06 00:13:12,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:12,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:12,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401664209] [2021-06-06 00:13:12,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401664209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:12,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046697131] [2021-06-06 00:13:12,655 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 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 [2021-06-06 00:13:12,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:13:12,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:12,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:12,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:12,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046697131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:12,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:12,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:13:12,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412793526] [2021-06-06 00:13:12,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:13:12,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:12,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:13:12,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:13:12,786 INFO L87 Difference]: Start difference. First operand 2559 states and 8933 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:13,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:13,960 INFO L93 Difference]: Finished difference Result 6437 states and 20239 transitions. [2021-06-06 00:13:13,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-06 00:13:13,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:13,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:13,969 INFO L225 Difference]: With dead ends: 6437 [2021-06-06 00:13:13,969 INFO L226 Difference]: Without dead ends: 6437 [2021-06-06 00:13:13,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 720.3ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-06 00:13:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6437 states. [2021-06-06 00:13:14,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6437 to 2507. [2021-06-06 00:13:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2506 states have (on average 3.4720670391061454) internal successors, (8701), 2506 states have internal predecessors, (8701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 8701 transitions. [2021-06-06 00:13:14,020 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 8701 transitions. Word has length 28 [2021-06-06 00:13:14,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:14,020 INFO L482 AbstractCegarLoop]: Abstraction has 2507 states and 8701 transitions. [2021-06-06 00:13:14,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 8701 transitions. [2021-06-06 00:13:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:14,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:14,023 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:14,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3900,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:14,224 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:14,224 INFO L82 PathProgramCache]: Analyzing trace with hash -2115011713, now seen corresponding path program 55 times [2021-06-06 00:13:14,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:14,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667484883] [2021-06-06 00:13:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:14,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:14,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667484883] [2021-06-06 00:13:14,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667484883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:14,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040622623] [2021-06-06 00:13:14,266 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 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 [2021-06-06 00:13:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:14,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:14,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:14,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040622623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:14,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:14,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:13:14,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892354984] [2021-06-06 00:13:14,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:14,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:14,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:14,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:14,386 INFO L87 Difference]: Start difference. First operand 2507 states and 8701 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:15,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:15,481 INFO L93 Difference]: Finished difference Result 5496 states and 17140 transitions. [2021-06-06 00:13:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:13:15,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:15,488 INFO L225 Difference]: With dead ends: 5496 [2021-06-06 00:13:15,488 INFO L226 Difference]: Without dead ends: 5496 [2021-06-06 00:13:15,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 650.7ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:13:15,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5496 states. [2021-06-06 00:13:15,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5496 to 2522. [2021-06-06 00:13:15,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 3.4668782229274098) internal successors, (8740), 2521 states have internal predecessors, (8740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:15,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 8740 transitions. [2021-06-06 00:13:15,532 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 8740 transitions. Word has length 28 [2021-06-06 00:13:15,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:15,533 INFO L482 AbstractCegarLoop]: Abstraction has 2522 states and 8740 transitions. [2021-06-06 00:13:15,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:15,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 8740 transitions. [2021-06-06 00:13:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:15,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:15,535 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:15,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3901,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:15,736 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:15,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:15,736 INFO L82 PathProgramCache]: Analyzing trace with hash 970325317, now seen corresponding path program 66 times [2021-06-06 00:13:15,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:15,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622816681] [2021-06-06 00:13:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:15,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:15,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622816681] [2021-06-06 00:13:15,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622816681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:15,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025568748] [2021-06-06 00:13:15,777 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 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 [2021-06-06 00:13:15,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:13:15,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:15,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:15,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:15,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025568748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:15,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:15,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:13:15,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390790259] [2021-06-06 00:13:15,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:15,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:15,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:15,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:15,891 INFO L87 Difference]: Start difference. First operand 2522 states and 8740 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:16,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:16,470 INFO L93 Difference]: Finished difference Result 4908 states and 15515 transitions. [2021-06-06 00:13:16,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:13:16,470 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:16,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:16,476 INFO L225 Difference]: With dead ends: 4908 [2021-06-06 00:13:16,476 INFO L226 Difference]: Without dead ends: 4908 [2021-06-06 00:13:16,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 328.7ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:13:16,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4908 states. [2021-06-06 00:13:16,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4908 to 2592. [2021-06-06 00:13:16,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 3.4515631030490157) internal successors, (8943), 2591 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 8943 transitions. [2021-06-06 00:13:16,519 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 8943 transitions. Word has length 28 [2021-06-06 00:13:16,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:16,519 INFO L482 AbstractCegarLoop]: Abstraction has 2592 states and 8943 transitions. [2021-06-06 00:13:16,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:16,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 8943 transitions. [2021-06-06 00:13:16,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:16,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:16,522 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:16,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3902 [2021-06-06 00:13:16,722 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:16,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:16,722 INFO L82 PathProgramCache]: Analyzing trace with hash 828956685, now seen corresponding path program 56 times [2021-06-06 00:13:16,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:16,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115606629] [2021-06-06 00:13:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:16,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:16,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115606629] [2021-06-06 00:13:16,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115606629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:16,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099901947] [2021-06-06 00:13:16,750 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 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 [2021-06-06 00:13:16,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:16,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:16,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:13:16,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:16,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099901947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:16,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:16,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:13:16,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456182236] [2021-06-06 00:13:16,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:13:16,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:16,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:13:16,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:13:16,836 INFO L87 Difference]: Start difference. First operand 2592 states and 8943 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:17,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:17,009 INFO L93 Difference]: Finished difference Result 4133 states and 13562 transitions. [2021-06-06 00:13:17,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:13:17,009 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:17,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:17,014 INFO L225 Difference]: With dead ends: 4133 [2021-06-06 00:13:17,014 INFO L226 Difference]: Without dead ends: 4085 [2021-06-06 00:13:17,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:13:17,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-06-06 00:13:17,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 2922. [2021-06-06 00:13:17,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.501198219787744) internal successors, (10227), 2921 states have internal predecessors, (10227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 10227 transitions. [2021-06-06 00:13:17,053 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 10227 transitions. Word has length 28 [2021-06-06 00:13:17,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:17,053 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 10227 transitions. [2021-06-06 00:13:17,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:17,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 10227 transitions. [2021-06-06 00:13:17,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:17,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:17,056 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:17,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3903,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:17,257 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:17,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:17,257 INFO L82 PathProgramCache]: Analyzing trace with hash 391987977, now seen corresponding path program 57 times [2021-06-06 00:13:17,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:17,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017125574] [2021-06-06 00:13:17,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:17,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:17,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017125574] [2021-06-06 00:13:17,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017125574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:17,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189827262] [2021-06-06 00:13:17,292 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 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 [2021-06-06 00:13:17,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:13:17,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:17,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:17,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:17,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189827262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:17,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:17,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:13:17,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888234073] [2021-06-06 00:13:17,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:17,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:17,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:17,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:17,395 INFO L87 Difference]: Start difference. First operand 2922 states and 10227 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-06 00:13:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:17,978 INFO L93 Difference]: Finished difference Result 4714 states and 15191 transitions. [2021-06-06 00:13:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:13:17,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-06 00:13:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:17,985 INFO L225 Difference]: With dead ends: 4714 [2021-06-06 00:13:17,985 INFO L226 Difference]: Without dead ends: 4667 [2021-06-06 00:13:17,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:13:17,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2021-06-06 00:13:18,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 3096. [2021-06-06 00:13:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 3095 states have (on average 3.5150242326332797) internal successors, (10879), 3095 states have internal predecessors, (10879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 10879 transitions. [2021-06-06 00:13:18,032 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 10879 transitions. Word has length 28 [2021-06-06 00:13:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:18,032 INFO L482 AbstractCegarLoop]: Abstraction has 3096 states and 10879 transitions. [2021-06-06 00:13:18,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-06 00:13:18,032 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 10879 transitions. [2021-06-06 00:13:18,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:18,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:18,036 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:18,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3904 [2021-06-06 00:13:18,237 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:18,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:18,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1928077453, now seen corresponding path program 58 times [2021-06-06 00:13:18,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:18,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917550581] [2021-06-06 00:13:18,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:18,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:18,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917550581] [2021-06-06 00:13:18,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917550581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:18,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608518102] [2021-06-06 00:13:18,272 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 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 [2021-06-06 00:13:18,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:13:18,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:18,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:18,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:18,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608518102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:18,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:18,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:13:18,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472780705] [2021-06-06 00:13:18,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:18,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:18,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:18,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:18,386 INFO L87 Difference]: Start difference. First operand 3096 states and 10879 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:19,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:19,088 INFO L93 Difference]: Finished difference Result 5031 states and 15895 transitions. [2021-06-06 00:13:19,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:13:19,088 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:19,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:19,095 INFO L225 Difference]: With dead ends: 5031 [2021-06-06 00:13:19,095 INFO L226 Difference]: Without dead ends: 5005 [2021-06-06 00:13:19,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 449.8ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:13:19,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5005 states. [2021-06-06 00:13:19,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5005 to 3120. [2021-06-06 00:13:19,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 3119 states have (on average 3.521000320615582) internal successors, (10982), 3119 states have internal predecessors, (10982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:19,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 10982 transitions. [2021-06-06 00:13:19,153 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 10982 transitions. Word has length 28 [2021-06-06 00:13:19,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:19,153 INFO L482 AbstractCegarLoop]: Abstraction has 3120 states and 10982 transitions. [2021-06-06 00:13:19,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:19,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 10982 transitions. [2021-06-06 00:13:19,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:19,157 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:19,157 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:19,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3905 [2021-06-06 00:13:19,361 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:19,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:19,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1694477061, now seen corresponding path program 59 times [2021-06-06 00:13:19,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:19,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889365746] [2021-06-06 00:13:19,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:19,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:19,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889365746] [2021-06-06 00:13:19,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889365746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:19,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989061879] [2021-06-06 00:13:19,396 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 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 [2021-06-06 00:13:19,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:13:19,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:19,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:19,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:19,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989061879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:19,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:19,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:13:19,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036384549] [2021-06-06 00:13:19,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:19,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:19,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:19,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:19,513 INFO L87 Difference]: Start difference. First operand 3120 states and 10982 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:20,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:20,222 INFO L93 Difference]: Finished difference Result 5035 states and 15933 transitions. [2021-06-06 00:13:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:13:20,223 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:20,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:20,230 INFO L225 Difference]: With dead ends: 5035 [2021-06-06 00:13:20,230 INFO L226 Difference]: Without dead ends: 5029 [2021-06-06 00:13:20,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 444.4ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:13:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5029 states. [2021-06-06 00:13:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5029 to 3123. [2021-06-06 00:13:20,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 3.5153747597693785) internal successors, (10975), 3122 states have internal predecessors, (10975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:20,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 10975 transitions. [2021-06-06 00:13:20,287 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 10975 transitions. Word has length 28 [2021-06-06 00:13:20,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:20,288 INFO L482 AbstractCegarLoop]: Abstraction has 3123 states and 10975 transitions. [2021-06-06 00:13:20,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:20,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 10975 transitions. [2021-06-06 00:13:20,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:20,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:20,292 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:20,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3906 [2021-06-06 00:13:20,504 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:20,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:20,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1551691313, now seen corresponding path program 60 times [2021-06-06 00:13:20,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:20,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553962736] [2021-06-06 00:13:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:20,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:20,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553962736] [2021-06-06 00:13:20,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553962736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:20,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236472862] [2021-06-06 00:13:20,539 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 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 [2021-06-06 00:13:20,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:13:20,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:20,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:20,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:20,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236472862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:20,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:20,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:13:20,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642129861] [2021-06-06 00:13:20,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:20,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:20,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:20,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:20,638 INFO L87 Difference]: Start difference. First operand 3123 states and 10975 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:21,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:21,185 INFO L93 Difference]: Finished difference Result 5805 states and 18700 transitions. [2021-06-06 00:13:21,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:13:21,185 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:21,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:21,193 INFO L225 Difference]: With dead ends: 5805 [2021-06-06 00:13:21,193 INFO L226 Difference]: Without dead ends: 5722 [2021-06-06 00:13:21,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 315.9ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:13:21,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5722 states. [2021-06-06 00:13:21,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5722 to 3270. [2021-06-06 00:13:21,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3270 states, 3269 states have (on average 3.5460385438972164) internal successors, (11592), 3269 states have internal predecessors, (11592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3270 states to 3270 states and 11592 transitions. [2021-06-06 00:13:21,267 INFO L78 Accepts]: Start accepts. Automaton has 3270 states and 11592 transitions. Word has length 28 [2021-06-06 00:13:21,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:21,267 INFO L482 AbstractCegarLoop]: Abstraction has 3270 states and 11592 transitions. [2021-06-06 00:13:21,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:21,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3270 states and 11592 transitions. [2021-06-06 00:13:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:21,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:21,272 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:21,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3907 [2021-06-06 00:13:21,472 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:21,472 INFO L82 PathProgramCache]: Analyzing trace with hash -659497231, now seen corresponding path program 61 times [2021-06-06 00:13:21,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:21,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839735327] [2021-06-06 00:13:21,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:21,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:21,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:21,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839735327] [2021-06-06 00:13:21,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839735327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:21,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802512233] [2021-06-06 00:13:21,497 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 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 [2021-06-06 00:13:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:21,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:13:21,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:21,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802512233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:21,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:21,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:13:21,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352032961] [2021-06-06 00:13:21,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:13:21,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:21,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:13:21,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:13:21,586 INFO L87 Difference]: Start difference. First operand 3270 states and 11592 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:21,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:21,744 INFO L93 Difference]: Finished difference Result 4551 states and 15064 transitions. [2021-06-06 00:13:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:13:21,745 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:21,751 INFO L225 Difference]: With dead ends: 4551 [2021-06-06 00:13:21,751 INFO L226 Difference]: Without dead ends: 4551 [2021-06-06 00:13:21,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:13:21,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2021-06-06 00:13:21,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 3038. [2021-06-06 00:13:21,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 3.5284820546592033) internal successors, (10716), 3037 states have internal predecessors, (10716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 10716 transitions. [2021-06-06 00:13:21,796 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 10716 transitions. Word has length 28 [2021-06-06 00:13:21,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:21,796 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 10716 transitions. [2021-06-06 00:13:21,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 10716 transitions. [2021-06-06 00:13:21,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:21,800 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:21,800 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:22,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3908 [2021-06-06 00:13:22,001 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:22,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:22,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2006178797, now seen corresponding path program 62 times [2021-06-06 00:13:22,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:22,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462732702] [2021-06-06 00:13:22,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:22,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:22,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462732702] [2021-06-06 00:13:22,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462732702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:22,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416623199] [2021-06-06 00:13:22,039 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 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 [2021-06-06 00:13:22,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:22,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:22,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:22,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:22,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416623199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:22,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:22,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:13:22,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882759957] [2021-06-06 00:13:22,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:22,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:22,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:22,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:22,146 INFO L87 Difference]: Start difference. First operand 3038 states and 10716 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:22,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:22,790 INFO L93 Difference]: Finished difference Result 6432 states and 20472 transitions. [2021-06-06 00:13:22,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:13:22,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:22,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:22,799 INFO L225 Difference]: With dead ends: 6432 [2021-06-06 00:13:22,799 INFO L226 Difference]: Without dead ends: 6432 [2021-06-06 00:13:22,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 383.9ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:13:22,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6432 states. [2021-06-06 00:13:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6432 to 3056. [2021-06-06 00:13:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 3055 states have (on average 3.528314238952537) internal successors, (10779), 3055 states have internal predecessors, (10779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:22,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 10779 transitions. [2021-06-06 00:13:22,859 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 10779 transitions. Word has length 28 [2021-06-06 00:13:22,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:22,859 INFO L482 AbstractCegarLoop]: Abstraction has 3056 states and 10779 transitions. [2021-06-06 00:13:22,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:22,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 10779 transitions. [2021-06-06 00:13:22,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:22,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:22,863 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:23,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3909,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:23,084 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:23,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1221264703, now seen corresponding path program 63 times [2021-06-06 00:13:23,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:23,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392359083] [2021-06-06 00:13:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:23,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:23,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392359083] [2021-06-06 00:13:23,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392359083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:23,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948153209] [2021-06-06 00:13:23,134 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 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 [2021-06-06 00:13:23,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:13:23,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:23,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:23,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:23,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948153209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:23,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:23,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:13:23,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380650304] [2021-06-06 00:13:23,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:23,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:23,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:23,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:23,249 INFO L87 Difference]: Start difference. First operand 3056 states and 10779 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:24,069 INFO L93 Difference]: Finished difference Result 6687 states and 21252 transitions. [2021-06-06 00:13:24,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:13:24,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:24,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:24,078 INFO L225 Difference]: With dead ends: 6687 [2021-06-06 00:13:24,078 INFO L226 Difference]: Without dead ends: 6687 [2021-06-06 00:13:24,078 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 436.7ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-06 00:13:24,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6687 states. [2021-06-06 00:13:24,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6687 to 3150. [2021-06-06 00:13:24,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3150 states, 3149 states have (on average 3.520482692918387) internal successors, (11086), 3149 states have internal predecessors, (11086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3150 states to 3150 states and 11086 transitions. [2021-06-06 00:13:24,140 INFO L78 Accepts]: Start accepts. Automaton has 3150 states and 11086 transitions. Word has length 28 [2021-06-06 00:13:24,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:24,140 INFO L482 AbstractCegarLoop]: Abstraction has 3150 states and 11086 transitions. [2021-06-06 00:13:24,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3150 states and 11086 transitions. [2021-06-06 00:13:24,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:24,144 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:24,144 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:24,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3910,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:24,345 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:24,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:24,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1990679937, now seen corresponding path program 64 times [2021-06-06 00:13:24,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:24,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892836882] [2021-06-06 00:13:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:24,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:24,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892836882] [2021-06-06 00:13:24,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892836882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:24,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961531103] [2021-06-06 00:13:24,378 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 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 [2021-06-06 00:13:24,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:13:24,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:24,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:24,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:24,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961531103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:24,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:24,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:13:24,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230532444] [2021-06-06 00:13:24,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:24,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:24,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:24,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:24,470 INFO L87 Difference]: Start difference. First operand 3150 states and 11086 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:25,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:25,086 INFO L93 Difference]: Finished difference Result 6847 states and 21782 transitions. [2021-06-06 00:13:25,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:13:25,086 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:25,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:25,095 INFO L225 Difference]: With dead ends: 6847 [2021-06-06 00:13:25,095 INFO L226 Difference]: Without dead ends: 6811 [2021-06-06 00:13:25,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 353.2ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:13:25,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6811 states. [2021-06-06 00:13:25,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6811 to 3552. [2021-06-06 00:13:25,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3552 states, 3551 states have (on average 3.5457617572514786) internal successors, (12591), 3551 states have internal predecessors, (12591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:25,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 12591 transitions. [2021-06-06 00:13:25,166 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 12591 transitions. Word has length 28 [2021-06-06 00:13:25,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:25,166 INFO L482 AbstractCegarLoop]: Abstraction has 3552 states and 12591 transitions. [2021-06-06 00:13:25,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:25,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 12591 transitions. [2021-06-06 00:13:25,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:25,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:25,171 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:25,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3911,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:25,371 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:25,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:25,371 INFO L82 PathProgramCache]: Analyzing trace with hash -833209241, now seen corresponding path program 65 times [2021-06-06 00:13:25,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:25,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148016379] [2021-06-06 00:13:25,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:25,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:25,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148016379] [2021-06-06 00:13:25,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148016379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:25,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328168133] [2021-06-06 00:13:25,404 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 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 [2021-06-06 00:13:25,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:13:25,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:25,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:25,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:25,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328168133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:25,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:25,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:13:25,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424771850] [2021-06-06 00:13:25,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:25,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:25,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:25,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:25,501 INFO L87 Difference]: Start difference. First operand 3552 states and 12591 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:26,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:26,085 INFO L93 Difference]: Finished difference Result 7020 states and 22256 transitions. [2021-06-06 00:13:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:13:26,086 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:26,094 INFO L225 Difference]: With dead ends: 7020 [2021-06-06 00:13:26,094 INFO L226 Difference]: Without dead ends: 7020 [2021-06-06 00:13:26,094 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:13:26,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7020 states. [2021-06-06 00:13:26,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7020 to 3265. [2021-06-06 00:13:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3265 states, 3264 states have (on average 3.5082720588235294) internal successors, (11451), 3264 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:26,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3265 states to 3265 states and 11451 transitions. [2021-06-06 00:13:26,195 INFO L78 Accepts]: Start accepts. Automaton has 3265 states and 11451 transitions. Word has length 28 [2021-06-06 00:13:26,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:26,195 INFO L482 AbstractCegarLoop]: Abstraction has 3265 states and 11451 transitions. [2021-06-06 00:13:26,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3265 states and 11451 transitions. [2021-06-06 00:13:26,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:26,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:26,200 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:26,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3912,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:26,400 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:26,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:26,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1266085845, now seen corresponding path program 66 times [2021-06-06 00:13:26,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:26,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444447999] [2021-06-06 00:13:26,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:26,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:26,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444447999] [2021-06-06 00:13:26,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444447999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:26,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075547152] [2021-06-06 00:13:26,460 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 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 [2021-06-06 00:13:26,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:13:26,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:26,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:26,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:26,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075547152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:26,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:26,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:13:26,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933442918] [2021-06-06 00:13:26,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:26,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:26,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:26,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:26,589 INFO L87 Difference]: Start difference. First operand 3265 states and 11451 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:27,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:27,312 INFO L93 Difference]: Finished difference Result 6180 states and 19991 transitions. [2021-06-06 00:13:27,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-06 00:13:27,312 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:27,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:27,323 INFO L225 Difference]: With dead ends: 6180 [2021-06-06 00:13:27,323 INFO L226 Difference]: Without dead ends: 6176 [2021-06-06 00:13:27,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 429.5ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-06 00:13:27,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2021-06-06 00:13:27,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 3025. [2021-06-06 00:13:27,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 3.5327380952380953) internal successors, (10683), 3024 states have internal predecessors, (10683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:27,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 10683 transitions. [2021-06-06 00:13:27,390 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 10683 transitions. Word has length 28 [2021-06-06 00:13:27,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:27,390 INFO L482 AbstractCegarLoop]: Abstraction has 3025 states and 10683 transitions. [2021-06-06 00:13:27,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:27,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 10683 transitions. [2021-06-06 00:13:27,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:27,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:27,394 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:27,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3913 [2021-06-06 00:13:27,594 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:27,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:27,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1538095035, now seen corresponding path program 67 times [2021-06-06 00:13:27,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:27,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945637390] [2021-06-06 00:13:27,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:27,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:27,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945637390] [2021-06-06 00:13:27,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945637390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:27,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909285547] [2021-06-06 00:13:27,629 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 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 [2021-06-06 00:13:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:27,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:27,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:27,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909285547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:27,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:27,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:13:27,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088194274] [2021-06-06 00:13:27,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:27,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:27,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:27,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:27,745 INFO L87 Difference]: Start difference. First operand 3025 states and 10683 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:28,736 INFO L93 Difference]: Finished difference Result 9433 states and 30825 transitions. [2021-06-06 00:13:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:13:28,737 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:28,751 INFO L225 Difference]: With dead ends: 9433 [2021-06-06 00:13:28,751 INFO L226 Difference]: Without dead ends: 9433 [2021-06-06 00:13:28,752 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 596.2ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:13:28,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9433 states. [2021-06-06 00:13:28,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9433 to 3201. [2021-06-06 00:13:28,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 3.6003125) internal successors, (11521), 3200 states have internal predecessors, (11521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:28,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 11521 transitions. [2021-06-06 00:13:28,857 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 11521 transitions. Word has length 28 [2021-06-06 00:13:28,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:28,857 INFO L482 AbstractCegarLoop]: Abstraction has 3201 states and 11521 transitions. [2021-06-06 00:13:28,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:28,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 11521 transitions. [2021-06-06 00:13:28,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:28,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:28,861 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:29,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3914 [2021-06-06 00:13:29,061 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:29,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:29,062 INFO L82 PathProgramCache]: Analyzing trace with hash -971142955, now seen corresponding path program 68 times [2021-06-06 00:13:29,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:29,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558632556] [2021-06-06 00:13:29,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:29,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:29,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558632556] [2021-06-06 00:13:29,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558632556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:29,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718584916] [2021-06-06 00:13:29,096 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 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 [2021-06-06 00:13:29,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:29,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:29,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:29,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:29,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718584916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:29,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:29,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:13:29,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921584485] [2021-06-06 00:13:29,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:29,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:29,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:29,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:29,212 INFO L87 Difference]: Start difference. First operand 3201 states and 11521 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:30,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:30,208 INFO L93 Difference]: Finished difference Result 9262 states and 30360 transitions. [2021-06-06 00:13:30,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:13:30,208 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:30,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:30,223 INFO L225 Difference]: With dead ends: 9262 [2021-06-06 00:13:30,223 INFO L226 Difference]: Without dead ends: 9262 [2021-06-06 00:13:30,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 591.5ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:13:30,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9262 states. [2021-06-06 00:13:30,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9262 to 3173. [2021-06-06 00:13:30,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 3172 states have (on average 3.5851197982345524) internal successors, (11372), 3172 states have internal predecessors, (11372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 11372 transitions. [2021-06-06 00:13:30,308 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 11372 transitions. Word has length 28 [2021-06-06 00:13:30,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:30,308 INFO L482 AbstractCegarLoop]: Abstraction has 3173 states and 11372 transitions. [2021-06-06 00:13:30,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:30,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 11372 transitions. [2021-06-06 00:13:30,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:30,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:30,313 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:30,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3915,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:30,513 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:30,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:30,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2143488813, now seen corresponding path program 69 times [2021-06-06 00:13:30,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:30,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802861454] [2021-06-06 00:13:30,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:30,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:30,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802861454] [2021-06-06 00:13:30,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802861454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:30,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938724296] [2021-06-06 00:13:30,547 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 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 [2021-06-06 00:13:30,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:13:30,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:30,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:30,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:30,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938724296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:30,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:30,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:13:30,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577028805] [2021-06-06 00:13:30,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:30,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:30,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:30,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:30,653 INFO L87 Difference]: Start difference. First operand 3173 states and 11372 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-06 00:13:31,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:31,583 INFO L93 Difference]: Finished difference Result 8699 states and 27601 transitions. [2021-06-06 00:13:31,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-06 00:13:31,584 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-06-06 00:13:31,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:31,595 INFO L225 Difference]: With dead ends: 8699 [2021-06-06 00:13:31,596 INFO L226 Difference]: Without dead ends: 8699 [2021-06-06 00:13:31,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 517.7ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:13:31,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8699 states. [2021-06-06 00:13:31,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8699 to 3193. [2021-06-06 00:13:31,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3193 states, 3192 states have (on average 3.588345864661654) internal successors, (11454), 3192 states have internal predecessors, (11454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:31,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3193 states to 3193 states and 11454 transitions. [2021-06-06 00:13:31,673 INFO L78 Accepts]: Start accepts. Automaton has 3193 states and 11454 transitions. Word has length 28 [2021-06-06 00:13:31,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:31,673 INFO L482 AbstractCegarLoop]: Abstraction has 3193 states and 11454 transitions. [2021-06-06 00:13:31,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-06 00:13:31,673 INFO L276 IsEmpty]: Start isEmpty. Operand 3193 states and 11454 transitions. [2021-06-06 00:13:31,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:31,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:31,677 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:31,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3916 [2021-06-06 00:13:31,877 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:31,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:31,878 INFO L82 PathProgramCache]: Analyzing trace with hash -2062112725, now seen corresponding path program 70 times [2021-06-06 00:13:31,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:31,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724994656] [2021-06-06 00:13:31,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:31,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:31,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724994656] [2021-06-06 00:13:31,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724994656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:31,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505927072] [2021-06-06 00:13:31,911 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 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 [2021-06-06 00:13:31,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:13:31,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:31,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:31,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:32,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505927072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:32,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:32,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:13:32,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700239694] [2021-06-06 00:13:32,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:32,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:32,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:32,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:32,011 INFO L87 Difference]: Start difference. First operand 3193 states and 11454 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-06 00:13:32,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:32,890 INFO L93 Difference]: Finished difference Result 8208 states and 26413 transitions. [2021-06-06 00:13:32,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-06 00:13:32,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-06-06 00:13:32,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:32,903 INFO L225 Difference]: With dead ends: 8208 [2021-06-06 00:13:32,903 INFO L226 Difference]: Without dead ends: 8200 [2021-06-06 00:13:32,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 477.0ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:13:32,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8200 states. [2021-06-06 00:13:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8200 to 3175. [2021-06-06 00:13:32,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 3.584436042848141) internal successors, (11377), 3174 states have internal predecessors, (11377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:32,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 11377 transitions. [2021-06-06 00:13:32,983 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 11377 transitions. Word has length 28 [2021-06-06 00:13:32,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:32,983 INFO L482 AbstractCegarLoop]: Abstraction has 3175 states and 11377 transitions. [2021-06-06 00:13:32,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-06 00:13:32,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 11377 transitions. [2021-06-06 00:13:32,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:32,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:32,987 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:33,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3917 [2021-06-06 00:13:33,187 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:33,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:33,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1131455509, now seen corresponding path program 71 times [2021-06-06 00:13:33,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:33,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577745020] [2021-06-06 00:13:33,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:33,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:33,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577745020] [2021-06-06 00:13:33,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577745020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:33,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212424534] [2021-06-06 00:13:33,223 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 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 [2021-06-06 00:13:33,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:13:33,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:33,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:33,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:33,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212424534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:33,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:33,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:13:33,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024955239] [2021-06-06 00:13:33,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:33,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:33,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:33,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:33,343 INFO L87 Difference]: Start difference. First operand 3175 states and 11377 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:34,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:34,285 INFO L93 Difference]: Finished difference Result 8126 states and 26160 transitions. [2021-06-06 00:13:34,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-06 00:13:34,285 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:34,297 INFO L225 Difference]: With dead ends: 8126 [2021-06-06 00:13:34,298 INFO L226 Difference]: Without dead ends: 8126 [2021-06-06 00:13:34,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 548.0ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:13:34,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8126 states. [2021-06-06 00:13:34,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8126 to 3191. [2021-06-06 00:13:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3190 states have (on average 3.5865203761755486) internal successors, (11441), 3190 states have internal predecessors, (11441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:34,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 11441 transitions. [2021-06-06 00:13:34,373 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 11441 transitions. Word has length 28 [2021-06-06 00:13:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:34,373 INFO L482 AbstractCegarLoop]: Abstraction has 3191 states and 11441 transitions. [2021-06-06 00:13:34,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:34,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 11441 transitions. [2021-06-06 00:13:34,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:34,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:34,377 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:34,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3918 [2021-06-06 00:13:34,578 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:34,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:34,578 INFO L82 PathProgramCache]: Analyzing trace with hash 511583645, now seen corresponding path program 72 times [2021-06-06 00:13:34,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:34,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561846731] [2021-06-06 00:13:34,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:34,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:34,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561846731] [2021-06-06 00:13:34,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561846731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:34,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500927805] [2021-06-06 00:13:34,612 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 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 [2021-06-06 00:13:34,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:13:34,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:34,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:34,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:34,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500927805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:34,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:34,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:13:34,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603007711] [2021-06-06 00:13:34,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:34,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:34,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:34,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:34,722 INFO L87 Difference]: Start difference. First operand 3191 states and 11441 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:35,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:35,692 INFO L93 Difference]: Finished difference Result 7794 states and 25376 transitions. [2021-06-06 00:13:35,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:13:35,693 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:35,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:35,704 INFO L225 Difference]: With dead ends: 7794 [2021-06-06 00:13:35,705 INFO L226 Difference]: Without dead ends: 7786 [2021-06-06 00:13:35,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 509.0ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:13:35,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7786 states. [2021-06-06 00:13:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7786 to 2948. [2021-06-06 00:13:35,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 3.508313539192399) internal successors, (10339), 2947 states have internal predecessors, (10339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 10339 transitions. [2021-06-06 00:13:35,775 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 10339 transitions. Word has length 28 [2021-06-06 00:13:35,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:35,775 INFO L482 AbstractCegarLoop]: Abstraction has 2948 states and 10339 transitions. [2021-06-06 00:13:35,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 10339 transitions. [2021-06-06 00:13:35,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:35,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:35,779 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:35,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3919 [2021-06-06 00:13:35,979 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:35,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:35,979 INFO L82 PathProgramCache]: Analyzing trace with hash 594987225, now seen corresponding path program 73 times [2021-06-06 00:13:35,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:35,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283343194] [2021-06-06 00:13:35,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:36,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:36,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283343194] [2021-06-06 00:13:36,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283343194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:36,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750161582] [2021-06-06 00:13:36,014 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 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 [2021-06-06 00:13:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:36,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:36,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:36,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750161582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:36,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:36,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:13:36,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999936945] [2021-06-06 00:13:36,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:13:36,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:36,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:13:36,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:13:36,132 INFO L87 Difference]: Start difference. First operand 2948 states and 10339 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:13:36,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:36,960 INFO L93 Difference]: Finished difference Result 6003 states and 19292 transitions. [2021-06-06 00:13:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:13:36,961 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-06 00:13:36,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:36,969 INFO L225 Difference]: With dead ends: 6003 [2021-06-06 00:13:36,969 INFO L226 Difference]: Without dead ends: 6003 [2021-06-06 00:13:36,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 527.7ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:13:36,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6003 states. [2021-06-06 00:13:37,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6003 to 2960. [2021-06-06 00:13:37,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2960 states, 2959 states have (on average 3.5069280162216967) internal successors, (10377), 2959 states have internal predecessors, (10377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:37,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2960 states to 2960 states and 10377 transitions. [2021-06-06 00:13:37,025 INFO L78 Accepts]: Start accepts. Automaton has 2960 states and 10377 transitions. Word has length 28 [2021-06-06 00:13:37,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:37,025 INFO L482 AbstractCegarLoop]: Abstraction has 2960 states and 10377 transitions. [2021-06-06 00:13:37,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:13:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2960 states and 10377 transitions. [2021-06-06 00:13:37,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:37,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:37,028 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:37,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3920,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:37,229 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:37,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:37,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2046619895, now seen corresponding path program 74 times [2021-06-06 00:13:37,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:37,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145110796] [2021-06-06 00:13:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:37,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:37,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145110796] [2021-06-06 00:13:37,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145110796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:37,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788190257] [2021-06-06 00:13:37,266 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 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 [2021-06-06 00:13:37,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:37,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:37,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:37,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:37,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788190257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:37,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:37,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:13:37,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239703654] [2021-06-06 00:13:37,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:37,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:37,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:37,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:37,394 INFO L87 Difference]: Start difference. First operand 2960 states and 10377 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:38,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:38,522 INFO L93 Difference]: Finished difference Result 6789 states and 21302 transitions. [2021-06-06 00:13:38,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-06 00:13:38,523 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:38,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:38,533 INFO L225 Difference]: With dead ends: 6789 [2021-06-06 00:13:38,533 INFO L226 Difference]: Without dead ends: 6789 [2021-06-06 00:13:38,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 690.6ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-06 00:13:38,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6789 states. [2021-06-06 00:13:38,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6789 to 3026. [2021-06-06 00:13:38,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3025 states have (on average 3.5021487603305785) internal successors, (10594), 3025 states have internal predecessors, (10594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:38,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 10594 transitions. [2021-06-06 00:13:38,601 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 10594 transitions. Word has length 28 [2021-06-06 00:13:38,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:38,601 INFO L482 AbstractCegarLoop]: Abstraction has 3026 states and 10594 transitions. [2021-06-06 00:13:38,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:38,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 10594 transitions. [2021-06-06 00:13:38,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:38,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:38,604 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:38,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3921,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:38,805 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:38,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:38,805 INFO L82 PathProgramCache]: Analyzing trace with hash -403580741, now seen corresponding path program 75 times [2021-06-06 00:13:38,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:38,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021271947] [2021-06-06 00:13:38,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:38,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:38,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021271947] [2021-06-06 00:13:38,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021271947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:38,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405476751] [2021-06-06 00:13:38,842 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 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 [2021-06-06 00:13:38,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:13:38,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:38,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:38,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:38,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:38,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405476751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:38,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:38,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:13:38,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749442348] [2021-06-06 00:13:38,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:38,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:38,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:38,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:38,969 INFO L87 Difference]: Start difference. First operand 3026 states and 10594 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:40,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:40,004 INFO L93 Difference]: Finished difference Result 6345 states and 20138 transitions. [2021-06-06 00:13:40,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:13:40,004 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:40,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:40,013 INFO L225 Difference]: With dead ends: 6345 [2021-06-06 00:13:40,014 INFO L226 Difference]: Without dead ends: 6341 [2021-06-06 00:13:40,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 619.4ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:13:40,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6341 states. [2021-06-06 00:13:40,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6341 to 2952. [2021-06-06 00:13:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 3.4984750931887496) internal successors, (10324), 2951 states have internal predecessors, (10324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 10324 transitions. [2021-06-06 00:13:40,074 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 10324 transitions. Word has length 28 [2021-06-06 00:13:40,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:40,074 INFO L482 AbstractCegarLoop]: Abstraction has 2952 states and 10324 transitions. [2021-06-06 00:13:40,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:40,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 10324 transitions. [2021-06-06 00:13:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:40,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:40,078 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:40,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3922 [2021-06-06 00:13:40,278 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:40,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:40,279 INFO L82 PathProgramCache]: Analyzing trace with hash 175862483, now seen corresponding path program 67 times [2021-06-06 00:13:40,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:40,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312943988] [2021-06-06 00:13:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:40,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:40,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312943988] [2021-06-06 00:13:40,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312943988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:40,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74589508] [2021-06-06 00:13:40,322 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 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 [2021-06-06 00:13:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:40,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:40,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:40,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74589508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:40,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:40,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:13:40,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845540767] [2021-06-06 00:13:40,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:40,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:40,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:40,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:40,421 INFO L87 Difference]: Start difference. First operand 2952 states and 10324 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:40,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:40,998 INFO L93 Difference]: Finished difference Result 5472 states and 17679 transitions. [2021-06-06 00:13:40,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:13:40,998 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:41,005 INFO L225 Difference]: With dead ends: 5472 [2021-06-06 00:13:41,006 INFO L226 Difference]: Without dead ends: 5472 [2021-06-06 00:13:41,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 330.3ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:13:41,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5472 states. [2021-06-06 00:13:41,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5472 to 2952. [2021-06-06 00:13:41,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 3.5005083022704166) internal successors, (10330), 2951 states have internal predecessors, (10330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:41,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 10330 transitions. [2021-06-06 00:13:41,054 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 10330 transitions. Word has length 28 [2021-06-06 00:13:41,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:41,054 INFO L482 AbstractCegarLoop]: Abstraction has 2952 states and 10330 transitions. [2021-06-06 00:13:41,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:41,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 10330 transitions. [2021-06-06 00:13:41,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:41,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:41,058 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:41,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3923 [2021-06-06 00:13:41,258 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:41,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:41,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1435937279, now seen corresponding path program 68 times [2021-06-06 00:13:41,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:41,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235860519] [2021-06-06 00:13:41,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:41,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:41,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235860519] [2021-06-06 00:13:41,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235860519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:41,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043921840] [2021-06-06 00:13:41,299 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 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 [2021-06-06 00:13:41,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:41,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:41,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:41,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:41,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043921840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:41,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:41,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:13:41,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216145238] [2021-06-06 00:13:41,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:41,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:41,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:41,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:41,398 INFO L87 Difference]: Start difference. First operand 2952 states and 10330 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:42,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:42,151 INFO L93 Difference]: Finished difference Result 5809 states and 18633 transitions. [2021-06-06 00:13:42,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:13:42,151 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:42,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:42,160 INFO L225 Difference]: With dead ends: 5809 [2021-06-06 00:13:42,160 INFO L226 Difference]: Without dead ends: 5809 [2021-06-06 00:13:42,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 450.3ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-06 00:13:42,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5809 states. [2021-06-06 00:13:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5809 to 2943. [2021-06-06 00:13:42,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2943 states, 2942 states have (on average 3.500679809653297) internal successors, (10299), 2942 states have internal predecessors, (10299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2943 states to 2943 states and 10299 transitions. [2021-06-06 00:13:42,215 INFO L78 Accepts]: Start accepts. Automaton has 2943 states and 10299 transitions. Word has length 28 [2021-06-06 00:13:42,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:42,216 INFO L482 AbstractCegarLoop]: Abstraction has 2943 states and 10299 transitions. [2021-06-06 00:13:42,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:42,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2943 states and 10299 transitions. [2021-06-06 00:13:42,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:42,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:42,219 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:42,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3924,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:42,421 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:42,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:42,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1667476927, now seen corresponding path program 69 times [2021-06-06 00:13:42,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:42,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372856199] [2021-06-06 00:13:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:42,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:42,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372856199] [2021-06-06 00:13:42,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372856199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:42,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027926270] [2021-06-06 00:13:42,461 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 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 [2021-06-06 00:13:42,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:13:42,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:42,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:42,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:42,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027926270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:42,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:42,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:13:42,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662767601] [2021-06-06 00:13:42,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:42,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:42,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:42,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:42,562 INFO L87 Difference]: Start difference. First operand 2943 states and 10299 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:43,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:43,424 INFO L93 Difference]: Finished difference Result 6283 states and 19914 transitions. [2021-06-06 00:13:43,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-06 00:13:43,424 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:43,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:43,433 INFO L225 Difference]: With dead ends: 6283 [2021-06-06 00:13:43,433 INFO L226 Difference]: Without dead ends: 6283 [2021-06-06 00:13:43,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 502.5ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:13:43,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6283 states. [2021-06-06 00:13:43,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6283 to 3003. [2021-06-06 00:13:43,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 3.4966688874083944) internal successors, (10497), 3002 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:43,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 10497 transitions. [2021-06-06 00:13:43,496 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 10497 transitions. Word has length 28 [2021-06-06 00:13:43,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:43,496 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 10497 transitions. [2021-06-06 00:13:43,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:43,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 10497 transitions. [2021-06-06 00:13:43,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:43,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:43,499 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:43,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3925 [2021-06-06 00:13:43,700 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:43,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:43,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1647761113, now seen corresponding path program 70 times [2021-06-06 00:13:43,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:43,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787710683] [2021-06-06 00:13:43,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:43,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:43,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787710683] [2021-06-06 00:13:43,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787710683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:43,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869928362] [2021-06-06 00:13:43,734 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 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 [2021-06-06 00:13:43,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:13:43,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:43,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:43,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:43,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869928362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:43,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:43,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-06 00:13:43,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893021263] [2021-06-06 00:13:43,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:13:43,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:43,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:13:43,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:13:43,859 INFO L87 Difference]: Start difference. First operand 3003 states and 10497 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:44,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:44,411 INFO L93 Difference]: Finished difference Result 7087 states and 23881 transitions. [2021-06-06 00:13:44,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:13:44,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:44,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:44,421 INFO L225 Difference]: With dead ends: 7087 [2021-06-06 00:13:44,421 INFO L226 Difference]: Without dead ends: 7087 [2021-06-06 00:13:44,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 370.7ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:13:44,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7087 states. [2021-06-06 00:13:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7087 to 4173. [2021-06-06 00:13:44,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4173 states, 4172 states have (on average 3.6116970278044103) internal successors, (15068), 4172 states have internal predecessors, (15068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:44,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4173 states to 4173 states and 15068 transitions. [2021-06-06 00:13:44,494 INFO L78 Accepts]: Start accepts. Automaton has 4173 states and 15068 transitions. Word has length 28 [2021-06-06 00:13:44,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:44,494 INFO L482 AbstractCegarLoop]: Abstraction has 4173 states and 15068 transitions. [2021-06-06 00:13:44,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:44,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4173 states and 15068 transitions. [2021-06-06 00:13:44,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:44,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:44,499 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:44,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3926 [2021-06-06 00:13:44,700 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:44,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:44,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1712298069, now seen corresponding path program 71 times [2021-06-06 00:13:44,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:44,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076757562] [2021-06-06 00:13:44,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:44,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:44,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076757562] [2021-06-06 00:13:44,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076757562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:44,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912540463] [2021-06-06 00:13:44,741 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 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 [2021-06-06 00:13:44,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:13:44,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:44,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:44,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:44,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912540463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:44,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:44,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:13:44,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632058269] [2021-06-06 00:13:44,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:44,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:44,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:44,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:44,834 INFO L87 Difference]: Start difference. First operand 4173 states and 15068 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:45,644 INFO L93 Difference]: Finished difference Result 7520 states and 25447 transitions. [2021-06-06 00:13:45,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:13:45,644 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:45,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:45,656 INFO L225 Difference]: With dead ends: 7520 [2021-06-06 00:13:45,656 INFO L226 Difference]: Without dead ends: 7516 [2021-06-06 00:13:45,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 447.8ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:13:45,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2021-06-06 00:13:45,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 4065. [2021-06-06 00:13:45,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4065 states, 4064 states have (on average 3.6205708661417324) internal successors, (14714), 4064 states have internal predecessors, (14714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:45,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4065 states to 4065 states and 14714 transitions. [2021-06-06 00:13:45,733 INFO L78 Accepts]: Start accepts. Automaton has 4065 states and 14714 transitions. Word has length 28 [2021-06-06 00:13:45,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:45,733 INFO L482 AbstractCegarLoop]: Abstraction has 4065 states and 14714 transitions. [2021-06-06 00:13:45,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 4065 states and 14714 transitions. [2021-06-06 00:13:45,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:45,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:45,738 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:45,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3927 [2021-06-06 00:13:45,939 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:45,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:45,939 INFO L82 PathProgramCache]: Analyzing trace with hash 307959399, now seen corresponding path program 76 times [2021-06-06 00:13:45,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:45,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124945560] [2021-06-06 00:13:45,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:45,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:45,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:45,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124945560] [2021-06-06 00:13:45,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124945560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:45,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696249573] [2021-06-06 00:13:45,967 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 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 [2021-06-06 00:13:45,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:13:45,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:45,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:45,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:46,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696249573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:46,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:46,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:13:46,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821165325] [2021-06-06 00:13:46,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:46,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:46,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:46,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:46,072 INFO L87 Difference]: Start difference. First operand 4065 states and 14714 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-06 00:13:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:46,913 INFO L93 Difference]: Finished difference Result 8329 states and 27951 transitions. [2021-06-06 00:13:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:13:46,914 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-06 00:13:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:46,924 INFO L225 Difference]: With dead ends: 8329 [2021-06-06 00:13:46,924 INFO L226 Difference]: Without dead ends: 8320 [2021-06-06 00:13:46,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 485.8ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:13:46,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8320 states. [2021-06-06 00:13:46,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8320 to 4505. [2021-06-06 00:13:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 4504 states have (on average 3.70892539964476) internal successors, (16705), 4504 states have internal predecessors, (16705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 16705 transitions. [2021-06-06 00:13:47,005 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 16705 transitions. Word has length 28 [2021-06-06 00:13:47,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:47,005 INFO L482 AbstractCegarLoop]: Abstraction has 4505 states and 16705 transitions. [2021-06-06 00:13:47,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-06 00:13:47,006 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 16705 transitions. [2021-06-06 00:13:47,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:47,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:47,011 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:47,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3928 [2021-06-06 00:13:47,211 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:47,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1945666497, now seen corresponding path program 77 times [2021-06-06 00:13:47,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:47,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333536591] [2021-06-06 00:13:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:47,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:47,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:47,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333536591] [2021-06-06 00:13:47,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333536591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:47,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938616] [2021-06-06 00:13:47,245 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 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 [2021-06-06 00:13:47,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:13:47,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:47,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:47,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:47,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:47,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:47,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:13:47,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364706583] [2021-06-06 00:13:47,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:47,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:47,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:47,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:47,353 INFO L87 Difference]: Start difference. First operand 4505 states and 16705 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-06 00:13:48,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:48,176 INFO L93 Difference]: Finished difference Result 8622 states and 28858 transitions. [2021-06-06 00:13:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:13:48,176 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-06 00:13:48,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:48,189 INFO L225 Difference]: With dead ends: 8622 [2021-06-06 00:13:48,189 INFO L226 Difference]: Without dead ends: 8622 [2021-06-06 00:13:48,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 476.0ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:13:48,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8622 states. [2021-06-06 00:13:48,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8622 to 4525. [2021-06-06 00:13:48,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4525 states, 4524 states have (on average 3.6965075154730327) internal successors, (16723), 4524 states have internal predecessors, (16723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:48,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4525 states to 4525 states and 16723 transitions. [2021-06-06 00:13:48,285 INFO L78 Accepts]: Start accepts. Automaton has 4525 states and 16723 transitions. Word has length 28 [2021-06-06 00:13:48,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:48,286 INFO L482 AbstractCegarLoop]: Abstraction has 4525 states and 16723 transitions. [2021-06-06 00:13:48,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-06 00:13:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 4525 states and 16723 transitions. [2021-06-06 00:13:48,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:48,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:48,292 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:48,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3929 [2021-06-06 00:13:48,493 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:48,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1145894509, now seen corresponding path program 78 times [2021-06-06 00:13:48,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:48,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593668261] [2021-06-06 00:13:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:48,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:48,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593668261] [2021-06-06 00:13:48,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593668261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:48,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806868586] [2021-06-06 00:13:48,530 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 [2021-06-06 00:13:48,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:13:48,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:48,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:48,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:48,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806868586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:48,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:48,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:13:48,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572450557] [2021-06-06 00:13:48,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:13:48,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:48,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:13:48,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:13:48,617 INFO L87 Difference]: Start difference. First operand 4525 states and 16723 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:13:49,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:49,026 INFO L93 Difference]: Finished difference Result 8054 states and 28373 transitions. [2021-06-06 00:13:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:13:49,026 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-06 00:13:49,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:49,038 INFO L225 Difference]: With dead ends: 8054 [2021-06-06 00:13:49,038 INFO L226 Difference]: Without dead ends: 7950 [2021-06-06 00:13:49,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:13:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7950 states. [2021-06-06 00:13:49,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7950 to 5973. [2021-06-06 00:13:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5973 states, 5972 states have (on average 3.7582049564634965) internal successors, (22444), 5972 states have internal predecessors, (22444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:49,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5973 states to 5973 states and 22444 transitions. [2021-06-06 00:13:49,158 INFO L78 Accepts]: Start accepts. Automaton has 5973 states and 22444 transitions. Word has length 28 [2021-06-06 00:13:49,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:49,158 INFO L482 AbstractCegarLoop]: Abstraction has 5973 states and 22444 transitions. [2021-06-06 00:13:49,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:13:49,159 INFO L276 IsEmpty]: Start isEmpty. Operand 5973 states and 22444 transitions. [2021-06-06 00:13:49,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:49,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:49,166 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:49,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3930 [2021-06-06 00:13:49,367 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:49,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:49,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1941057807, now seen corresponding path program 79 times [2021-06-06 00:13:49,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:49,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653366388] [2021-06-06 00:13:49,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:49,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:49,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653366388] [2021-06-06 00:13:49,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653366388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:49,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327465470] [2021-06-06 00:13:49,394 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:49,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:13:49,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:49,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327465470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:49,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:49,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-06 00:13:49,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165512782] [2021-06-06 00:13:49,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:13:49,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:49,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:13:49,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:13:49,470 INFO L87 Difference]: Start difference. First operand 5973 states and 22444 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:49,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:49,648 INFO L93 Difference]: Finished difference Result 8289 states and 29168 transitions. [2021-06-06 00:13:49,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:13:49,648 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:49,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:49,660 INFO L225 Difference]: With dead ends: 8289 [2021-06-06 00:13:49,661 INFO L226 Difference]: Without dead ends: 8289 [2021-06-06 00:13:49,661 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:13:49,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2021-06-06 00:13:49,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 6119. [2021-06-06 00:13:49,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6119 states, 6118 states have (on average 3.7355344883949004) internal successors, (22854), 6118 states have internal predecessors, (22854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6119 states to 6119 states and 22854 transitions. [2021-06-06 00:13:49,762 INFO L78 Accepts]: Start accepts. Automaton has 6119 states and 22854 transitions. Word has length 28 [2021-06-06 00:13:49,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:49,762 INFO L482 AbstractCegarLoop]: Abstraction has 6119 states and 22854 transitions. [2021-06-06 00:13:49,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:49,762 INFO L276 IsEmpty]: Start isEmpty. Operand 6119 states and 22854 transitions. [2021-06-06 00:13:49,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:49,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:49,771 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:49,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3931,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:49,971 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:49,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:49,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1010858063, now seen corresponding path program 80 times [2021-06-06 00:13:49,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:49,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433542567] [2021-06-06 00:13:49,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:50,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:50,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433542567] [2021-06-06 00:13:50,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433542567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:50,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479306775] [2021-06-06 00:13:50,015 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 [2021-06-06 00:13:50,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:50,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:50,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:50,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:50,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479306775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:50,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:50,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:13:50,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438622526] [2021-06-06 00:13:50,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:50,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:50,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:50,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:50,102 INFO L87 Difference]: Start difference. First operand 6119 states and 22854 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:50,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:50,820 INFO L93 Difference]: Finished difference Result 12663 states and 44044 transitions. [2021-06-06 00:13:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-06 00:13:50,820 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:50,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:50,843 INFO L225 Difference]: With dead ends: 12663 [2021-06-06 00:13:50,843 INFO L226 Difference]: Without dead ends: 12663 [2021-06-06 00:13:50,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 421.9ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:13:50,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12663 states. [2021-06-06 00:13:51,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12663 to 6788. [2021-06-06 00:13:51,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6788 states, 6787 states have (on average 3.7501105053779282) internal successors, (25452), 6787 states have internal predecessors, (25452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6788 states to 6788 states and 25452 transitions. [2021-06-06 00:13:51,024 INFO L78 Accepts]: Start accepts. Automaton has 6788 states and 25452 transitions. Word has length 28 [2021-06-06 00:13:51,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:51,024 INFO L482 AbstractCegarLoop]: Abstraction has 6788 states and 25452 transitions. [2021-06-06 00:13:51,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:51,025 INFO L276 IsEmpty]: Start isEmpty. Operand 6788 states and 25452 transitions. [2021-06-06 00:13:51,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:51,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:51,034 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:51,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3932 [2021-06-06 00:13:51,235 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:51,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:51,235 INFO L82 PathProgramCache]: Analyzing trace with hash 891821389, now seen corresponding path program 81 times [2021-06-06 00:13:51,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:51,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615663695] [2021-06-06 00:13:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:51,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:51,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615663695] [2021-06-06 00:13:51,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615663695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:51,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893300265] [2021-06-06 00:13:51,275 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 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 [2021-06-06 00:13:51,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:13:51,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:51,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:51,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:51,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893300265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:51,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:51,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-06 00:13:51,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402667734] [2021-06-06 00:13:51,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:13:51,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:51,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:13:51,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:13:51,362 INFO L87 Difference]: Start difference. First operand 6788 states and 25452 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:52,010 INFO L93 Difference]: Finished difference Result 12824 states and 44637 transitions. [2021-06-06 00:13:52,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:13:52,010 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:52,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:52,034 INFO L225 Difference]: With dead ends: 12824 [2021-06-06 00:13:52,034 INFO L226 Difference]: Without dead ends: 12824 [2021-06-06 00:13:52,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 364.8ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:13:52,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12824 states. [2021-06-06 00:13:52,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12824 to 7036. [2021-06-06 00:13:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7036 states, 7035 states have (on average 3.729637526652452) internal successors, (26238), 7035 states have internal predecessors, (26238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:52,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 26238 transitions. [2021-06-06 00:13:52,191 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 26238 transitions. Word has length 28 [2021-06-06 00:13:52,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:52,191 INFO L482 AbstractCegarLoop]: Abstraction has 7036 states and 26238 transitions. [2021-06-06 00:13:52,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:52,191 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 26238 transitions. [2021-06-06 00:13:52,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:52,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:52,201 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:52,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3933,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:52,401 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:52,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:52,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1279876851, now seen corresponding path program 82 times [2021-06-06 00:13:52,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:52,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154617084] [2021-06-06 00:13:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:52,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:52,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154617084] [2021-06-06 00:13:52,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154617084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:52,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572474117] [2021-06-06 00:13:52,429 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 [2021-06-06 00:13:52,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:13:52,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:52,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:52,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:52,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572474117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:52,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:52,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:13:52,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750866301] [2021-06-06 00:13:52,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:13:52,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:52,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:13:52,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:13:52,513 INFO L87 Difference]: Start difference. First operand 7036 states and 26238 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) 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) [2021-06-06 00:13:52,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:52,872 INFO L93 Difference]: Finished difference Result 10405 states and 36941 transitions. [2021-06-06 00:13:52,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:13:52,873 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) 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 28 [2021-06-06 00:13:52,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:52,890 INFO L225 Difference]: With dead ends: 10405 [2021-06-06 00:13:52,890 INFO L226 Difference]: Without dead ends: 10405 [2021-06-06 00:13:52,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 184.1ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:13:52,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10405 states. [2021-06-06 00:13:53,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10405 to 7946. [2021-06-06 00:13:53,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7946 states, 7945 states have (on average 3.7539332913782255) internal successors, (29825), 7945 states have internal predecessors, (29825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7946 states to 7946 states and 29825 transitions. [2021-06-06 00:13:53,062 INFO L78 Accepts]: Start accepts. Automaton has 7946 states and 29825 transitions. Word has length 28 [2021-06-06 00:13:53,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:53,062 INFO L482 AbstractCegarLoop]: Abstraction has 7946 states and 29825 transitions. [2021-06-06 00:13:53,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) 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) [2021-06-06 00:13:53,062 INFO L276 IsEmpty]: Start isEmpty. Operand 7946 states and 29825 transitions. [2021-06-06 00:13:53,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:53,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:53,073 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:53,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3934,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:53,274 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:53,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:53,274 INFO L82 PathProgramCache]: Analyzing trace with hash 847000247, now seen corresponding path program 83 times [2021-06-06 00:13:53,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:53,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595814192] [2021-06-06 00:13:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:53,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:53,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595814192] [2021-06-06 00:13:53,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595814192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:53,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228694688] [2021-06-06 00:13:53,308 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 [2021-06-06 00:13:53,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:13:53,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:53,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:53,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:13:53,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228694688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:53,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:53,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-06 00:13:53,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295580581] [2021-06-06 00:13:53,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:13:53,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:53,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:13:53,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:13:53,388 INFO L87 Difference]: Start difference. First operand 7946 states and 29825 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:53,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:53,988 INFO L93 Difference]: Finished difference Result 13522 states and 48006 transitions. [2021-06-06 00:13:53,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:13:53,989 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:53,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:54,013 INFO L225 Difference]: With dead ends: 13522 [2021-06-06 00:13:54,013 INFO L226 Difference]: Without dead ends: 13518 [2021-06-06 00:13:54,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 319.0ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:13:54,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13518 states. [2021-06-06 00:13:54,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13518 to 7858. [2021-06-06 00:13:54,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7858 states, 7857 states have (on average 3.7557591956217387) internal successors, (29509), 7857 states have internal predecessors, (29509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7858 states to 7858 states and 29509 transitions. [2021-06-06 00:13:54,186 INFO L78 Accepts]: Start accepts. Automaton has 7858 states and 29509 transitions. Word has length 28 [2021-06-06 00:13:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:54,186 INFO L482 AbstractCegarLoop]: Abstraction has 7858 states and 29509 transitions. [2021-06-06 00:13:54,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 7858 states and 29509 transitions. [2021-06-06 00:13:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:54,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:54,197 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:54,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3935 [2021-06-06 00:13:54,397 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:54,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:54,397 INFO L82 PathProgramCache]: Analyzing trace with hash -48820569, now seen corresponding path program 84 times [2021-06-06 00:13:54,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:54,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755470623] [2021-06-06 00:13:54,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:54,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:54,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755470623] [2021-06-06 00:13:54,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755470623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:54,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355861200] [2021-06-06 00:13:54,435 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 [2021-06-06 00:13:54,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:13:54,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:54,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:13:54,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:54,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355861200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:54,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:54,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:13:54,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258186650] [2021-06-06 00:13:54,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:13:54,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:54,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:13:54,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:13:54,535 INFO L87 Difference]: Start difference. First operand 7858 states and 29509 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:13:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:54,989 INFO L93 Difference]: Finished difference Result 10648 states and 37827 transitions. [2021-06-06 00:13:54,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:13:54,990 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-06 00:13:54,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:55,049 INFO L225 Difference]: With dead ends: 10648 [2021-06-06 00:13:55,049 INFO L226 Difference]: Without dead ends: 10648 [2021-06-06 00:13:55,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 239.5ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:13:55,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10648 states. [2021-06-06 00:13:55,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10648 to 7756. [2021-06-06 00:13:55,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7756 states, 7755 states have (on average 3.752675693101225) internal successors, (29102), 7755 states have internal predecessors, (29102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:55,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7756 states to 7756 states and 29102 transitions. [2021-06-06 00:13:55,181 INFO L78 Accepts]: Start accepts. Automaton has 7756 states and 29102 transitions. Word has length 28 [2021-06-06 00:13:55,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:55,181 INFO L482 AbstractCegarLoop]: Abstraction has 7756 states and 29102 transitions. [2021-06-06 00:13:55,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:13:55,181 INFO L276 IsEmpty]: Start isEmpty. Operand 7756 states and 29102 transitions. [2021-06-06 00:13:55,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:55,192 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:55,192 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:55,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3936,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:13:55,393 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:55,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:55,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1444336905, now seen corresponding path program 85 times [2021-06-06 00:13:55,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:55,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004007116] [2021-06-06 00:13:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:55,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:55,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004007116] [2021-06-06 00:13:55,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004007116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:55,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920800107] [2021-06-06 00:13:55,433 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 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 [2021-06-06 00:13:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:55,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:55,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:55,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920800107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:55,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:55,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:13:55,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141384337] [2021-06-06 00:13:55,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:13:55,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:55,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:13:55,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:13:55,514 INFO L87 Difference]: Start difference. First operand 7756 states and 29102 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:56,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:56,185 INFO L93 Difference]: Finished difference Result 13360 states and 47364 transitions. [2021-06-06 00:13:56,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:13:56,185 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:13:56,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:56,212 INFO L225 Difference]: With dead ends: 13360 [2021-06-06 00:13:56,212 INFO L226 Difference]: Without dead ends: 13348 [2021-06-06 00:13:56,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 368.3ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:13:56,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13348 states. [2021-06-06 00:13:56,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13348 to 7756. [2021-06-06 00:13:56,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7756 states, 7755 states have (on average 3.7513862024500324) internal successors, (29092), 7755 states have internal predecessors, (29092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7756 states to 7756 states and 29092 transitions. [2021-06-06 00:13:56,401 INFO L78 Accepts]: Start accepts. Automaton has 7756 states and 29092 transitions. Word has length 28 [2021-06-06 00:13:56,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:56,401 INFO L482 AbstractCegarLoop]: Abstraction has 7756 states and 29092 transitions. [2021-06-06 00:13:56,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:56,401 INFO L276 IsEmpty]: Start isEmpty. Operand 7756 states and 29092 transitions. [2021-06-06 00:13:56,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:56,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:56,413 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:56,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3937 [2021-06-06 00:13:56,613 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:56,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:56,614 INFO L82 PathProgramCache]: Analyzing trace with hash -323944011, now seen corresponding path program 86 times [2021-06-06 00:13:56,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:56,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605274520] [2021-06-06 00:13:56,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:56,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:56,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605274520] [2021-06-06 00:13:56,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605274520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:56,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613422981] [2021-06-06 00:13:56,654 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 [2021-06-06 00:13:56,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:13:56,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:56,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:56,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:56,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613422981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:56,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:56,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:13:56,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236272809] [2021-06-06 00:13:56,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:56,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:56,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:56,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:56,752 INFO L87 Difference]: Start difference. First operand 7756 states and 29092 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-06 00:13:58,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:58,010 INFO L93 Difference]: Finished difference Result 20318 states and 70854 transitions. [2021-06-06 00:13:58,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-06 00:13:58,011 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-06 00:13:58,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:58,049 INFO L225 Difference]: With dead ends: 20318 [2021-06-06 00:13:58,049 INFO L226 Difference]: Without dead ends: 20318 [2021-06-06 00:13:58,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 749.7ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-06 00:13:58,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20318 states. [2021-06-06 00:13:58,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20318 to 10596. [2021-06-06 00:13:58,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10596 states, 10595 states have (on average 3.79443133553563) internal successors, (40202), 10595 states have internal predecessors, (40202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:13:58,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10596 states to 10596 states and 40202 transitions. [2021-06-06 00:13:58,356 INFO L78 Accepts]: Start accepts. Automaton has 10596 states and 40202 transitions. Word has length 28 [2021-06-06 00:13:58,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:13:58,357 INFO L482 AbstractCegarLoop]: Abstraction has 10596 states and 40202 transitions. [2021-06-06 00:13:58,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-06 00:13:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand 10596 states and 40202 transitions. [2021-06-06 00:13:58,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:13:58,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:13:58,373 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:13:58,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3938 [2021-06-06 00:13:58,573 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:13:58,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:13:58,574 INFO L82 PathProgramCache]: Analyzing trace with hash -242567923, now seen corresponding path program 87 times [2021-06-06 00:13:58,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:13:58,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226652271] [2021-06-06 00:13:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:13:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:13:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:58,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:13:58,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226652271] [2021-06-06 00:13:58,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226652271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:58,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662366349] [2021-06-06 00:13:58,614 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 [2021-06-06 00:13:58,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:13:58,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:13:58,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:13:58,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:13:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:13:58,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662366349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:13:58,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:13:58,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:13:58,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703501098] [2021-06-06 00:13:58,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:13:58,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:13:58,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:13:58,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:13:58,706 INFO L87 Difference]: Start difference. First operand 10596 states and 40202 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-06 00:13:59,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:13:59,811 INFO L93 Difference]: Finished difference Result 19544 states and 68833 transitions. [2021-06-06 00:13:59,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:13:59,812 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-06 00:13:59,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:13:59,850 INFO L225 Difference]: With dead ends: 19544 [2021-06-06 00:13:59,850 INFO L226 Difference]: Without dead ends: 19532 [2021-06-06 00:13:59,850 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 619.1ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:13:59,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19532 states. [2021-06-06 00:14:00,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19532 to 10410. [2021-06-06 00:14:00,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10410 states, 10409 states have (on average 3.8004611393985974) internal successors, (39559), 10409 states have internal predecessors, (39559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10410 states to 10410 states and 39559 transitions. [2021-06-06 00:14:00,141 INFO L78 Accepts]: Start accepts. Automaton has 10410 states and 39559 transitions. Word has length 28 [2021-06-06 00:14:00,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:00,141 INFO L482 AbstractCegarLoop]: Abstraction has 10410 states and 39559 transitions. [2021-06-06 00:14:00,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-06 00:14:00,141 INFO L276 IsEmpty]: Start isEmpty. Operand 10410 states and 39559 transitions. [2021-06-06 00:14:00,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:00,157 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:00,157 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:00,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3939 [2021-06-06 00:14:00,357 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:00,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:00,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1757659895, now seen corresponding path program 88 times [2021-06-06 00:14:00,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:00,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540027347] [2021-06-06 00:14:00,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:00,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:00,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540027347] [2021-06-06 00:14:00,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540027347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:00,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236366691] [2021-06-06 00:14:00,398 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 [2021-06-06 00:14:00,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:14:00,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:00,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:00,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:00,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236366691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:00,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:00,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:14:00,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739658292] [2021-06-06 00:14:00,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:14:00,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:00,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:14:00,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:14:00,488 INFO L87 Difference]: Start difference. First operand 10410 states and 39559 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-06 00:14:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:01,459 INFO L93 Difference]: Finished difference Result 19373 states and 68230 transitions. [2021-06-06 00:14:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:14:01,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-06 00:14:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:01,497 INFO L225 Difference]: With dead ends: 19373 [2021-06-06 00:14:01,497 INFO L226 Difference]: Without dead ends: 19337 [2021-06-06 00:14:01,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 567.2ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:14:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19337 states. [2021-06-06 00:14:01,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19337 to 10460. [2021-06-06 00:14:01,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10460 states, 10459 states have (on average 3.798451094750932) internal successors, (39728), 10459 states have internal predecessors, (39728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:01,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10460 states to 10460 states and 39728 transitions. [2021-06-06 00:14:01,814 INFO L78 Accepts]: Start accepts. Automaton has 10460 states and 39728 transitions. Word has length 28 [2021-06-06 00:14:01,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:01,814 INFO L482 AbstractCegarLoop]: Abstraction has 10460 states and 39728 transitions. [2021-06-06 00:14:01,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-06 00:14:01,814 INFO L276 IsEmpty]: Start isEmpty. Operand 10460 states and 39728 transitions. [2021-06-06 00:14:01,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:01,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:01,829 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:02,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3940,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:02,029 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:02,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:02,029 INFO L82 PathProgramCache]: Analyzing trace with hash -160533179, now seen corresponding path program 89 times [2021-06-06 00:14:02,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:02,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845640088] [2021-06-06 00:14:02,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:02,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:02,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845640088] [2021-06-06 00:14:02,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845640088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:02,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667074323] [2021-06-06 00:14:02,070 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 [2021-06-06 00:14:02,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:14:02,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:02,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:02,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:02,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667074323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:02,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:02,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:14:02,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752761612] [2021-06-06 00:14:02,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:02,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:02,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:02,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:02,189 INFO L87 Difference]: Start difference. First operand 10460 states and 39728 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:03,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:03,602 INFO L93 Difference]: Finished difference Result 19259 states and 67953 transitions. [2021-06-06 00:14:03,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-06 00:14:03,603 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:03,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:03,639 INFO L225 Difference]: With dead ends: 19259 [2021-06-06 00:14:03,639 INFO L226 Difference]: Without dead ends: 19259 [2021-06-06 00:14:03,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 885.5ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-06 00:14:03,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19259 states. [2021-06-06 00:14:03,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19259 to 10656. [2021-06-06 00:14:03,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10656 states, 10655 states have (on average 3.7895823557015484) internal successors, (40378), 10655 states have internal predecessors, (40378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10656 states to 10656 states and 40378 transitions. [2021-06-06 00:14:03,973 INFO L78 Accepts]: Start accepts. Automaton has 10656 states and 40378 transitions. Word has length 28 [2021-06-06 00:14:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:03,973 INFO L482 AbstractCegarLoop]: Abstraction has 10656 states and 40378 transitions. [2021-06-06 00:14:03,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 10656 states and 40378 transitions. [2021-06-06 00:14:03,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:03,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:03,988 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:04,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3941,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:04,189 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:04,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:04,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1482505975, now seen corresponding path program 90 times [2021-06-06 00:14:04,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:04,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834923582] [2021-06-06 00:14:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:04,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:04,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834923582] [2021-06-06 00:14:04,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834923582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:04,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211392382] [2021-06-06 00:14:04,230 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 [2021-06-06 00:14:04,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:14:04,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:04,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:04,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:04,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211392382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:04,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:04,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:14:04,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967443168] [2021-06-06 00:14:04,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:04,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:04,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:04,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:04,345 INFO L87 Difference]: Start difference. First operand 10656 states and 40378 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:05,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:05,571 INFO L93 Difference]: Finished difference Result 18895 states and 66950 transitions. [2021-06-06 00:14:05,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-06 00:14:05,571 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:05,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:05,610 INFO L225 Difference]: With dead ends: 18895 [2021-06-06 00:14:05,610 INFO L226 Difference]: Without dead ends: 18883 [2021-06-06 00:14:05,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 761.0ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-06 00:14:05,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18883 states. [2021-06-06 00:14:05,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18883 to 10538. [2021-06-06 00:14:05,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10538 states, 10537 states have (on average 3.793964126411692) internal successors, (39977), 10537 states have internal predecessors, (39977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:05,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10538 states to 10538 states and 39977 transitions. [2021-06-06 00:14:05,874 INFO L78 Accepts]: Start accepts. Automaton has 10538 states and 39977 transitions. Word has length 28 [2021-06-06 00:14:05,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:05,875 INFO L482 AbstractCegarLoop]: Abstraction has 10538 states and 39977 transitions. [2021-06-06 00:14:05,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:05,875 INFO L276 IsEmpty]: Start isEmpty. Operand 10538 states and 39977 transitions. [2021-06-06 00:14:05,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:05,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:05,889 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:06,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3942,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:06,093 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:06,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:06,093 INFO L82 PathProgramCache]: Analyzing trace with hash 215048797, now seen corresponding path program 91 times [2021-06-06 00:14:06,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:06,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480371905] [2021-06-06 00:14:06,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:06,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:06,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480371905] [2021-06-06 00:14:06,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480371905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:06,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110207325] [2021-06-06 00:14:06,135 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 [2021-06-06 00:14:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:06,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:06,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:06,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110207325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:06,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:06,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-06 00:14:06,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761224935] [2021-06-06 00:14:06,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:14:06,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:06,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:14:06,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:14:06,235 INFO L87 Difference]: Start difference. First operand 10538 states and 39977 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:14:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:07,272 INFO L93 Difference]: Finished difference Result 18135 states and 64866 transitions. [2021-06-06 00:14:07,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:14:07,273 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-06 00:14:07,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:07,308 INFO L225 Difference]: With dead ends: 18135 [2021-06-06 00:14:07,309 INFO L226 Difference]: Without dead ends: 18099 [2021-06-06 00:14:07,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 633.3ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:14:07,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18099 states. [2021-06-06 00:14:07,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18099 to 10562. [2021-06-06 00:14:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10562 states, 10561 states have (on average 3.7929173373733547) internal successors, (40057), 10561 states have internal predecessors, (40057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:07,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10562 states to 10562 states and 40057 transitions. [2021-06-06 00:14:07,561 INFO L78 Accepts]: Start accepts. Automaton has 10562 states and 40057 transitions. Word has length 28 [2021-06-06 00:14:07,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:07,561 INFO L482 AbstractCegarLoop]: Abstraction has 10562 states and 40057 transitions. [2021-06-06 00:14:07,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:14:07,561 INFO L276 IsEmpty]: Start isEmpty. Operand 10562 states and 40057 transitions. [2021-06-06 00:14:07,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:07,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:07,577 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:07,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3943,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:07,777 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:07,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:07,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1691162673, now seen corresponding path program 92 times [2021-06-06 00:14:07,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:07,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258625048] [2021-06-06 00:14:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:07,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:07,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258625048] [2021-06-06 00:14:07,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258625048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:07,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277727249] [2021-06-06 00:14:07,812 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 [2021-06-06 00:14:07,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:14:07,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:07,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:07,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:07,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277727249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:07,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:07,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:14:07,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239189984] [2021-06-06 00:14:07,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:07,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:07,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:07,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:07,939 INFO L87 Difference]: Start difference. First operand 10562 states and 40057 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:09,287 INFO L93 Difference]: Finished difference Result 26263 states and 93462 transitions. [2021-06-06 00:14:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-06 00:14:09,287 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:09,346 INFO L225 Difference]: With dead ends: 26263 [2021-06-06 00:14:09,346 INFO L226 Difference]: Without dead ends: 26263 [2021-06-06 00:14:09,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 783.5ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-06 00:14:09,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26263 states. [2021-06-06 00:14:09,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26263 to 10852. [2021-06-06 00:14:09,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10852 states, 10851 states have (on average 3.818173440235923) internal successors, (41431), 10851 states have internal predecessors, (41431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10852 states to 10852 states and 41431 transitions. [2021-06-06 00:14:09,712 INFO L78 Accepts]: Start accepts. Automaton has 10852 states and 41431 transitions. Word has length 28 [2021-06-06 00:14:09,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:09,712 INFO L482 AbstractCegarLoop]: Abstraction has 10852 states and 41431 transitions. [2021-06-06 00:14:09,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:09,713 INFO L276 IsEmpty]: Start isEmpty. Operand 10852 states and 41431 transitions. [2021-06-06 00:14:09,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:09,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:09,730 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:09,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3944 [2021-06-06 00:14:09,930 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:09,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:09,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2036852543, now seen corresponding path program 93 times [2021-06-06 00:14:09,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:09,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728848234] [2021-06-06 00:14:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:09,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:09,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728848234] [2021-06-06 00:14:09,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728848234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:09,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032940611] [2021-06-06 00:14:09,966 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 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 [2021-06-06 00:14:09,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:14:09,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:09,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:09,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:10,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032940611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:10,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:10,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:14:10,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221854705] [2021-06-06 00:14:10,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:10,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:10,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:10,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:10,093 INFO L87 Difference]: Start difference. First operand 10852 states and 41431 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:11,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:11,356 INFO L93 Difference]: Finished difference Result 25703 states and 92092 transitions. [2021-06-06 00:14:11,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-06 00:14:11,356 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:11,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:11,412 INFO L225 Difference]: With dead ends: 25703 [2021-06-06 00:14:11,412 INFO L226 Difference]: Without dead ends: 25703 [2021-06-06 00:14:11,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 756.6ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-06 00:14:11,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25703 states. [2021-06-06 00:14:11,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25703 to 10754. [2021-06-06 00:14:11,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10754 states, 10753 states have (on average 3.8055426392634613) internal successors, (40921), 10753 states have internal predecessors, (40921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:11,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10754 states to 10754 states and 40921 transitions. [2021-06-06 00:14:11,786 INFO L78 Accepts]: Start accepts. Automaton has 10754 states and 40921 transitions. Word has length 28 [2021-06-06 00:14:11,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:11,786 INFO L482 AbstractCegarLoop]: Abstraction has 10754 states and 40921 transitions. [2021-06-06 00:14:11,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:11,786 INFO L276 IsEmpty]: Start isEmpty. Operand 10754 states and 40921 transitions. [2021-06-06 00:14:11,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:11,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:11,801 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:12,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3945 [2021-06-06 00:14:12,002 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:12,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:12,002 INFO L82 PathProgramCache]: Analyzing trace with hash 197254951, now seen corresponding path program 94 times [2021-06-06 00:14:12,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:12,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177966783] [2021-06-06 00:14:12,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:12,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:12,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177966783] [2021-06-06 00:14:12,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177966783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:12,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619601410] [2021-06-06 00:14:12,037 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 [2021-06-06 00:14:12,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:14:12,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:12,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:12,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:12,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:12,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619601410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:12,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:12,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:14:12,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783662309] [2021-06-06 00:14:12,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:14:12,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:12,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:14:12,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:14:12,151 INFO L87 Difference]: Start difference. First operand 10754 states and 40921 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:12,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:12,974 INFO L93 Difference]: Finished difference Result 20426 states and 73440 transitions. [2021-06-06 00:14:12,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-06 00:14:12,974 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:12,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:13,011 INFO L225 Difference]: With dead ends: 20426 [2021-06-06 00:14:13,012 INFO L226 Difference]: Without dead ends: 20426 [2021-06-06 00:14:13,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 463.5ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:14:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20426 states. [2021-06-06 00:14:13,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20426 to 10763. [2021-06-06 00:14:13,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10763 states, 10762 states have (on average 3.804497305333581) internal successors, (40944), 10762 states have internal predecessors, (40944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:13,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10763 states to 10763 states and 40944 transitions. [2021-06-06 00:14:13,260 INFO L78 Accepts]: Start accepts. Automaton has 10763 states and 40944 transitions. Word has length 28 [2021-06-06 00:14:13,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:13,260 INFO L482 AbstractCegarLoop]: Abstraction has 10763 states and 40944 transitions. [2021-06-06 00:14:13,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:13,260 INFO L276 IsEmpty]: Start isEmpty. Operand 10763 states and 40944 transitions. [2021-06-06 00:14:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:13,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:13,274 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:13,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3946,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:13,475 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:13,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:13,475 INFO L82 PathProgramCache]: Analyzing trace with hash -31074195, now seen corresponding path program 95 times [2021-06-06 00:14:13,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:13,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721933146] [2021-06-06 00:14:13,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:13,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:13,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721933146] [2021-06-06 00:14:13,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721933146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:13,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430784223] [2021-06-06 00:14:13,502 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 [2021-06-06 00:14:13,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:14:13,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:13,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:13,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:13,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430784223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:13,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:13,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:14:13,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443992412] [2021-06-06 00:14:13,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:14:13,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:13,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:14:13,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:14:13,582 INFO L87 Difference]: Start difference. First operand 10763 states and 40944 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) 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) [2021-06-06 00:14:13,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:13,942 INFO L93 Difference]: Finished difference Result 12782 states and 46713 transitions. [2021-06-06 00:14:13,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:14:13,942 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) 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 28 [2021-06-06 00:14:13,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:13,966 INFO L225 Difference]: With dead ends: 12782 [2021-06-06 00:14:13,966 INFO L226 Difference]: Without dead ends: 12749 [2021-06-06 00:14:13,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:14:13,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12749 states. [2021-06-06 00:14:14,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12749 to 10707. [2021-06-06 00:14:14,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10707 states, 10706 states have (on average 3.8048757705959275) internal successors, (40735), 10706 states have internal predecessors, (40735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:14,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10707 states to 10707 states and 40735 transitions. [2021-06-06 00:14:14,206 INFO L78 Accepts]: Start accepts. Automaton has 10707 states and 40735 transitions. Word has length 28 [2021-06-06 00:14:14,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:14,206 INFO L482 AbstractCegarLoop]: Abstraction has 10707 states and 40735 transitions. [2021-06-06 00:14:14,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) 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) [2021-06-06 00:14:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 10707 states and 40735 transitions. [2021-06-06 00:14:14,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:14,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:14,222 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:14,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3947 [2021-06-06 00:14:14,422 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:14,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:14,423 INFO L82 PathProgramCache]: Analyzing trace with hash -477466927, now seen corresponding path program 96 times [2021-06-06 00:14:14,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:14,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658843724] [2021-06-06 00:14:14,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:14,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:14,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658843724] [2021-06-06 00:14:14,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658843724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:14,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184344633] [2021-06-06 00:14:14,458 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 [2021-06-06 00:14:14,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:14:14,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:14,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:14,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:14,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184344633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:14,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:14,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:14:14,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326258672] [2021-06-06 00:14:14,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:14:14,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:14,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:14:14,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:14:14,603 INFO L87 Difference]: Start difference. First operand 10707 states and 40735 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:14:15,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:15,356 INFO L93 Difference]: Finished difference Result 18923 states and 68585 transitions. [2021-06-06 00:14:15,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:14:15,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-06 00:14:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:15,393 INFO L225 Difference]: With dead ends: 18923 [2021-06-06 00:14:15,393 INFO L226 Difference]: Without dead ends: 18923 [2021-06-06 00:14:15,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 439.9ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:14:15,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18923 states. [2021-06-06 00:14:15,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18923 to 10719. [2021-06-06 00:14:15,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10719 states, 10718 states have (on average 3.8041612241089755) internal successors, (40773), 10718 states have internal predecessors, (40773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:15,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10719 states to 10719 states and 40773 transitions. [2021-06-06 00:14:15,641 INFO L78 Accepts]: Start accepts. Automaton has 10719 states and 40773 transitions. Word has length 28 [2021-06-06 00:14:15,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:15,641 INFO L482 AbstractCegarLoop]: Abstraction has 10719 states and 40773 transitions. [2021-06-06 00:14:15,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:14:15,641 INFO L276 IsEmpty]: Start isEmpty. Operand 10719 states and 40773 transitions. [2021-06-06 00:14:15,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:15,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:15,656 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:15,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3948,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:15,856 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:15,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:15,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893249, now seen corresponding path program 97 times [2021-06-06 00:14:15,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:15,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135067658] [2021-06-06 00:14:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:15,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:15,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135067658] [2021-06-06 00:14:15,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135067658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:15,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958354474] [2021-06-06 00:14:15,892 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 [2021-06-06 00:14:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:15,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:15,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:16,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958354474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:16,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:16,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:14:16,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64776682] [2021-06-06 00:14:16,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:16,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:16,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:16,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:16,017 INFO L87 Difference]: Start difference. First operand 10719 states and 40773 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:17,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:17,158 INFO L93 Difference]: Finished difference Result 19527 states and 70320 transitions. [2021-06-06 00:14:17,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-06 00:14:17,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:17,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:17,197 INFO L225 Difference]: With dead ends: 19527 [2021-06-06 00:14:17,197 INFO L226 Difference]: Without dead ends: 19527 [2021-06-06 00:14:17,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 738.6ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-06 00:14:17,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19527 states. [2021-06-06 00:14:17,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19527 to 10827. [2021-06-06 00:14:17,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10827 states, 10826 states have (on average 3.797062627009052) internal successors, (41107), 10826 states have internal predecessors, (41107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:17,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10827 states to 10827 states and 41107 transitions. [2021-06-06 00:14:17,471 INFO L78 Accepts]: Start accepts. Automaton has 10827 states and 41107 transitions. Word has length 28 [2021-06-06 00:14:17,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:17,471 INFO L482 AbstractCegarLoop]: Abstraction has 10827 states and 41107 transitions. [2021-06-06 00:14:17,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:17,471 INFO L276 IsEmpty]: Start isEmpty. Operand 10827 states and 41107 transitions. [2021-06-06 00:14:17,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:17,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:17,487 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:17,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3949 [2021-06-06 00:14:17,687 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:17,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:17,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1476034893, now seen corresponding path program 98 times [2021-06-06 00:14:17,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:17,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099966627] [2021-06-06 00:14:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:17,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:17,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099966627] [2021-06-06 00:14:17,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099966627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:17,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730280609] [2021-06-06 00:14:17,722 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 [2021-06-06 00:14:17,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:14:17,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:17,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:17,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:17,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730280609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:17,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:17,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:14:17,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100036106] [2021-06-06 00:14:17,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:17,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:17,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:17,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:17,848 INFO L87 Difference]: Start difference. First operand 10827 states and 41107 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:18,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:18,782 INFO L93 Difference]: Finished difference Result 19102 states and 69164 transitions. [2021-06-06 00:14:18,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:14:18,782 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:18,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:18,819 INFO L225 Difference]: With dead ends: 19102 [2021-06-06 00:14:18,819 INFO L226 Difference]: Without dead ends: 19098 [2021-06-06 00:14:18,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 579.7ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:14:18,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19098 states. [2021-06-06 00:14:19,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19098 to 10753. [2021-06-06 00:14:19,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10753 states, 10752 states have (on average 3.800967261904762) internal successors, (40868), 10752 states have internal predecessors, (40868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10753 states to 10753 states and 40868 transitions. [2021-06-06 00:14:19,079 INFO L78 Accepts]: Start accepts. Automaton has 10753 states and 40868 transitions. Word has length 28 [2021-06-06 00:14:19,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:19,079 INFO L482 AbstractCegarLoop]: Abstraction has 10753 states and 40868 transitions. [2021-06-06 00:14:19,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 10753 states and 40868 transitions. [2021-06-06 00:14:19,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:19,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:19,094 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:19,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3950,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:19,295 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:19,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:19,295 INFO L82 PathProgramCache]: Analyzing trace with hash 729404223, now seen corresponding path program 99 times [2021-06-06 00:14:19,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:19,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156126713] [2021-06-06 00:14:19,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:19,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:19,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156126713] [2021-06-06 00:14:19,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156126713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:19,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59521794] [2021-06-06 00:14:19,336 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 [2021-06-06 00:14:19,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:14:19,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:19,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:19,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:19,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59521794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:19,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:19,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:14:19,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834237771] [2021-06-06 00:14:19,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:19,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:19,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:19,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:19,456 INFO L87 Difference]: Start difference. First operand 10753 states and 40868 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:14:20,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:20,650 INFO L93 Difference]: Finished difference Result 18533 states and 66656 transitions. [2021-06-06 00:14:20,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:14:20,650 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-06 00:14:20,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:20,690 INFO L225 Difference]: With dead ends: 18533 [2021-06-06 00:14:20,690 INFO L226 Difference]: Without dead ends: 18533 [2021-06-06 00:14:20,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 709.2ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-06 00:14:20,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18533 states. [2021-06-06 00:14:20,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18533 to 10980. [2021-06-06 00:14:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10979 states have (on average 3.8041716003278987) internal successors, (41766), 10979 states have internal predecessors, (41766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:20,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 41766 transitions. [2021-06-06 00:14:20,964 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 41766 transitions. Word has length 28 [2021-06-06 00:14:20,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:20,965 INFO L482 AbstractCegarLoop]: Abstraction has 10980 states and 41766 transitions. [2021-06-06 00:14:20,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:14:20,965 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 41766 transitions. [2021-06-06 00:14:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:20,979 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:20,979 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:21,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3951 [2021-06-06 00:14:21,180 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:21,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:21,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1909723903, now seen corresponding path program 100 times [2021-06-06 00:14:21,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:21,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204599613] [2021-06-06 00:14:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:21,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:21,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204599613] [2021-06-06 00:14:21,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204599613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:21,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272278517] [2021-06-06 00:14:21,221 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 [2021-06-06 00:14:21,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:14:21,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:21,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:21,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:21,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272278517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:21,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:21,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:14:21,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949311543] [2021-06-06 00:14:21,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:21,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:21,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:21,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:21,332 INFO L87 Difference]: Start difference. First operand 10980 states and 41766 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:14:22,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:22,301 INFO L93 Difference]: Finished difference Result 18246 states and 65858 transitions. [2021-06-06 00:14:22,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:14:22,301 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-06 00:14:22,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:22,338 INFO L225 Difference]: With dead ends: 18246 [2021-06-06 00:14:22,338 INFO L226 Difference]: Without dead ends: 18234 [2021-06-06 00:14:22,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 573.8ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:14:22,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18234 states. [2021-06-06 00:14:22,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18234 to 11082. [2021-06-06 00:14:22,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11082 states, 11081 states have (on average 3.798303402220016) internal successors, (42089), 11081 states have internal predecessors, (42089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11082 states to 11082 states and 42089 transitions. [2021-06-06 00:14:22,610 INFO L78 Accepts]: Start accepts. Automaton has 11082 states and 42089 transitions. Word has length 28 [2021-06-06 00:14:22,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:22,611 INFO L482 AbstractCegarLoop]: Abstraction has 11082 states and 42089 transitions. [2021-06-06 00:14:22,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:14:22,611 INFO L276 IsEmpty]: Start isEmpty. Operand 11082 states and 42089 transitions. [2021-06-06 00:14:22,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:22,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:22,627 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:22,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3952,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:22,827 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:22,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:22,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1714650925, now seen corresponding path program 72 times [2021-06-06 00:14:22,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:22,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610332634] [2021-06-06 00:14:22,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:22,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:22,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610332634] [2021-06-06 00:14:22,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610332634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:22,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000024604] [2021-06-06 00:14:22,868 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 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 [2021-06-06 00:14:22,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:14:22,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:22,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:22,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:23,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000024604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:23,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:23,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-06 00:14:23,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030930497] [2021-06-06 00:14:23,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:14:23,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:23,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:14:23,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:14:23,033 INFO L87 Difference]: Start difference. First operand 11082 states and 42089 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-06 00:14:23,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:23,501 INFO L93 Difference]: Finished difference Result 15733 states and 58180 transitions. [2021-06-06 00:14:23,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:14:23,502 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-06 00:14:23,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:23,535 INFO L225 Difference]: With dead ends: 15733 [2021-06-06 00:14:23,535 INFO L226 Difference]: Without dead ends: 15733 [2021-06-06 00:14:23,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:14:23,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15733 states. [2021-06-06 00:14:23,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15733 to 11154. [2021-06-06 00:14:23,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11154 states, 11153 states have (on average 3.7938671209540034) internal successors, (42313), 11153 states have internal predecessors, (42313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:23,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11154 states to 11154 states and 42313 transitions. [2021-06-06 00:14:23,762 INFO L78 Accepts]: Start accepts. Automaton has 11154 states and 42313 transitions. Word has length 28 [2021-06-06 00:14:23,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:23,762 INFO L482 AbstractCegarLoop]: Abstraction has 11154 states and 42313 transitions. [2021-06-06 00:14:23,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-06 00:14:23,762 INFO L276 IsEmpty]: Start isEmpty. Operand 11154 states and 42313 transitions. [2021-06-06 00:14:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:23,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:23,779 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:23,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3953,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:23,980 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:23,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:23,980 INFO L82 PathProgramCache]: Analyzing trace with hash -55855667, now seen corresponding path program 73 times [2021-06-06 00:14:23,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:23,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653892426] [2021-06-06 00:14:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:24,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:24,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653892426] [2021-06-06 00:14:24,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653892426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:24,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244589319] [2021-06-06 00:14:24,015 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 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 [2021-06-06 00:14:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:24,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:24,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:24,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244589319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:24,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:24,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:14:24,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890204430] [2021-06-06 00:14:24,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:14:24,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:24,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:14:24,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:14:24,104 INFO L87 Difference]: Start difference. First operand 11154 states and 42313 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:14:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:24,636 INFO L93 Difference]: Finished difference Result 16710 states and 61024 transitions. [2021-06-06 00:14:24,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:14:24,636 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-06 00:14:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:24,670 INFO L225 Difference]: With dead ends: 16710 [2021-06-06 00:14:24,671 INFO L226 Difference]: Without dead ends: 16710 [2021-06-06 00:14:24,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 302.6ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:14:24,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16710 states. [2021-06-06 00:14:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16710 to 11484. [2021-06-06 00:14:24,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11484 states, 11483 states have (on average 3.7768875729339024) internal successors, (43370), 11483 states have internal predecessors, (43370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 43370 transitions. [2021-06-06 00:14:24,931 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 43370 transitions. Word has length 28 [2021-06-06 00:14:24,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:24,931 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 43370 transitions. [2021-06-06 00:14:24,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:14:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 43370 transitions. [2021-06-06 00:14:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:24,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:24,949 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:25,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3954,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:25,150 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:25,150 INFO L82 PathProgramCache]: Analyzing trace with hash -100676809, now seen corresponding path program 74 times [2021-06-06 00:14:25,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:25,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202132690] [2021-06-06 00:14:25,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:25,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:25,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202132690] [2021-06-06 00:14:25,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202132690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:25,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216541523] [2021-06-06 00:14:25,185 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 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 [2021-06-06 00:14:25,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:14:25,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:25,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:25,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:25,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216541523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:25,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:25,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:14:25,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592790004] [2021-06-06 00:14:25,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:14:25,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:25,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:14:25,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:14:25,266 INFO L87 Difference]: Start difference. First operand 11484 states and 43370 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:14:25,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:25,705 INFO L93 Difference]: Finished difference Result 16200 states and 59687 transitions. [2021-06-06 00:14:25,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:14:25,706 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-06 00:14:25,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:25,739 INFO L225 Difference]: With dead ends: 16200 [2021-06-06 00:14:25,739 INFO L226 Difference]: Without dead ends: 16192 [2021-06-06 00:14:25,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:14:25,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16192 states. [2021-06-06 00:14:26,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16192 to 11424. [2021-06-06 00:14:26,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11424 states, 11423 states have (on average 3.7788671977589074) internal successors, (43166), 11423 states have internal predecessors, (43166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11424 states to 11424 states and 43166 transitions. [2021-06-06 00:14:26,044 INFO L78 Accepts]: Start accepts. Automaton has 11424 states and 43166 transitions. Word has length 28 [2021-06-06 00:14:26,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:26,044 INFO L482 AbstractCegarLoop]: Abstraction has 11424 states and 43166 transitions. [2021-06-06 00:14:26,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:14:26,044 INFO L276 IsEmpty]: Start isEmpty. Operand 11424 states and 43166 transitions. [2021-06-06 00:14:26,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:26,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:26,061 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:26,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3955 [2021-06-06 00:14:26,262 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:26,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:26,262 INFO L82 PathProgramCache]: Analyzing trace with hash 496659849, now seen corresponding path program 75 times [2021-06-06 00:14:26,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:26,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357389452] [2021-06-06 00:14:26,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:26,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:26,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357389452] [2021-06-06 00:14:26,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357389452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:26,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989763138] [2021-06-06 00:14:26,303 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 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 [2021-06-06 00:14:26,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:14:26,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:26,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:26,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:26,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989763138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:26,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:26,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-06 00:14:26,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077897068] [2021-06-06 00:14:26,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:14:26,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:26,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:14:26,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:14:26,385 INFO L87 Difference]: Start difference. First operand 11424 states and 43166 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-06 00:14:26,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:26,842 INFO L93 Difference]: Finished difference Result 16100 states and 59399 transitions. [2021-06-06 00:14:26,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:14:26,843 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-06 00:14:26,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:26,873 INFO L225 Difference]: With dead ends: 16100 [2021-06-06 00:14:26,873 INFO L226 Difference]: Without dead ends: 16088 [2021-06-06 00:14:26,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:14:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16088 states. [2021-06-06 00:14:27,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16088 to 11406. [2021-06-06 00:14:27,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11406 states, 11405 states have (on average 3.779307321350285) internal successors, (43103), 11405 states have internal predecessors, (43103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:27,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11406 states to 11406 states and 43103 transitions. [2021-06-06 00:14:27,106 INFO L78 Accepts]: Start accepts. Automaton has 11406 states and 43103 transitions. Word has length 28 [2021-06-06 00:14:27,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:27,106 INFO L482 AbstractCegarLoop]: Abstraction has 11406 states and 43103 transitions. [2021-06-06 00:14:27,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-06 00:14:27,106 INFO L276 IsEmpty]: Start isEmpty. Operand 11406 states and 43103 transitions. [2021-06-06 00:14:27,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:27,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:27,123 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:27,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3956 [2021-06-06 00:14:27,323 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:27,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:27,323 INFO L82 PathProgramCache]: Analyzing trace with hash -158749623, now seen corresponding path program 76 times [2021-06-06 00:14:27,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:27,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637116950] [2021-06-06 00:14:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:27,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:27,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637116950] [2021-06-06 00:14:27,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637116950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:27,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300466089] [2021-06-06 00:14:27,359 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 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 [2021-06-06 00:14:27,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:14:27,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:27,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:27,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:27,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300466089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:27,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:27,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:14:27,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4971341] [2021-06-06 00:14:27,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:14:27,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:27,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:14:27,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:14:27,477 INFO L87 Difference]: Start difference. First operand 11406 states and 43103 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:28,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:28,424 INFO L93 Difference]: Finished difference Result 21916 states and 78065 transitions. [2021-06-06 00:14:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:14:28,424 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:28,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:28,467 INFO L225 Difference]: With dead ends: 21916 [2021-06-06 00:14:28,467 INFO L226 Difference]: Without dead ends: 21916 [2021-06-06 00:14:28,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 519.6ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:14:28,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21916 states. [2021-06-06 00:14:28,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21916 to 11388. [2021-06-06 00:14:28,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11388 states, 11387 states have (on average 3.7779924475278825) internal successors, (43020), 11387 states have internal predecessors, (43020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:28,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11388 states to 11388 states and 43020 transitions. [2021-06-06 00:14:28,741 INFO L78 Accepts]: Start accepts. Automaton has 11388 states and 43020 transitions. Word has length 28 [2021-06-06 00:14:28,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:28,741 INFO L482 AbstractCegarLoop]: Abstraction has 11388 states and 43020 transitions. [2021-06-06 00:14:28,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:28,741 INFO L276 IsEmpty]: Start isEmpty. Operand 11388 states and 43020 transitions. [2021-06-06 00:14:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:28,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:28,758 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:28,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3957 [2021-06-06 00:14:28,958 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:28,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:28,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1660375731, now seen corresponding path program 101 times [2021-06-06 00:14:28,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:28,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123191981] [2021-06-06 00:14:28,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:28,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:28,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123191981] [2021-06-06 00:14:28,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123191981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:28,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722470012] [2021-06-06 00:14:28,985 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 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 [2021-06-06 00:14:29,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:14:29,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:29,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:29,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:29,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722470012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:29,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:29,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:14:29,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871455275] [2021-06-06 00:14:29,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:14:29,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:29,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:14:29,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:14:29,169 INFO L87 Difference]: Start difference. First operand 11388 states and 43020 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:29,885 INFO L93 Difference]: Finished difference Result 17700 states and 63852 transitions. [2021-06-06 00:14:29,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:14:29,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:29,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:29,923 INFO L225 Difference]: With dead ends: 17700 [2021-06-06 00:14:29,923 INFO L226 Difference]: Without dead ends: 17684 [2021-06-06 00:14:29,923 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 372.7ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:14:29,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17684 states. [2021-06-06 00:14:30,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17684 to 12696. [2021-06-06 00:14:30,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12696 states, 12695 states have (on average 3.8450571090980703) internal successors, (48813), 12695 states have internal predecessors, (48813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12696 states to 12696 states and 48813 transitions. [2021-06-06 00:14:30,255 INFO L78 Accepts]: Start accepts. Automaton has 12696 states and 48813 transitions. Word has length 28 [2021-06-06 00:14:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:30,255 INFO L482 AbstractCegarLoop]: Abstraction has 12696 states and 48813 transitions. [2021-06-06 00:14:30,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:30,255 INFO L276 IsEmpty]: Start isEmpty. Operand 12696 states and 48813 transitions. [2021-06-06 00:14:30,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:30,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:30,275 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:30,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3958 [2021-06-06 00:14:30,475 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:30,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:30,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1748793285, now seen corresponding path program 102 times [2021-06-06 00:14:30,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:30,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217093331] [2021-06-06 00:14:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:30,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:30,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217093331] [2021-06-06 00:14:30,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217093331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:30,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532523144] [2021-06-06 00:14:30,504 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 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 [2021-06-06 00:14:30,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:14:30,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:30,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:30,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:30,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532523144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:30,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:30,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:14:30,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846518128] [2021-06-06 00:14:30,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:14:30,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:30,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:14:30,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:14:30,611 INFO L87 Difference]: Start difference. First operand 12696 states and 48813 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:31,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:31,341 INFO L93 Difference]: Finished difference Result 17792 states and 64097 transitions. [2021-06-06 00:14:31,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:14:31,341 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:31,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:31,375 INFO L225 Difference]: With dead ends: 17792 [2021-06-06 00:14:31,375 INFO L226 Difference]: Without dead ends: 17786 [2021-06-06 00:14:31,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 415.9ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:14:31,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17786 states. [2021-06-06 00:14:31,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17786 to 12666. [2021-06-06 00:14:31,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12666 states, 12665 states have (on average 3.844295302013423) internal successors, (48688), 12665 states have internal predecessors, (48688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:31,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12666 states to 12666 states and 48688 transitions. [2021-06-06 00:14:31,676 INFO L78 Accepts]: Start accepts. Automaton has 12666 states and 48688 transitions. Word has length 28 [2021-06-06 00:14:31,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:31,676 INFO L482 AbstractCegarLoop]: Abstraction has 12666 states and 48688 transitions. [2021-06-06 00:14:31,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:31,676 INFO L276 IsEmpty]: Start isEmpty. Operand 12666 states and 48688 transitions. [2021-06-06 00:14:31,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:31,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:31,697 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:31,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3959 [2021-06-06 00:14:31,897 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:31,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:31,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1491665525, now seen corresponding path program 103 times [2021-06-06 00:14:31,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:31,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788455608] [2021-06-06 00:14:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:31,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:31,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788455608] [2021-06-06 00:14:31,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788455608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:31,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802218371] [2021-06-06 00:14:31,924 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 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 [2021-06-06 00:14:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:31,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:31,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:32,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802218371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:32,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:32,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:14:32,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452952087] [2021-06-06 00:14:32,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:14:32,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:32,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:14:32,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:14:32,021 INFO L87 Difference]: Start difference. First operand 12666 states and 48688 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:32,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:32,694 INFO L93 Difference]: Finished difference Result 19854 states and 71614 transitions. [2021-06-06 00:14:32,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:14:32,694 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:32,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:32,731 INFO L225 Difference]: With dead ends: 19854 [2021-06-06 00:14:32,731 INFO L226 Difference]: Without dead ends: 19838 [2021-06-06 00:14:32,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 366.1ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:14:32,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19838 states. [2021-06-06 00:14:32,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19838 to 12721. [2021-06-06 00:14:32,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12721 states, 12720 states have (on average 3.8488207547169813) internal successors, (48957), 12720 states have internal predecessors, (48957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12721 states to 12721 states and 48957 transitions. [2021-06-06 00:14:33,019 INFO L78 Accepts]: Start accepts. Automaton has 12721 states and 48957 transitions. Word has length 28 [2021-06-06 00:14:33,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:33,020 INFO L482 AbstractCegarLoop]: Abstraction has 12721 states and 48957 transitions. [2021-06-06 00:14:33,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:33,020 INFO L276 IsEmpty]: Start isEmpty. Operand 12721 states and 48957 transitions. [2021-06-06 00:14:33,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:33,039 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:33,039 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:33,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3960,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:33,239 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:33,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1457648085, now seen corresponding path program 104 times [2021-06-06 00:14:33,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:33,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556068833] [2021-06-06 00:14:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:33,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:33,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556068833] [2021-06-06 00:14:33,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556068833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:33,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680764265] [2021-06-06 00:14:33,268 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 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 [2021-06-06 00:14:33,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:14:33,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:33,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:33,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:33,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680764265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:33,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:33,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:14:33,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906270925] [2021-06-06 00:14:33,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:14:33,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:33,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:14:33,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:14:33,380 INFO L87 Difference]: Start difference. First operand 12721 states and 48957 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:34,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:34,076 INFO L93 Difference]: Finished difference Result 20992 states and 75172 transitions. [2021-06-06 00:14:34,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:14:34,077 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:34,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:34,116 INFO L225 Difference]: With dead ends: 20992 [2021-06-06 00:14:34,116 INFO L226 Difference]: Without dead ends: 20992 [2021-06-06 00:14:34,117 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 413.4ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:14:34,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20992 states. [2021-06-06 00:14:34,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20992 to 12737. [2021-06-06 00:14:34,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12737 states, 12736 states have (on average 3.845791457286432) internal successors, (48980), 12736 states have internal predecessors, (48980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12737 states to 12737 states and 48980 transitions. [2021-06-06 00:14:34,450 INFO L78 Accepts]: Start accepts. Automaton has 12737 states and 48980 transitions. Word has length 28 [2021-06-06 00:14:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:34,450 INFO L482 AbstractCegarLoop]: Abstraction has 12737 states and 48980 transitions. [2021-06-06 00:14:34,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:34,450 INFO L276 IsEmpty]: Start isEmpty. Operand 12737 states and 48980 transitions. [2021-06-06 00:14:34,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:34,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:34,473 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:34,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3961,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:34,674 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:34,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:34,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1381492369, now seen corresponding path program 77 times [2021-06-06 00:14:34,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:34,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985733888] [2021-06-06 00:14:34,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:34,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:34,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985733888] [2021-06-06 00:14:34,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985733888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:34,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377620613] [2021-06-06 00:14:34,708 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 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 [2021-06-06 00:14:34,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:14:34,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:34,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:34,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:34,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377620613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:34,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:34,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:14:34,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617433577] [2021-06-06 00:14:34,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:14:34,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:34,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:14:34,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:14:34,834 INFO L87 Difference]: Start difference. First operand 12737 states and 48980 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:35,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:35,788 INFO L93 Difference]: Finished difference Result 22133 states and 81225 transitions. [2021-06-06 00:14:35,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-06 00:14:35,789 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:35,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:35,833 INFO L225 Difference]: With dead ends: 22133 [2021-06-06 00:14:35,833 INFO L226 Difference]: Without dead ends: 22129 [2021-06-06 00:14:35,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 530.4ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:14:35,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22129 states. [2021-06-06 00:14:36,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22129 to 12991. [2021-06-06 00:14:36,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12991 states, 12990 states have (on average 3.8354888375673597) internal successors, (49823), 12990 states have internal predecessors, (49823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:36,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12991 states to 12991 states and 49823 transitions. [2021-06-06 00:14:36,170 INFO L78 Accepts]: Start accepts. Automaton has 12991 states and 49823 transitions. Word has length 28 [2021-06-06 00:14:36,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:36,170 INFO L482 AbstractCegarLoop]: Abstraction has 12991 states and 49823 transitions. [2021-06-06 00:14:36,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:36,170 INFO L276 IsEmpty]: Start isEmpty. Operand 12991 states and 49823 transitions. [2021-06-06 00:14:36,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:36,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:36,190 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:36,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3962,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:36,391 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:36,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:36,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1750460849, now seen corresponding path program 105 times [2021-06-06 00:14:36,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:36,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608509626] [2021-06-06 00:14:36,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:36,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:36,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608509626] [2021-06-06 00:14:36,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608509626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:36,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952948841] [2021-06-06 00:14:36,422 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 [2021-06-06 00:14:36,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:14:36,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:36,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:36,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:36,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:36,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952948841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:36,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:36,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:14:36,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511699956] [2021-06-06 00:14:36,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:14:36,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:36,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:14:36,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:14:36,513 INFO L87 Difference]: Start difference. First operand 12991 states and 49823 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:37,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:37,156 INFO L93 Difference]: Finished difference Result 18794 states and 68812 transitions. [2021-06-06 00:14:37,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:14:37,156 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:37,193 INFO L225 Difference]: With dead ends: 18794 [2021-06-06 00:14:37,193 INFO L226 Difference]: Without dead ends: 18768 [2021-06-06 00:14:37,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 337.1ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:14:37,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18768 states. [2021-06-06 00:14:37,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18768 to 13271. [2021-06-06 00:14:37,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13271 states, 13270 states have (on average 3.853654860587792) internal successors, (51138), 13270 states have internal predecessors, (51138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:37,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13271 states to 13271 states and 51138 transitions. [2021-06-06 00:14:37,488 INFO L78 Accepts]: Start accepts. Automaton has 13271 states and 51138 transitions. Word has length 28 [2021-06-06 00:14:37,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:37,488 INFO L482 AbstractCegarLoop]: Abstraction has 13271 states and 51138 transitions. [2021-06-06 00:14:37,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:37,488 INFO L276 IsEmpty]: Start isEmpty. Operand 13271 states and 51138 transitions. [2021-06-06 00:14:37,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:37,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:37,508 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:37,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3963 [2021-06-06 00:14:37,708 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:37,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1198852761, now seen corresponding path program 106 times [2021-06-06 00:14:37,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:37,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474453211] [2021-06-06 00:14:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:37,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:37,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474453211] [2021-06-06 00:14:37,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474453211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:37,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492863749] [2021-06-06 00:14:37,740 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 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 [2021-06-06 00:14:37,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:14:37,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:37,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:37,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:37,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492863749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:37,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:37,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:14:37,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053647330] [2021-06-06 00:14:37,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:14:37,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:37,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:14:37,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:14:37,836 INFO L87 Difference]: Start difference. First operand 13271 states and 51138 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:38,627 INFO L93 Difference]: Finished difference Result 18772 states and 67861 transitions. [2021-06-06 00:14:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:14:38,628 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:38,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:38,664 INFO L225 Difference]: With dead ends: 18772 [2021-06-06 00:14:38,664 INFO L226 Difference]: Without dead ends: 18772 [2021-06-06 00:14:38,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 463.5ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:14:38,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18772 states. [2021-06-06 00:14:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18772 to 13226. [2021-06-06 00:14:38,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13226 states, 13225 states have (on average 3.8455198487712665) internal successors, (50857), 13225 states have internal predecessors, (50857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:38,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13226 states to 13226 states and 50857 transitions. [2021-06-06 00:14:38,962 INFO L78 Accepts]: Start accepts. Automaton has 13226 states and 50857 transitions. Word has length 28 [2021-06-06 00:14:38,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:38,962 INFO L482 AbstractCegarLoop]: Abstraction has 13226 states and 50857 transitions. [2021-06-06 00:14:38,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:38,962 INFO L276 IsEmpty]: Start isEmpty. Operand 13226 states and 50857 transitions. [2021-06-06 00:14:38,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:38,982 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:38,982 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:39,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3964,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:39,182 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:39,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:39,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1518971225, now seen corresponding path program 107 times [2021-06-06 00:14:39,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:39,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015746934] [2021-06-06 00:14:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:39,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:39,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015746934] [2021-06-06 00:14:39,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015746934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:39,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152479209] [2021-06-06 00:14:39,214 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 [2021-06-06 00:14:39,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:14:39,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:39,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:39,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:39,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152479209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:39,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:39,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:14:39,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30528589] [2021-06-06 00:14:39,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:14:39,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:39,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:14:39,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:14:39,310 INFO L87 Difference]: Start difference. First operand 13226 states and 50857 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:39,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:39,972 INFO L93 Difference]: Finished difference Result 20120 states and 73134 transitions. [2021-06-06 00:14:39,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:14:39,972 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:39,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:40,012 INFO L225 Difference]: With dead ends: 20120 [2021-06-06 00:14:40,012 INFO L226 Difference]: Without dead ends: 20120 [2021-06-06 00:14:40,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 363.1ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:14:40,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20120 states. [2021-06-06 00:14:40,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20120 to 13939. [2021-06-06 00:14:40,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13939 states, 13938 states have (on average 3.8318266609269624) internal successors, (53408), 13938 states have internal predecessors, (53408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:40,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13939 states to 13939 states and 53408 transitions. [2021-06-06 00:14:40,311 INFO L78 Accepts]: Start accepts. Automaton has 13939 states and 53408 transitions. Word has length 28 [2021-06-06 00:14:40,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:40,311 INFO L482 AbstractCegarLoop]: Abstraction has 13939 states and 53408 transitions. [2021-06-06 00:14:40,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:40,311 INFO L276 IsEmpty]: Start isEmpty. Operand 13939 states and 53408 transitions. [2021-06-06 00:14:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:40,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:40,332 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:40,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3965 [2021-06-06 00:14:40,532 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:40,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:40,532 INFO L82 PathProgramCache]: Analyzing trace with hash -629568261, now seen corresponding path program 108 times [2021-06-06 00:14:40,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:40,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124815672] [2021-06-06 00:14:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:40,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:40,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124815672] [2021-06-06 00:14:40,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124815672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:40,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900167835] [2021-06-06 00:14:40,564 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 [2021-06-06 00:14:40,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:14:40,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:40,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:40,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:40,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900167835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:40,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:40,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:14:40,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786697044] [2021-06-06 00:14:40,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:14:40,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:40,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:14:40,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:14:40,663 INFO L87 Difference]: Start difference. First operand 13939 states and 53408 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:41,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:41,568 INFO L93 Difference]: Finished difference Result 22535 states and 80778 transitions. [2021-06-06 00:14:41,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:14:41,569 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:41,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:41,611 INFO L225 Difference]: With dead ends: 22535 [2021-06-06 00:14:41,611 INFO L226 Difference]: Without dead ends: 22535 [2021-06-06 00:14:41,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 470.3ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:14:41,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22535 states. [2021-06-06 00:14:41,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22535 to 14169. [2021-06-06 00:14:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14169 states, 14168 states have (on average 3.8435206098249575) internal successors, (54455), 14168 states have internal predecessors, (54455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14169 states to 14169 states and 54455 transitions. [2021-06-06 00:14:41,921 INFO L78 Accepts]: Start accepts. Automaton has 14169 states and 54455 transitions. Word has length 28 [2021-06-06 00:14:41,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:41,921 INFO L482 AbstractCegarLoop]: Abstraction has 14169 states and 54455 transitions. [2021-06-06 00:14:41,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:41,921 INFO L276 IsEmpty]: Start isEmpty. Operand 14169 states and 54455 transitions. [2021-06-06 00:14:41,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:41,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:41,942 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:42,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3966,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:42,142 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:42,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:42,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1952101299, now seen corresponding path program 78 times [2021-06-06 00:14:42,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:42,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425972361] [2021-06-06 00:14:42,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:42,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:42,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425972361] [2021-06-06 00:14:42,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425972361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:42,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198006006] [2021-06-06 00:14:42,177 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 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 [2021-06-06 00:14:42,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:14:42,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:42,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:42,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:42,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198006006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:42,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:42,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:14:42,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361141062] [2021-06-06 00:14:42,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:42,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:42,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:42,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:42,302 INFO L87 Difference]: Start difference. First operand 14169 states and 54455 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:43,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:43,801 INFO L93 Difference]: Finished difference Result 39203 states and 140890 transitions. [2021-06-06 00:14:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-06 00:14:43,801 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:43,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:43,891 INFO L225 Difference]: With dead ends: 39203 [2021-06-06 00:14:43,891 INFO L226 Difference]: Without dead ends: 39203 [2021-06-06 00:14:43,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 894.7ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-06 00:14:43,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39203 states. [2021-06-06 00:14:44,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39203 to 15405. [2021-06-06 00:14:44,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15405 states, 15404 states have (on average 3.890028564009348) internal successors, (59922), 15404 states have internal predecessors, (59922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15405 states to 15405 states and 59922 transitions. [2021-06-06 00:14:44,598 INFO L78 Accepts]: Start accepts. Automaton has 15405 states and 59922 transitions. Word has length 28 [2021-06-06 00:14:44,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:44,598 INFO L482 AbstractCegarLoop]: Abstraction has 15405 states and 59922 transitions. [2021-06-06 00:14:44,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 15405 states and 59922 transitions. [2021-06-06 00:14:44,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:44,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:44,625 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:44,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3967,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:44,826 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:44,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:44,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1385149219, now seen corresponding path program 79 times [2021-06-06 00:14:44,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:44,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570942216] [2021-06-06 00:14:44,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:44,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:44,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570942216] [2021-06-06 00:14:44,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570942216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:44,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321549440] [2021-06-06 00:14:44,863 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 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 [2021-06-06 00:14:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:44,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:44,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:44,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321549440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:44,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:44,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:14:44,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133019130] [2021-06-06 00:14:44,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:44,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:44,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:44,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:44,997 INFO L87 Difference]: Start difference. First operand 15405 states and 59922 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:46,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:46,521 INFO L93 Difference]: Finished difference Result 38231 states and 138333 transitions. [2021-06-06 00:14:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-06 00:14:46,521 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:46,608 INFO L225 Difference]: With dead ends: 38231 [2021-06-06 00:14:46,608 INFO L226 Difference]: Without dead ends: 38231 [2021-06-06 00:14:46,609 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 936.6ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-06 00:14:46,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38231 states. [2021-06-06 00:14:47,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38231 to 15379. [2021-06-06 00:14:47,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15379 states, 15378 states have (on average 3.886461178306672) internal successors, (59766), 15378 states have internal predecessors, (59766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15379 states to 15379 states and 59766 transitions. [2021-06-06 00:14:47,141 INFO L78 Accepts]: Start accepts. Automaton has 15379 states and 59766 transitions. Word has length 28 [2021-06-06 00:14:47,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:47,142 INFO L482 AbstractCegarLoop]: Abstraction has 15379 states and 59766 transitions. [2021-06-06 00:14:47,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:47,142 INFO L276 IsEmpty]: Start isEmpty. Operand 15379 states and 59766 transitions. [2021-06-06 00:14:47,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:47,164 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:47,165 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:47,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3968 [2021-06-06 00:14:47,365 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:47,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:47,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1667375567, now seen corresponding path program 109 times [2021-06-06 00:14:47,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:47,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317335799] [2021-06-06 00:14:47,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:47,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:47,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317335799] [2021-06-06 00:14:47,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317335799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:47,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539754513] [2021-06-06 00:14:47,399 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 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 [2021-06-06 00:14:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:47,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:47,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:47,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539754513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:47,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:47,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:14:47,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591111445] [2021-06-06 00:14:47,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:14:47,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:47,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:14:47,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:14:47,476 INFO L87 Difference]: Start difference. First operand 15379 states and 59766 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-06 00:14:47,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:47,735 INFO L93 Difference]: Finished difference Result 23740 states and 90889 transitions. [2021-06-06 00:14:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:14:47,735 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-06-06 00:14:47,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:47,785 INFO L225 Difference]: With dead ends: 23740 [2021-06-06 00:14:47,785 INFO L226 Difference]: Without dead ends: 23693 [2021-06-06 00:14:47,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:14:47,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23693 states. [2021-06-06 00:14:48,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23693 to 20498. [2021-06-06 00:14:48,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20498 states, 20497 states have (on average 3.9016441430453237) internal successors, (79972), 20497 states have internal predecessors, (79972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:48,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20498 states to 20498 states and 79972 transitions. [2021-06-06 00:14:48,254 INFO L78 Accepts]: Start accepts. Automaton has 20498 states and 79972 transitions. Word has length 28 [2021-06-06 00:14:48,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:48,254 INFO L482 AbstractCegarLoop]: Abstraction has 20498 states and 79972 transitions. [2021-06-06 00:14:48,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-06 00:14:48,254 INFO L276 IsEmpty]: Start isEmpty. Operand 20498 states and 79972 transitions. [2021-06-06 00:14:48,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:48,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:48,284 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:48,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3969,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:48,489 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:48,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:48,489 INFO L82 PathProgramCache]: Analyzing trace with hash 242691175, now seen corresponding path program 110 times [2021-06-06 00:14:48,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:48,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887169396] [2021-06-06 00:14:48,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:48,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:48,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887169396] [2021-06-06 00:14:48,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887169396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:48,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739015535] [2021-06-06 00:14:48,520 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 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 [2021-06-06 00:14:48,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:14:48,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:48,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:14:48,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:48,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739015535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:48,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:48,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:14:48,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791667461] [2021-06-06 00:14:48,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:14:48,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:48,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:14:48,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:14:48,603 INFO L87 Difference]: Start difference. First operand 20498 states and 79972 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-06 00:14:48,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:48,842 INFO L93 Difference]: Finished difference Result 23252 states and 88342 transitions. [2021-06-06 00:14:48,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:14:48,842 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-06-06 00:14:48,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:48,892 INFO L225 Difference]: With dead ends: 23252 [2021-06-06 00:14:48,892 INFO L226 Difference]: Without dead ends: 23252 [2021-06-06 00:14:48,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:14:48,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23252 states. [2021-06-06 00:14:49,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23252 to 20001. [2021-06-06 00:14:49,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20001 states, 20000 states have (on average 3.89) internal successors, (77800), 20000 states have internal predecessors, (77800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20001 states to 20001 states and 77800 transitions. [2021-06-06 00:14:49,281 INFO L78 Accepts]: Start accepts. Automaton has 20001 states and 77800 transitions. Word has length 28 [2021-06-06 00:14:49,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:49,281 INFO L482 AbstractCegarLoop]: Abstraction has 20001 states and 77800 transitions. [2021-06-06 00:14:49,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-06 00:14:49,281 INFO L276 IsEmpty]: Start isEmpty. Operand 20001 states and 77800 transitions. [2021-06-06 00:14:49,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:49,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:49,312 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:49,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3970,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:49,517 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:49,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:49,517 INFO L82 PathProgramCache]: Analyzing trace with hash -708990263, now seen corresponding path program 111 times [2021-06-06 00:14:49,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:49,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872417428] [2021-06-06 00:14:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:49,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:49,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872417428] [2021-06-06 00:14:49,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872417428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:49,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317180796] [2021-06-06 00:14:49,557 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 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 [2021-06-06 00:14:49,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:14:49,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:49,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:49,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:49,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317180796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:49,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:49,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-06 00:14:49,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563105258] [2021-06-06 00:14:49,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:14:49,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:49,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:14:49,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:14:49,665 INFO L87 Difference]: Start difference. First operand 20001 states and 77800 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:50,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:50,587 INFO L93 Difference]: Finished difference Result 31840 states and 117907 transitions. [2021-06-06 00:14:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:14:50,588 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:50,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:50,662 INFO L225 Difference]: With dead ends: 31840 [2021-06-06 00:14:50,662 INFO L226 Difference]: Without dead ends: 31840 [2021-06-06 00:14:50,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 490.3ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:14:50,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31840 states. [2021-06-06 00:14:51,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31840 to 20067. [2021-06-06 00:14:51,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20067 states, 20066 states have (on average 3.888069371075451) internal successors, (78018), 20066 states have internal predecessors, (78018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:51,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20067 states to 20067 states and 78018 transitions. [2021-06-06 00:14:51,232 INFO L78 Accepts]: Start accepts. Automaton has 20067 states and 78018 transitions. Word has length 28 [2021-06-06 00:14:51,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:51,232 INFO L482 AbstractCegarLoop]: Abstraction has 20067 states and 78018 transitions. [2021-06-06 00:14:51,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:51,232 INFO L276 IsEmpty]: Start isEmpty. Operand 20067 states and 78018 transitions. [2021-06-06 00:14:51,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:51,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:51,262 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:51,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3971,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:51,462 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:51,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:51,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1685309107, now seen corresponding path program 112 times [2021-06-06 00:14:51,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:51,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891049771] [2021-06-06 00:14:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:51,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:51,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891049771] [2021-06-06 00:14:51,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891049771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:51,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969002503] [2021-06-06 00:14:51,502 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 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 [2021-06-06 00:14:51,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:14:51,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:51,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:51,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:51,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969002503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:51,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:51,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:14:51,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111898252] [2021-06-06 00:14:51,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:51,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:51,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:51,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:51,621 INFO L87 Difference]: Start difference. First operand 20067 states and 78018 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:53,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:53,147 INFO L93 Difference]: Finished difference Result 40672 states and 148990 transitions. [2021-06-06 00:14:53,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-06 00:14:53,148 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:53,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:53,239 INFO L225 Difference]: With dead ends: 40672 [2021-06-06 00:14:53,240 INFO L226 Difference]: Without dead ends: 40672 [2021-06-06 00:14:53,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 874.7ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-06 00:14:53,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40672 states. [2021-06-06 00:14:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40672 to 20072. [2021-06-06 00:14:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20072 states, 20071 states have (on average 3.8901400029893876) internal successors, (78079), 20071 states have internal predecessors, (78079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20072 states to 20072 states and 78079 transitions. [2021-06-06 00:14:53,831 INFO L78 Accepts]: Start accepts. Automaton has 20072 states and 78079 transitions. Word has length 28 [2021-06-06 00:14:53,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:53,831 INFO L482 AbstractCegarLoop]: Abstraction has 20072 states and 78079 transitions. [2021-06-06 00:14:53,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:53,831 INFO L276 IsEmpty]: Start isEmpty. Operand 20072 states and 78079 transitions. [2021-06-06 00:14:53,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:53,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:53,863 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:54,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3972,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:54,064 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:54,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:54,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1118357027, now seen corresponding path program 113 times [2021-06-06 00:14:54,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:54,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973230292] [2021-06-06 00:14:54,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:54,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:54,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973230292] [2021-06-06 00:14:54,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973230292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:54,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201693854] [2021-06-06 00:14:54,105 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 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 [2021-06-06 00:14:54,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:14:54,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:54,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:54,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:54,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201693854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:54,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:54,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:14:54,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970636174] [2021-06-06 00:14:54,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:14:54,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:54,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:14:54,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:14:54,224 INFO L87 Difference]: Start difference. First operand 20072 states and 78079 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:55,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:55,755 INFO L93 Difference]: Finished difference Result 40237 states and 148140 transitions. [2021-06-06 00:14:55,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-06 00:14:55,755 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:55,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:55,848 INFO L225 Difference]: With dead ends: 40237 [2021-06-06 00:14:55,849 INFO L226 Difference]: Without dead ends: 40237 [2021-06-06 00:14:55,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 874.6ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-06 00:14:55,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40237 states. [2021-06-06 00:14:56,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40237 to 19860. [2021-06-06 00:14:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19860 states, 19859 states have (on average 3.8822700035248503) internal successors, (77098), 19859 states have internal predecessors, (77098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:56,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19860 states to 19860 states and 77098 transitions. [2021-06-06 00:14:56,422 INFO L78 Accepts]: Start accepts. Automaton has 19860 states and 77098 transitions. Word has length 28 [2021-06-06 00:14:56,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:56,422 INFO L482 AbstractCegarLoop]: Abstraction has 19860 states and 77098 transitions. [2021-06-06 00:14:56,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:56,423 INFO L276 IsEmpty]: Start isEmpty. Operand 19860 states and 77098 transitions. [2021-06-06 00:14:56,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:56,451 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:56,451 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:56,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3973,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:56,652 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:56,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:56,652 INFO L82 PathProgramCache]: Analyzing trace with hash -182218355, now seen corresponding path program 114 times [2021-06-06 00:14:56,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:56,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52096417] [2021-06-06 00:14:56,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:56,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:56,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52096417] [2021-06-06 00:14:56,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52096417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:56,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865729133] [2021-06-06 00:14:56,681 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 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 [2021-06-06 00:14:56,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:14:56,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:56,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:14:56,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:14:56,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865729133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:56,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:56,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-06 00:14:56,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073817701] [2021-06-06 00:14:56,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:14:56,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:56,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:14:56,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:14:56,760 INFO L87 Difference]: Start difference. First operand 19860 states and 77098 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:57,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:57,035 INFO L93 Difference]: Finished difference Result 29387 states and 109674 transitions. [2021-06-06 00:14:57,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:14:57,035 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:57,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:57,103 INFO L225 Difference]: With dead ends: 29387 [2021-06-06 00:14:57,103 INFO L226 Difference]: Without dead ends: 29370 [2021-06-06 00:14:57,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:14:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29370 states. [2021-06-06 00:14:57,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29370 to 20128. [2021-06-06 00:14:57,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20128 states, 20127 states have (on average 3.887812391315149) internal successors, (78250), 20127 states have internal predecessors, (78250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20128 states to 20128 states and 78250 transitions. [2021-06-06 00:14:57,706 INFO L78 Accepts]: Start accepts. Automaton has 20128 states and 78250 transitions. Word has length 28 [2021-06-06 00:14:57,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:57,706 INFO L482 AbstractCegarLoop]: Abstraction has 20128 states and 78250 transitions. [2021-06-06 00:14:57,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:57,706 INFO L276 IsEmpty]: Start isEmpty. Operand 20128 states and 78250 transitions. [2021-06-06 00:14:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:57,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:57,745 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:57,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3974,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:14:57,945 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:57,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:57,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1325144395, now seen corresponding path program 115 times [2021-06-06 00:14:57,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:57,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371077719] [2021-06-06 00:14:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:57,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:57,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371077719] [2021-06-06 00:14:57,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371077719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:57,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195236714] [2021-06-06 00:14:57,976 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 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 [2021-06-06 00:14:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:58,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:14:58,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:14:58,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195236714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:58,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:58,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-06 00:14:58,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465305061] [2021-06-06 00:14:58,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:14:58,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:58,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:14:58,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:14:58,065 INFO L87 Difference]: Start difference. First operand 20128 states and 78250 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:58,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:14:58,377 INFO L93 Difference]: Finished difference Result 31182 states and 115264 transitions. [2021-06-06 00:14:58,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:14:58,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:14:58,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:14:58,455 INFO L225 Difference]: With dead ends: 31182 [2021-06-06 00:14:58,455 INFO L226 Difference]: Without dead ends: 31182 [2021-06-06 00:14:58,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:14:58,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31182 states. [2021-06-06 00:14:58,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31182 to 19797. [2021-06-06 00:14:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19797 states, 19796 states have (on average 3.8727015558698725) internal successors, (76664), 19796 states have internal predecessors, (76664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:58,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19797 states to 19797 states and 76664 transitions. [2021-06-06 00:14:58,936 INFO L78 Accepts]: Start accepts. Automaton has 19797 states and 76664 transitions. Word has length 28 [2021-06-06 00:14:58,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:14:58,936 INFO L482 AbstractCegarLoop]: Abstraction has 19797 states and 76664 transitions. [2021-06-06 00:14:58,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:14:58,936 INFO L276 IsEmpty]: Start isEmpty. Operand 19797 states and 76664 transitions. [2021-06-06 00:14:58,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:14:58,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:14:58,965 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:14:59,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3975 [2021-06-06 00:14:59,166 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:14:59,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:14:59,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1623141335, now seen corresponding path program 116 times [2021-06-06 00:14:59,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:14:59,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393382606] [2021-06-06 00:14:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:14:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:14:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:14:59,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:14:59,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393382606] [2021-06-06 00:14:59,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393382606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:59,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022423300] [2021-06-06 00:14:59,203 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 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 [2021-06-06 00:14:59,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:14:59,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:14:59,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:14:59,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:14:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:14:59,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022423300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:14:59,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:14:59,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:14:59,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076736901] [2021-06-06 00:14:59,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:14:59,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:14:59,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:14:59,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:14:59,300 INFO L87 Difference]: Start difference. First operand 19797 states and 76664 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:00,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:00,061 INFO L93 Difference]: Finished difference Result 29369 states and 109123 transitions. [2021-06-06 00:15:00,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:15:00,061 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:00,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:00,129 INFO L225 Difference]: With dead ends: 29369 [2021-06-06 00:15:00,129 INFO L226 Difference]: Without dead ends: 29369 [2021-06-06 00:15:00,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 402.1ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:15:00,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29369 states. [2021-06-06 00:15:00,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29369 to 19845. [2021-06-06 00:15:00,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19845 states, 19844 states have (on average 3.871497681918968) internal successors, (76826), 19844 states have internal predecessors, (76826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:00,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19845 states to 19845 states and 76826 transitions. [2021-06-06 00:15:00,593 INFO L78 Accepts]: Start accepts. Automaton has 19845 states and 76826 transitions. Word has length 28 [2021-06-06 00:15:00,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:00,593 INFO L482 AbstractCegarLoop]: Abstraction has 19845 states and 76826 transitions. [2021-06-06 00:15:00,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:00,594 INFO L276 IsEmpty]: Start isEmpty. Operand 19845 states and 76826 transitions. [2021-06-06 00:15:00,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:00,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:00,625 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:00,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3976,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:00,825 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:00,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:00,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1886911867, now seen corresponding path program 117 times [2021-06-06 00:15:00,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:00,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581948467] [2021-06-06 00:15:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:00,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:00,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581948467] [2021-06-06 00:15:00,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581948467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:00,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512048119] [2021-06-06 00:15:00,862 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 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 [2021-06-06 00:15:00,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:15:00,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:00,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:00,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:00,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512048119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:00,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:00,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:15:00,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611370063] [2021-06-06 00:15:00,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:15:00,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:00,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:15:00,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:15:00,961 INFO L87 Difference]: Start difference. First operand 19845 states and 76826 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:02,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:02,058 INFO L93 Difference]: Finished difference Result 30894 states and 113497 transitions. [2021-06-06 00:15:02,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-06 00:15:02,059 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:02,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:02,137 INFO L225 Difference]: With dead ends: 30894 [2021-06-06 00:15:02,138 INFO L226 Difference]: Without dead ends: 30894 [2021-06-06 00:15:02,138 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 626.0ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:15:02,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30894 states. [2021-06-06 00:15:02,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30894 to 20391. [2021-06-06 00:15:02,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20391 states, 20390 states have (on average 3.8505640019617458) internal successors, (78513), 20390 states have internal predecessors, (78513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20391 states to 20391 states and 78513 transitions. [2021-06-06 00:15:02,675 INFO L78 Accepts]: Start accepts. Automaton has 20391 states and 78513 transitions. Word has length 28 [2021-06-06 00:15:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:02,675 INFO L482 AbstractCegarLoop]: Abstraction has 20391 states and 78513 transitions. [2021-06-06 00:15:02,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 20391 states and 78513 transitions. [2021-06-06 00:15:02,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:02,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:02,706 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:02,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3977 [2021-06-06 00:15:02,907 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:02,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:02,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1931733009, now seen corresponding path program 118 times [2021-06-06 00:15:02,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:02,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530569123] [2021-06-06 00:15:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:02,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:02,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530569123] [2021-06-06 00:15:02,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530569123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:02,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255396483] [2021-06-06 00:15:02,944 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 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 [2021-06-06 00:15:02,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:15:02,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:02,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:02,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:03,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255396483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:03,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:03,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-06 00:15:03,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929874897] [2021-06-06 00:15:03,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:15:03,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:03,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:15:03,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:15:03,055 INFO L87 Difference]: Start difference. First operand 20391 states and 78513 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:04,028 INFO L93 Difference]: Finished difference Result 30020 states and 111194 transitions. [2021-06-06 00:15:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:15:04,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:04,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:04,101 INFO L225 Difference]: With dead ends: 30020 [2021-06-06 00:15:04,101 INFO L226 Difference]: Without dead ends: 30016 [2021-06-06 00:15:04,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 513.7ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:15:04,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30016 states. [2021-06-06 00:15:04,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30016 to 20283. [2021-06-06 00:15:04,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20283 states, 20282 states have (on average 3.8532196035893898) internal successors, (78151), 20282 states have internal predecessors, (78151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:04,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20283 states to 20283 states and 78151 transitions. [2021-06-06 00:15:04,607 INFO L78 Accepts]: Start accepts. Automaton has 20283 states and 78151 transitions. Word has length 28 [2021-06-06 00:15:04,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:04,607 INFO L482 AbstractCegarLoop]: Abstraction has 20283 states and 78151 transitions. [2021-06-06 00:15:04,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:04,607 INFO L276 IsEmpty]: Start isEmpty. Operand 20283 states and 78151 transitions. [2021-06-06 00:15:04,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:04,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:04,638 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:04,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3978 [2021-06-06 00:15:04,839 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:04,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:04,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1066349071, now seen corresponding path program 119 times [2021-06-06 00:15:04,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:04,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745845699] [2021-06-06 00:15:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:04,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:04,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745845699] [2021-06-06 00:15:04,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745845699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:04,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362542205] [2021-06-06 00:15:04,887 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 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 [2021-06-06 00:15:04,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:15:04,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:04,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:15:04,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-06 00:15:04,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362542205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:04,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:04,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-06 00:15:04,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273262518] [2021-06-06 00:15:04,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:15:04,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:04,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:15:04,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:15:04,974 INFO L87 Difference]: Start difference. First operand 20283 states and 78151 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:05,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:05,210 INFO L93 Difference]: Finished difference Result 25295 states and 94083 transitions. [2021-06-06 00:15:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:15:05,210 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:05,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:05,268 INFO L225 Difference]: With dead ends: 25295 [2021-06-06 00:15:05,268 INFO L226 Difference]: Without dead ends: 25295 [2021-06-06 00:15:05,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:15:05,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25295 states. [2021-06-06 00:15:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25295 to 20593. [2021-06-06 00:15:05,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20593 states, 20592 states have (on average 3.8444055944055946) internal successors, (79164), 20592 states have internal predecessors, (79164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20593 states to 20593 states and 79164 transitions. [2021-06-06 00:15:05,781 INFO L78 Accepts]: Start accepts. Automaton has 20593 states and 79164 transitions. Word has length 28 [2021-06-06 00:15:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:05,781 INFO L482 AbstractCegarLoop]: Abstraction has 20593 states and 79164 transitions. [2021-06-06 00:15:05,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 20593 states and 79164 transitions. [2021-06-06 00:15:05,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:05,813 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:05,813 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:06,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3979,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:06,014 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:06,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:06,014 INFO L82 PathProgramCache]: Analyzing trace with hash -136149327, now seen corresponding path program 120 times [2021-06-06 00:15:06,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:06,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137806468] [2021-06-06 00:15:06,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:06,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:06,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137806468] [2021-06-06 00:15:06,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137806468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:06,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673391193] [2021-06-06 00:15:06,059 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 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 [2021-06-06 00:15:06,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:15:06,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:06,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:06,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:15:06,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673391193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:06,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:06,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:15:06,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603216766] [2021-06-06 00:15:06,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:15:06,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:06,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:15:06,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:15:06,153 INFO L87 Difference]: Start difference. First operand 20593 states and 79164 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:07,016 INFO L93 Difference]: Finished difference Result 31016 states and 113583 transitions. [2021-06-06 00:15:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:15:07,016 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:07,088 INFO L225 Difference]: With dead ends: 31016 [2021-06-06 00:15:07,089 INFO L226 Difference]: Without dead ends: 31016 [2021-06-06 00:15:07,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 460.0ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-06 00:15:07,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31016 states. [2021-06-06 00:15:07,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31016 to 22203. [2021-06-06 00:15:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22203 states, 22202 states have (on average 3.856454373479867) internal successors, (85621), 22202 states have internal predecessors, (85621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:07,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22203 states to 22203 states and 85621 transitions. [2021-06-06 00:15:07,614 INFO L78 Accepts]: Start accepts. Automaton has 22203 states and 85621 transitions. Word has length 28 [2021-06-06 00:15:07,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:07,614 INFO L482 AbstractCegarLoop]: Abstraction has 22203 states and 85621 transitions. [2021-06-06 00:15:07,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:07,614 INFO L276 IsEmpty]: Start isEmpty. Operand 22203 states and 85621 transitions. [2021-06-06 00:15:07,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:07,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:07,646 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:07,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3980 [2021-06-06 00:15:07,847 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:07,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:07,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1975921655, now seen corresponding path program 121 times [2021-06-06 00:15:07,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:07,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259125849] [2021-06-06 00:15:07,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:07,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:07,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259125849] [2021-06-06 00:15:07,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259125849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:07,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758817373] [2021-06-06 00:15:07,884 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 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 [2021-06-06 00:15:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:07,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:07,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:15:07,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758817373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:07,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:07,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:15:07,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796424421] [2021-06-06 00:15:07,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:15:07,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:07,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:15:07,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:15:07,967 INFO L87 Difference]: Start difference. First operand 22203 states and 85621 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:08,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:08,659 INFO L93 Difference]: Finished difference Result 29255 states and 109041 transitions. [2021-06-06 00:15:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:15:08,659 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:08,733 INFO L225 Difference]: With dead ends: 29255 [2021-06-06 00:15:08,733 INFO L226 Difference]: Without dead ends: 29243 [2021-06-06 00:15:08,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 364.5ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:15:08,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29243 states. [2021-06-06 00:15:09,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29243 to 22351. [2021-06-06 00:15:09,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22351 states, 22350 states have (on average 3.8510514541387026) internal successors, (86071), 22350 states have internal predecessors, (86071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:09,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22351 states to 22351 states and 86071 transitions. [2021-06-06 00:15:09,394 INFO L78 Accepts]: Start accepts. Automaton has 22351 states and 86071 transitions. Word has length 28 [2021-06-06 00:15:09,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:09,394 INFO L482 AbstractCegarLoop]: Abstraction has 22351 states and 86071 transitions. [2021-06-06 00:15:09,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:09,394 INFO L276 IsEmpty]: Start isEmpty. Operand 22351 states and 86071 transitions. [2021-06-06 00:15:09,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:09,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:09,427 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:09,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:09,629 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:09,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:09,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1688262325, now seen corresponding path program 122 times [2021-06-06 00:15:09,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:09,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479082931] [2021-06-06 00:15:09,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:09,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:09,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479082931] [2021-06-06 00:15:09,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479082931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:09,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134734516] [2021-06-06 00:15:09,658 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 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 [2021-06-06 00:15:09,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:15:09,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:09,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:15:09,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:09,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:09,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134734516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:09,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:09,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-06 00:15:09,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335922343] [2021-06-06 00:15:09,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:15:09,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:09,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:15:09,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:15:09,734 INFO L87 Difference]: Start difference. First operand 22351 states and 86071 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-06-06 00:15:09,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:09,991 INFO L93 Difference]: Finished difference Result 25610 states and 97028 transitions. [2021-06-06 00:15:09,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:15:09,991 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 28 [2021-06-06 00:15:09,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:10,055 INFO L225 Difference]: With dead ends: 25610 [2021-06-06 00:15:10,056 INFO L226 Difference]: Without dead ends: 25610 [2021-06-06 00:15:10,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:15:10,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25610 states. [2021-06-06 00:15:10,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25610 to 23154. [2021-06-06 00:15:10,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23154 states, 23153 states have (on average 3.8461538461538463) internal successors, (89050), 23153 states have internal predecessors, (89050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23154 states to 23154 states and 89050 transitions. [2021-06-06 00:15:10,527 INFO L78 Accepts]: Start accepts. Automaton has 23154 states and 89050 transitions. Word has length 28 [2021-06-06 00:15:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:10,527 INFO L482 AbstractCegarLoop]: Abstraction has 23154 states and 89050 transitions. [2021-06-06 00:15:10,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-06-06 00:15:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 23154 states and 89050 transitions. [2021-06-06 00:15:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:10,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:10,562 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:10,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3982,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:10,771 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:10,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:10,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2131923893, now seen corresponding path program 123 times [2021-06-06 00:15:10,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:10,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556198466] [2021-06-06 00:15:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:10,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:10,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556198466] [2021-06-06 00:15:10,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556198466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:10,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866601882] [2021-06-06 00:15:10,816 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 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 [2021-06-06 00:15:10,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:15:10,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:10,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:10,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:10,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866601882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:10,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:10,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-06 00:15:10,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165159329] [2021-06-06 00:15:10,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:15:10,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:10,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:15:10,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:15:10,905 INFO L87 Difference]: Start difference. First operand 23154 states and 89050 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-06 00:15:11,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:11,673 INFO L93 Difference]: Finished difference Result 30991 states and 114399 transitions. [2021-06-06 00:15:11,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-06 00:15:11,674 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-06 00:15:11,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:11,747 INFO L225 Difference]: With dead ends: 30991 [2021-06-06 00:15:11,747 INFO L226 Difference]: Without dead ends: 30991 [2021-06-06 00:15:11,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 426.6ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:15:11,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30991 states. [2021-06-06 00:15:12,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30991 to 24366. [2021-06-06 00:15:12,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24366 states, 24365 states have (on average 3.8139134003693824) internal successors, (92926), 24365 states have internal predecessors, (92926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:12,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24366 states to 24366 states and 92926 transitions. [2021-06-06 00:15:12,334 INFO L78 Accepts]: Start accepts. Automaton has 24366 states and 92926 transitions. Word has length 28 [2021-06-06 00:15:12,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:12,334 INFO L482 AbstractCegarLoop]: Abstraction has 24366 states and 92926 transitions. [2021-06-06 00:15:12,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-06 00:15:12,334 INFO L276 IsEmpty]: Start isEmpty. Operand 24366 states and 92926 transitions. [2021-06-06 00:15:12,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:12,375 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:12,375 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:12,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:12,576 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:12,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:12,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1422950451, now seen corresponding path program 124 times [2021-06-06 00:15:12,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:12,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481747111] [2021-06-06 00:15:12,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:12,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:12,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481747111] [2021-06-06 00:15:12,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481747111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:12,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135789575] [2021-06-06 00:15:12,609 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 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 [2021-06-06 00:15:12,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:15:12,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:12,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:12,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:12,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135789575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:12,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:12,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:15:12,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823215774] [2021-06-06 00:15:12,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:15:12,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:12,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:15:12,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:15:12,689 INFO L87 Difference]: Start difference. First operand 24366 states and 92926 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:15:13,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:13,364 INFO L93 Difference]: Finished difference Result 30092 states and 112016 transitions. [2021-06-06 00:15:13,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:15:13,364 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-06 00:15:13,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:13,440 INFO L225 Difference]: With dead ends: 30092 [2021-06-06 00:15:13,440 INFO L226 Difference]: Without dead ends: 30084 [2021-06-06 00:15:13,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 378.6ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:15:13,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30084 states. [2021-06-06 00:15:13,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30084 to 24188. [2021-06-06 00:15:13,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24188 states, 24187 states have (on average 3.820027287385786) internal successors, (92395), 24187 states have internal predecessors, (92395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24188 states to 24188 states and 92395 transitions. [2021-06-06 00:15:13,974 INFO L78 Accepts]: Start accepts. Automaton has 24188 states and 92395 transitions. Word has length 28 [2021-06-06 00:15:13,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:13,974 INFO L482 AbstractCegarLoop]: Abstraction has 24188 states and 92395 transitions. [2021-06-06 00:15:13,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:15:13,974 INFO L276 IsEmpty]: Start isEmpty. Operand 24188 states and 92395 transitions. [2021-06-06 00:15:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:14,014 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:14,014 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:14,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3984,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:14,214 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:14,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:14,215 INFO L82 PathProgramCache]: Analyzing trace with hash 27046477, now seen corresponding path program 125 times [2021-06-06 00:15:14,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:14,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392504127] [2021-06-06 00:15:14,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:14,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:14,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392504127] [2021-06-06 00:15:14,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392504127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:14,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692122477] [2021-06-06 00:15:14,247 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 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 [2021-06-06 00:15:14,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:15:14,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:14,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:14,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:14,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692122477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:14,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:14,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:15:14,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400482496] [2021-06-06 00:15:14,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:15:14,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:14,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:15:14,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:15:14,343 INFO L87 Difference]: Start difference. First operand 24188 states and 92395 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:15:15,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:15,111 INFO L93 Difference]: Finished difference Result 31919 states and 117608 transitions. [2021-06-06 00:15:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-06 00:15:15,112 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-06 00:15:15,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:15,184 INFO L225 Difference]: With dead ends: 31919 [2021-06-06 00:15:15,184 INFO L226 Difference]: Without dead ends: 31919 [2021-06-06 00:15:15,184 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 416.6ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-06 00:15:15,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31919 states. [2021-06-06 00:15:15,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31919 to 25212. [2021-06-06 00:15:15,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25212 states, 25211 states have (on average 3.796160406171909) internal successors, (95705), 25211 states have internal predecessors, (95705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25212 states to 25212 states and 95705 transitions. [2021-06-06 00:15:15,799 INFO L78 Accepts]: Start accepts. Automaton has 25212 states and 95705 transitions. Word has length 28 [2021-06-06 00:15:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:15,799 INFO L482 AbstractCegarLoop]: Abstraction has 25212 states and 95705 transitions. [2021-06-06 00:15:15,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:15:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 25212 states and 95705 transitions. [2021-06-06 00:15:15,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:15,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:15,837 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:16,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3985,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:16,038 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:16,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:16,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1055976179, now seen corresponding path program 126 times [2021-06-06 00:15:16,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:16,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703345295] [2021-06-06 00:15:16,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:16,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:16,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703345295] [2021-06-06 00:15:16,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703345295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:16,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309425644] [2021-06-06 00:15:16,088 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 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 [2021-06-06 00:15:16,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:15:16,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:16,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:15:16,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:16,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309425644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:16,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:16,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-06 00:15:16,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847010387] [2021-06-06 00:15:16,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:15:16,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:16,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:15:16,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:15:16,180 INFO L87 Difference]: Start difference. First operand 25212 states and 95705 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-06 00:15:16,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:16,572 INFO L93 Difference]: Finished difference Result 30875 states and 116320 transitions. [2021-06-06 00:15:16,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:15:16,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-06-06 00:15:16,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:16,650 INFO L225 Difference]: With dead ends: 30875 [2021-06-06 00:15:16,650 INFO L226 Difference]: Without dead ends: 30862 [2021-06-06 00:15:16,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:15:16,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30862 states. [2021-06-06 00:15:17,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30862 to 29308. [2021-06-06 00:15:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29308 states, 29307 states have (on average 3.8146517896748215) internal successors, (111796), 29307 states have internal predecessors, (111796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:17,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29308 states to 29308 states and 111796 transitions. [2021-06-06 00:15:17,350 INFO L78 Accepts]: Start accepts. Automaton has 29308 states and 111796 transitions. Word has length 28 [2021-06-06 00:15:17,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:17,350 INFO L482 AbstractCegarLoop]: Abstraction has 29308 states and 111796 transitions. [2021-06-06 00:15:17,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-06 00:15:17,350 INFO L276 IsEmpty]: Start isEmpty. Operand 29308 states and 111796 transitions. [2021-06-06 00:15:17,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:17,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:17,397 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:17,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3986,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:17,597 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:17,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:17,597 INFO L82 PathProgramCache]: Analyzing trace with hash 415101939, now seen corresponding path program 127 times [2021-06-06 00:15:17,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:17,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548645113] [2021-06-06 00:15:17,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:17,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:17,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548645113] [2021-06-06 00:15:17,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548645113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:17,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197378933] [2021-06-06 00:15:17,631 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 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 [2021-06-06 00:15:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:17,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:15:17,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:17,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197378933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:17,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:17,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-06 00:15:17,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82269925] [2021-06-06 00:15:17,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:15:17,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:17,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:15:17,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:15:17,707 INFO L87 Difference]: Start difference. First operand 29308 states and 111796 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-06 00:15:18,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:18,074 INFO L93 Difference]: Finished difference Result 32311 states and 121127 transitions. [2021-06-06 00:15:18,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:15:18,074 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-06-06 00:15:18,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:18,147 INFO L225 Difference]: With dead ends: 32311 [2021-06-06 00:15:18,148 INFO L226 Difference]: Without dead ends: 32311 [2021-06-06 00:15:18,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:15:18,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32311 states. [2021-06-06 00:15:18,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32311 to 29053. [2021-06-06 00:15:18,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29053 states, 29052 states have (on average 3.81099407958144) internal successors, (110717), 29052 states have internal predecessors, (110717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:18,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29053 states to 29053 states and 110717 transitions. [2021-06-06 00:15:18,789 INFO L78 Accepts]: Start accepts. Automaton has 29053 states and 110717 transitions. Word has length 28 [2021-06-06 00:15:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:18,789 INFO L482 AbstractCegarLoop]: Abstraction has 29053 states and 110717 transitions. [2021-06-06 00:15:18,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-06 00:15:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 29053 states and 110717 transitions. [2021-06-06 00:15:18,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:18,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:18,837 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:19,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3987 [2021-06-06 00:15:19,037 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:19,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:19,038 INFO L82 PathProgramCache]: Analyzing trace with hash -17774665, now seen corresponding path program 128 times [2021-06-06 00:15:19,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:19,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061395495] [2021-06-06 00:15:19,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:19,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:19,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061395495] [2021-06-06 00:15:19,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061395495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:19,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167888910] [2021-06-06 00:15:19,070 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 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 [2021-06-06 00:15:19,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:15:19,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:19,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:19,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:19,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167888910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:19,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:19,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:15:19,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056816164] [2021-06-06 00:15:19,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:15:19,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:19,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:15:19,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:15:19,148 INFO L87 Difference]: Start difference. First operand 29053 states and 110717 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:15:19,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:19,749 INFO L93 Difference]: Finished difference Result 35470 states and 132021 transitions. [2021-06-06 00:15:19,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:15:19,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-06 00:15:19,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:19,834 INFO L225 Difference]: With dead ends: 35470 [2021-06-06 00:15:19,835 INFO L226 Difference]: Without dead ends: 35462 [2021-06-06 00:15:19,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:15:19,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35462 states. [2021-06-06 00:15:20,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35462 to 29019. [2021-06-06 00:15:20,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29019 states, 29018 states have (on average 3.8114273898959268) internal successors, (110600), 29018 states have internal predecessors, (110600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:20,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29019 states to 29019 states and 110600 transitions. [2021-06-06 00:15:20,715 INFO L78 Accepts]: Start accepts. Automaton has 29019 states and 110600 transitions. Word has length 28 [2021-06-06 00:15:20,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:20,715 INFO L482 AbstractCegarLoop]: Abstraction has 29019 states and 110600 transitions. [2021-06-06 00:15:20,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:15:20,715 INFO L276 IsEmpty]: Start isEmpty. Operand 29019 states and 110600 transitions. [2021-06-06 00:15:20,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:20,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:20,765 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:20,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3988,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:20,966 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:20,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:20,966 INFO L82 PathProgramCache]: Analyzing trace with hash -913595481, now seen corresponding path program 129 times [2021-06-06 00:15:20,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:20,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929569851] [2021-06-06 00:15:20,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:21,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:21,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929569851] [2021-06-06 00:15:21,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929569851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:21,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136828980] [2021-06-06 00:15:21,003 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 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 [2021-06-06 00:15:21,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:15:21,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:21,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:15:21,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:21,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136828980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:21,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:21,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-06 00:15:21,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145570629] [2021-06-06 00:15:21,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:15:21,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:21,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:15:21,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:15:21,085 INFO L87 Difference]: Start difference. First operand 29019 states and 110600 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-06 00:15:21,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:21,552 INFO L93 Difference]: Finished difference Result 31865 states and 120062 transitions. [2021-06-06 00:15:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:15:21,553 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-06-06 00:15:21,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:21,636 INFO L225 Difference]: With dead ends: 31865 [2021-06-06 00:15:21,636 INFO L226 Difference]: Without dead ends: 31865 [2021-06-06 00:15:21,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:15:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31865 states. [2021-06-06 00:15:22,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31865 to 29551. [2021-06-06 00:15:22,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29551 states, 29550 states have (on average 3.8099492385786804) internal successors, (112584), 29550 states have internal predecessors, (112584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:22,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29551 states to 29551 states and 112584 transitions. [2021-06-06 00:15:22,248 INFO L78 Accepts]: Start accepts. Automaton has 29551 states and 112584 transitions. Word has length 28 [2021-06-06 00:15:22,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:22,248 INFO L482 AbstractCegarLoop]: Abstraction has 29551 states and 112584 transitions. [2021-06-06 00:15:22,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-06 00:15:22,248 INFO L276 IsEmpty]: Start isEmpty. Operand 29551 states and 112584 transitions. [2021-06-06 00:15:22,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:22,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:22,294 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:22,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3989 [2021-06-06 00:15:22,495 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:22,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:22,495 INFO L82 PathProgramCache]: Analyzing trace with hash 579561993, now seen corresponding path program 130 times [2021-06-06 00:15:22,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:22,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646489718] [2021-06-06 00:15:22,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:22,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:22,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646489718] [2021-06-06 00:15:22,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646489718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:22,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606088380] [2021-06-06 00:15:22,553 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 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 [2021-06-06 00:15:22,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:15:22,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:22,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:22,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:22,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606088380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:22,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:22,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:15:22,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685208301] [2021-06-06 00:15:22,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:15:22,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:22,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:15:22,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:15:22,641 INFO L87 Difference]: Start difference. First operand 29551 states and 112584 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:15:23,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:23,252 INFO L93 Difference]: Finished difference Result 36395 states and 135424 transitions. [2021-06-06 00:15:23,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:15:23,252 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-06 00:15:23,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:23,338 INFO L225 Difference]: With dead ends: 36395 [2021-06-06 00:15:23,338 INFO L226 Difference]: Without dead ends: 36371 [2021-06-06 00:15:23,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:15:23,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36371 states. [2021-06-06 00:15:23,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36371 to 29723. [2021-06-06 00:15:24,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29723 states, 29722 states have (on average 3.8058677074221117) internal successors, (113118), 29722 states have internal predecessors, (113118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:24,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29723 states to 29723 states and 113118 transitions. [2021-06-06 00:15:24,106 INFO L78 Accepts]: Start accepts. Automaton has 29723 states and 113118 transitions. Word has length 28 [2021-06-06 00:15:24,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:24,106 INFO L482 AbstractCegarLoop]: Abstraction has 29723 states and 113118 transitions. [2021-06-06 00:15:24,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:15:24,106 INFO L276 IsEmpty]: Start isEmpty. Operand 29723 states and 113118 transitions. [2021-06-06 00:15:24,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:24,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:24,153 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:24,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3990 [2021-06-06 00:15:24,354 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:24,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:24,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1271447701, now seen corresponding path program 131 times [2021-06-06 00:15:24,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:24,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610693474] [2021-06-06 00:15:24,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:24,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:24,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610693474] [2021-06-06 00:15:24,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610693474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:24,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116664857] [2021-06-06 00:15:24,394 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 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 [2021-06-06 00:15:24,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:15:24,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:24,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:15:24,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:24,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116664857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:24,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:24,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-06 00:15:24,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261986007] [2021-06-06 00:15:24,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:15:24,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:24,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:15:24,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:15:24,473 INFO L87 Difference]: Start difference. First operand 29723 states and 113118 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-06 00:15:24,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:24,946 INFO L93 Difference]: Finished difference Result 32279 states and 121530 transitions. [2021-06-06 00:15:24,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:15:24,947 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-06-06 00:15:24,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:25,199 INFO L225 Difference]: With dead ends: 32279 [2021-06-06 00:15:25,199 INFO L226 Difference]: Without dead ends: 32279 [2021-06-06 00:15:25,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 225.0ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:15:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32279 states. [2021-06-06 00:15:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32279 to 29649. [2021-06-06 00:15:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29649 states, 29648 states have (on average 3.8067323259579062) internal successors, (112862), 29648 states have internal predecessors, (112862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29649 states to 29649 states and 112862 transitions. [2021-06-06 00:15:26,121 INFO L78 Accepts]: Start accepts. Automaton has 29649 states and 112862 transitions. Word has length 28 [2021-06-06 00:15:26,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:26,121 INFO L482 AbstractCegarLoop]: Abstraction has 29649 states and 112862 transitions. [2021-06-06 00:15:26,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-06 00:15:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 29649 states and 112862 transitions. [2021-06-06 00:15:26,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:26,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:26,172 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:26,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3991 [2021-06-06 00:15:26,372 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:26,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:26,372 INFO L82 PathProgramCache]: Analyzing trace with hash -412931571, now seen corresponding path program 132 times [2021-06-06 00:15:26,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:26,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962275989] [2021-06-06 00:15:26,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:26,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:26,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962275989] [2021-06-06 00:15:26,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962275989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:26,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805217212] [2021-06-06 00:15:26,416 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 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 [2021-06-06 00:15:26,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:15:26,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:26,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:26,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:26,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805217212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:26,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:26,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-06 00:15:26,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633585759] [2021-06-06 00:15:26,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:15:26,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:26,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:15:26,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:15:26,523 INFO L87 Difference]: Start difference. First operand 29649 states and 112862 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-06 00:15:27,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:27,412 INFO L93 Difference]: Finished difference Result 36318 states and 135165 transitions. [2021-06-06 00:15:27,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:15:27,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-06 00:15:27,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:27,514 INFO L225 Difference]: With dead ends: 36318 [2021-06-06 00:15:27,514 INFO L226 Difference]: Without dead ends: 36278 [2021-06-06 00:15:27,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:15:27,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36278 states. [2021-06-06 00:15:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36278 to 29805. [2021-06-06 00:15:28,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29805 states, 29804 states have (on average 3.80284525567038) internal successors, (113340), 29804 states have internal predecessors, (113340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:28,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29805 states to 29805 states and 113340 transitions. [2021-06-06 00:15:28,296 INFO L78 Accepts]: Start accepts. Automaton has 29805 states and 113340 transitions. Word has length 28 [2021-06-06 00:15:28,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:28,296 INFO L482 AbstractCegarLoop]: Abstraction has 29805 states and 113340 transitions. [2021-06-06 00:15:28,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-06 00:15:28,297 INFO L276 IsEmpty]: Start isEmpty. Operand 29805 states and 113340 transitions. [2021-06-06 00:15:28,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:28,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:28,481 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:28,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3992,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:28,697 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:28,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:28,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1625942477, now seen corresponding path program 133 times [2021-06-06 00:15:28,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:28,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018282070] [2021-06-06 00:15:28,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:28,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:28,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018282070] [2021-06-06 00:15:28,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018282070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:28,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715798011] [2021-06-06 00:15:28,729 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 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 [2021-06-06 00:15:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:28,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:28,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:28,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715798011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:28,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:28,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:15:28,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170250398] [2021-06-06 00:15:28,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:15:28,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:28,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:15:28,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:15:28,857 INFO L87 Difference]: Start difference. First operand 29805 states and 113340 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:30,300 INFO L93 Difference]: Finished difference Result 68211 states and 251076 transitions. [2021-06-06 00:15:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:15:30,301 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:30,496 INFO L225 Difference]: With dead ends: 68211 [2021-06-06 00:15:30,497 INFO L226 Difference]: Without dead ends: 68211 [2021-06-06 00:15:30,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 669.9ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:15:30,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68211 states. [2021-06-06 00:15:31,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68211 to 37529. [2021-06-06 00:15:31,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37529 states, 37528 states have (on average 3.8846727776593477) internal successors, (145784), 37528 states have internal predecessors, (145784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:31,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37529 states to 37529 states and 145784 transitions. [2021-06-06 00:15:31,899 INFO L78 Accepts]: Start accepts. Automaton has 37529 states and 145784 transitions. Word has length 28 [2021-06-06 00:15:31,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:31,899 INFO L482 AbstractCegarLoop]: Abstraction has 37529 states and 145784 transitions. [2021-06-06 00:15:31,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:31,899 INFO L276 IsEmpty]: Start isEmpty. Operand 37529 states and 145784 transitions. [2021-06-06 00:15:31,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:31,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:31,956 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:32,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3993,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:32,156 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:32,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:32,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2102072739, now seen corresponding path program 134 times [2021-06-06 00:15:32,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:32,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478755748] [2021-06-06 00:15:32,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:32,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:32,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478755748] [2021-06-06 00:15:32,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478755748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:32,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60561084] [2021-06-06 00:15:32,189 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 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 [2021-06-06 00:15:32,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:15:32,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:32,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:32,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:32,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60561084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:32,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:32,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:15:32,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755278880] [2021-06-06 00:15:32,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:15:32,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:32,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:15:32,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:15:32,313 INFO L87 Difference]: Start difference. First operand 37529 states and 145784 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:33,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:33,965 INFO L93 Difference]: Finished difference Result 67584 states and 249415 transitions. [2021-06-06 00:15:33,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:15:33,966 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:33,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:34,151 INFO L225 Difference]: With dead ends: 67584 [2021-06-06 00:15:34,152 INFO L226 Difference]: Without dead ends: 67584 [2021-06-06 00:15:34,152 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 675.5ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:15:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67584 states. [2021-06-06 00:15:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67584 to 37526. [2021-06-06 00:15:35,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37526 states, 37525 states have (on average 3.884610259826782) internal successors, (145770), 37525 states have internal predecessors, (145770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37526 states to 37526 states and 145770 transitions. [2021-06-06 00:15:35,582 INFO L78 Accepts]: Start accepts. Automaton has 37526 states and 145770 transitions. Word has length 28 [2021-06-06 00:15:35,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:35,583 INFO L482 AbstractCegarLoop]: Abstraction has 37526 states and 145770 transitions. [2021-06-06 00:15:35,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 37526 states and 145770 transitions. [2021-06-06 00:15:35,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:35,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:35,649 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:35,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3994,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:35,850 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:35,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:35,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1020548699, now seen corresponding path program 135 times [2021-06-06 00:15:35,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:35,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067767622] [2021-06-06 00:15:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:35,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:35,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067767622] [2021-06-06 00:15:35,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067767622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:35,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533978133] [2021-06-06 00:15:35,885 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 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 [2021-06-06 00:15:35,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:15:35,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:35,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:35,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:36,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533978133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:36,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:36,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:15:36,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777099715] [2021-06-06 00:15:36,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:15:36,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:36,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:15:36,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:15:36,012 INFO L87 Difference]: Start difference. First operand 37526 states and 145770 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:15:37,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:37,396 INFO L93 Difference]: Finished difference Result 62987 states and 233868 transitions. [2021-06-06 00:15:37,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:15:37,397 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-06 00:15:37,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:37,788 INFO L225 Difference]: With dead ends: 62987 [2021-06-06 00:15:37,788 INFO L226 Difference]: Without dead ends: 62987 [2021-06-06 00:15:37,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 601.9ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-06 00:15:37,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62987 states. [2021-06-06 00:15:38,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62987 to 37548. [2021-06-06 00:15:38,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37548 states, 37547 states have (on average 3.8849175699789598) internal successors, (145867), 37547 states have internal predecessors, (145867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37548 states to 37548 states and 145867 transitions. [2021-06-06 00:15:39,205 INFO L78 Accepts]: Start accepts. Automaton has 37548 states and 145867 transitions. Word has length 28 [2021-06-06 00:15:39,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:39,206 INFO L482 AbstractCegarLoop]: Abstraction has 37548 states and 145867 transitions. [2021-06-06 00:15:39,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:15:39,206 INFO L276 IsEmpty]: Start isEmpty. Operand 37548 states and 145867 transitions. [2021-06-06 00:15:39,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:39,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:39,272 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:39,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:39,472 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:39,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:39,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1101924787, now seen corresponding path program 136 times [2021-06-06 00:15:39,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:39,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638694772] [2021-06-06 00:15:39,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:39,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:39,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638694772] [2021-06-06 00:15:39,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638694772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:39,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080726257] [2021-06-06 00:15:39,508 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 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 [2021-06-06 00:15:39,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:15:39,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:39,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:39,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:39,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:39,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080726257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:39,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:39,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:15:39,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835299690] [2021-06-06 00:15:39,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:15:39,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:39,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:15:39,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:15:39,625 INFO L87 Difference]: Start difference. First operand 37548 states and 145867 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:15:41,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:41,074 INFO L93 Difference]: Finished difference Result 62120 states and 231628 transitions. [2021-06-06 00:15:41,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:15:41,075 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-06 00:15:41,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:41,269 INFO L225 Difference]: With dead ends: 62120 [2021-06-06 00:15:41,269 INFO L226 Difference]: Without dead ends: 62112 [2021-06-06 00:15:41,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 539.2ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:15:41,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62112 states. [2021-06-06 00:15:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62112 to 37548. [2021-06-06 00:15:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37548 states, 37547 states have (on average 3.8847577702612726) internal successors, (145861), 37547 states have internal predecessors, (145861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37548 states to 37548 states and 145861 transitions. [2021-06-06 00:15:42,469 INFO L78 Accepts]: Start accepts. Automaton has 37548 states and 145861 transitions. Word has length 28 [2021-06-06 00:15:42,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:42,469 INFO L482 AbstractCegarLoop]: Abstraction has 37548 states and 145861 transitions. [2021-06-06 00:15:42,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:15:42,469 INFO L276 IsEmpty]: Start isEmpty. Operand 37548 states and 145861 transitions. [2021-06-06 00:15:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:42,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:42,528 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:42,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3996,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:42,729 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:42,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:42,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2032582003, now seen corresponding path program 137 times [2021-06-06 00:15:42,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:42,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479562634] [2021-06-06 00:15:42,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:42,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:42,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479562634] [2021-06-06 00:15:42,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479562634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:42,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234033907] [2021-06-06 00:15:42,761 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 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 [2021-06-06 00:15:42,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:15:42,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:42,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:42,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:42,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234033907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:42,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:42,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:15:42,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305173113] [2021-06-06 00:15:42,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:15:42,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:42,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:15:42,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:15:42,884 INFO L87 Difference]: Start difference. First operand 37548 states and 145861 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:43,115 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 9 [2021-06-06 00:15:44,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:44,247 INFO L93 Difference]: Finished difference Result 61801 states and 230767 transitions. [2021-06-06 00:15:44,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:15:44,248 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:44,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:44,422 INFO L225 Difference]: With dead ends: 61801 [2021-06-06 00:15:44,422 INFO L226 Difference]: Without dead ends: 61801 [2021-06-06 00:15:44,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 777.6ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:15:44,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61801 states. [2021-06-06 00:15:45,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61801 to 37556. [2021-06-06 00:15:45,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37556 states, 37555 states have (on average 3.884835574490747) internal successors, (145895), 37555 states have internal predecessors, (145895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:45,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37556 states to 37556 states and 145895 transitions. [2021-06-06 00:15:45,930 INFO L78 Accepts]: Start accepts. Automaton has 37556 states and 145895 transitions. Word has length 28 [2021-06-06 00:15:45,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:45,930 INFO L482 AbstractCegarLoop]: Abstraction has 37556 states and 145895 transitions. [2021-06-06 00:15:45,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:45,930 INFO L276 IsEmpty]: Start isEmpty. Operand 37556 states and 145895 transitions. [2021-06-06 00:15:45,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:45,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:45,987 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:46,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3997 [2021-06-06 00:15:46,188 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:46,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:46,188 INFO L82 PathProgramCache]: Analyzing trace with hash -619346139, now seen corresponding path program 138 times [2021-06-06 00:15:46,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:46,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067487548] [2021-06-06 00:15:46,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:46,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:46,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067487548] [2021-06-06 00:15:46,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067487548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:46,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556533749] [2021-06-06 00:15:46,220 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 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 [2021-06-06 00:15:46,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:15:46,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:46,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:46,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:46,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556533749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:46,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:46,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:15:46,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086902137] [2021-06-06 00:15:46,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:15:46,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:46,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:15:46,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:15:46,339 INFO L87 Difference]: Start difference. First operand 37556 states and 145895 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:47,689 INFO L93 Difference]: Finished difference Result 61590 states and 230241 transitions. [2021-06-06 00:15:47,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:15:47,690 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:15:47,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:47,852 INFO L225 Difference]: With dead ends: 61590 [2021-06-06 00:15:47,852 INFO L226 Difference]: Without dead ends: 61582 [2021-06-06 00:15:47,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 508.9ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:15:47,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61582 states. [2021-06-06 00:15:48,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61582 to 37556. [2021-06-06 00:15:49,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37556 states, 37555 states have (on average 3.884782319265078) internal successors, (145893), 37555 states have internal predecessors, (145893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:49,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37556 states to 37556 states and 145893 transitions. [2021-06-06 00:15:49,139 INFO L78 Accepts]: Start accepts. Automaton has 37556 states and 145893 transitions. Word has length 28 [2021-06-06 00:15:49,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:49,139 INFO L482 AbstractCegarLoop]: Abstraction has 37556 states and 145893 transitions. [2021-06-06 00:15:49,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:49,139 INFO L276 IsEmpty]: Start isEmpty. Operand 37556 states and 145893 transitions. [2021-06-06 00:15:49,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:49,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:49,201 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:49,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3998,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:49,401 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:49,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:49,401 INFO L82 PathProgramCache]: Analyzing trace with hash 384081845, now seen corresponding path program 139 times [2021-06-06 00:15:49,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:49,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266491683] [2021-06-06 00:15:49,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:49,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:49,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266491683] [2021-06-06 00:15:49,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266491683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:49,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606533201] [2021-06-06 00:15:49,435 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 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 [2021-06-06 00:15:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:49,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:49,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:49,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606533201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:49,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:49,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:15:49,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155479004] [2021-06-06 00:15:49,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:15:49,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:49,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:15:49,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:15:49,764 INFO L87 Difference]: Start difference. First operand 37556 states and 145893 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-06 00:15:51,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:51,008 INFO L93 Difference]: Finished difference Result 60972 states and 226630 transitions. [2021-06-06 00:15:51,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:15:51,009 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-06 00:15:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:51,176 INFO L225 Difference]: With dead ends: 60972 [2021-06-06 00:15:51,176 INFO L226 Difference]: Without dead ends: 60972 [2021-06-06 00:15:51,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 649.5ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-06 00:15:51,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60972 states. [2021-06-06 00:15:52,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60972 to 40355. [2021-06-06 00:15:52,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40355 states, 40354 states have (on average 3.8889081627595776) internal successors, (156933), 40354 states have internal predecessors, (156933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:52,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40355 states to 40355 states and 156933 transitions. [2021-06-06 00:15:52,635 INFO L78 Accepts]: Start accepts. Automaton has 40355 states and 156933 transitions. Word has length 28 [2021-06-06 00:15:52,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:52,635 INFO L482 AbstractCegarLoop]: Abstraction has 40355 states and 156933 transitions. [2021-06-06 00:15:52,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-06 00:15:52,635 INFO L276 IsEmpty]: Start isEmpty. Operand 40355 states and 156933 transitions. [2021-06-06 00:15:52,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:52,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:52,697 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:52,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3999 [2021-06-06 00:15:52,897 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:52,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:52,898 INFO L82 PathProgramCache]: Analyzing trace with hash 465457933, now seen corresponding path program 140 times [2021-06-06 00:15:52,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:52,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838354417] [2021-06-06 00:15:52,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:52,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:52,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838354417] [2021-06-06 00:15:52,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838354417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:52,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477516474] [2021-06-06 00:15:52,931 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 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 [2021-06-06 00:15:52,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:15:52,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:52,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:52,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:53,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477516474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:53,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:53,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:15:53,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489131423] [2021-06-06 00:15:53,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:15:53,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:53,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:15:53,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:15:53,031 INFO L87 Difference]: Start difference. First operand 40355 states and 156933 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-06 00:15:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:54,306 INFO L93 Difference]: Finished difference Result 60488 states and 225357 transitions. [2021-06-06 00:15:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:15:54,313 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-06 00:15:54,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:54,517 INFO L225 Difference]: With dead ends: 60488 [2021-06-06 00:15:54,517 INFO L226 Difference]: Without dead ends: 60480 [2021-06-06 00:15:54,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 497.2ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:15:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60480 states. [2021-06-06 00:15:55,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60480 to 40081. [2021-06-06 00:15:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40081 states, 40080 states have (on average 3.8941616766467066) internal successors, (156078), 40080 states have internal predecessors, (156078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:55,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40081 states to 40081 states and 156078 transitions. [2021-06-06 00:15:55,842 INFO L78 Accepts]: Start accepts. Automaton has 40081 states and 156078 transitions. Word has length 28 [2021-06-06 00:15:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:55,842 INFO L482 AbstractCegarLoop]: Abstraction has 40081 states and 156078 transitions. [2021-06-06 00:15:55,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-06 00:15:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 40081 states and 156078 transitions. [2021-06-06 00:15:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:55,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:55,910 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:56,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4000 [2021-06-06 00:15:56,111 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:56,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:56,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1049634039, now seen corresponding path program 141 times [2021-06-06 00:15:56,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:56,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842513598] [2021-06-06 00:15:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:56,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:56,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:56,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842513598] [2021-06-06 00:15:56,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842513598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:56,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516204565] [2021-06-06 00:15:56,146 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 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 [2021-06-06 00:15:56,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:15:56,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:56,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:56,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:56,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516204565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:56,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:56,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:15:56,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828379394] [2021-06-06 00:15:56,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:15:56,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:56,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:15:56,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:15:56,253 INFO L87 Difference]: Start difference. First operand 40081 states and 156078 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-06 00:15:57,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:15:57,425 INFO L93 Difference]: Finished difference Result 59033 states and 221360 transitions. [2021-06-06 00:15:57,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:15:57,425 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-06 00:15:57,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:15:57,605 INFO L225 Difference]: With dead ends: 59033 [2021-06-06 00:15:57,606 INFO L226 Difference]: Without dead ends: 59009 [2021-06-06 00:15:57,606 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 383.0ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:15:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59009 states. [2021-06-06 00:15:58,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59009 to 39991. [2021-06-06 00:15:58,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39991 states, 39990 states have (on average 3.893998499624906) internal successors, (155721), 39990 states have internal predecessors, (155721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:15:58,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39991 states to 39991 states and 155721 transitions. [2021-06-06 00:15:58,921 INFO L78 Accepts]: Start accepts. Automaton has 39991 states and 155721 transitions. Word has length 28 [2021-06-06 00:15:58,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:15:58,921 INFO L482 AbstractCegarLoop]: Abstraction has 39991 states and 155721 transitions. [2021-06-06 00:15:58,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-06 00:15:58,922 INFO L276 IsEmpty]: Start isEmpty. Operand 39991 states and 155721 transitions. [2021-06-06 00:15:58,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:15:58,982 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:15:58,983 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:15:59,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4001,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:15:59,184 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:15:59,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:15:59,184 INFO L82 PathProgramCache]: Analyzing trace with hash 547492677, now seen corresponding path program 142 times [2021-06-06 00:15:59,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:15:59,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755850333] [2021-06-06 00:15:59,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:15:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:15:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:15:59,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:15:59,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755850333] [2021-06-06 00:15:59,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755850333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:59,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732833783] [2021-06-06 00:15:59,228 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 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 [2021-06-06 00:15:59,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:15:59,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:15:59,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:15:59,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:15:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:15:59,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732833783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:15:59,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:15:59,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:15:59,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237483541] [2021-06-06 00:15:59,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:15:59,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:15:59,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:15:59,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:15:59,351 INFO L87 Difference]: Start difference. First operand 39991 states and 155721 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:00,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:00,714 INFO L93 Difference]: Finished difference Result 60273 states and 224760 transitions. [2021-06-06 00:16:00,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-06 00:16:00,715 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:16:00,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:00,879 INFO L225 Difference]: With dead ends: 60273 [2021-06-06 00:16:00,879 INFO L226 Difference]: Without dead ends: 60273 [2021-06-06 00:16:00,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 602.9ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:16:00,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60273 states. [2021-06-06 00:16:02,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60273 to 40087. [2021-06-06 00:16:02,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40087 states, 40086 states have (on average 3.892506111859502) internal successors, (156035), 40086 states have internal predecessors, (156035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:02,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40087 states to 40087 states and 156035 transitions. [2021-06-06 00:16:02,252 INFO L78 Accepts]: Start accepts. Automaton has 40087 states and 156035 transitions. Word has length 28 [2021-06-06 00:16:02,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:02,252 INFO L482 AbstractCegarLoop]: Abstraction has 40087 states and 156035 transitions. [2021-06-06 00:16:02,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:02,252 INFO L276 IsEmpty]: Start isEmpty. Operand 40087 states and 156035 transitions. [2021-06-06 00:16:02,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:02,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:02,320 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:02,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4002 [2021-06-06 00:16:02,521 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:02,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:02,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2104435465, now seen corresponding path program 143 times [2021-06-06 00:16:02,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:02,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814514163] [2021-06-06 00:16:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:16:02,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:02,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814514163] [2021-06-06 00:16:02,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814514163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:02,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744696185] [2021-06-06 00:16:02,556 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 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 [2021-06-06 00:16:02,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:16:02,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:02,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:02,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:02,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744696185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:02,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:02,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:16:02,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759284734] [2021-06-06 00:16:02,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:16:02,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:02,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:16:02,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:16:02,683 INFO L87 Difference]: Start difference. First operand 40087 states and 156035 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:03,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:03,988 INFO L93 Difference]: Finished difference Result 59960 states and 223872 transitions. [2021-06-06 00:16:03,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:16:03,988 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:16:03,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:04,146 INFO L225 Difference]: With dead ends: 59960 [2021-06-06 00:16:04,146 INFO L226 Difference]: Without dead ends: 59952 [2021-06-06 00:16:04,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 754.9ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:16:04,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59952 states. [2021-06-06 00:16:05,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59952 to 40019. [2021-06-06 00:16:05,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40019 states, 40018 states have (on average 3.893822779749113) internal successors, (155823), 40018 states have internal predecessors, (155823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40019 states to 40019 states and 155823 transitions. [2021-06-06 00:16:05,441 INFO L78 Accepts]: Start accepts. Automaton has 40019 states and 155823 transitions. Word has length 28 [2021-06-06 00:16:05,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:05,441 INFO L482 AbstractCegarLoop]: Abstraction has 40019 states and 155823 transitions. [2021-06-06 00:16:05,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:05,441 INFO L276 IsEmpty]: Start isEmpty. Operand 40019 states and 155823 transitions. [2021-06-06 00:16:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:05,505 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:05,505 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:05,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4003,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:05,705 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:05,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:05,705 INFO L82 PathProgramCache]: Analyzing trace with hash 923074653, now seen corresponding path program 144 times [2021-06-06 00:16:05,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:05,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392758670] [2021-06-06 00:16:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:16:05,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:05,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392758670] [2021-06-06 00:16:05,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392758670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:05,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114715568] [2021-06-06 00:16:05,739 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 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 [2021-06-06 00:16:05,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:16:05,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:05,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:05,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:05,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114715568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:05,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:05,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:16:05,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769777807] [2021-06-06 00:16:05,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:16:05,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:05,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:16:05,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:16:05,847 INFO L87 Difference]: Start difference. First operand 40019 states and 155823 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:16:06,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:06,905 INFO L93 Difference]: Finished difference Result 58691 states and 220361 transitions. [2021-06-06 00:16:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:16:06,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-06 00:16:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:07,063 INFO L225 Difference]: With dead ends: 58691 [2021-06-06 00:16:07,063 INFO L226 Difference]: Without dead ends: 58667 [2021-06-06 00:16:07,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 370.4ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:16:07,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58667 states. [2021-06-06 00:16:08,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58667 to 39995. [2021-06-06 00:16:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39995 states, 39994 states have (on average 3.89395909386408) internal successors, (155735), 39994 states have internal predecessors, (155735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39995 states to 39995 states and 155735 transitions. [2021-06-06 00:16:08,457 INFO L78 Accepts]: Start accepts. Automaton has 39995 states and 155735 transitions. Word has length 28 [2021-06-06 00:16:08,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:08,457 INFO L482 AbstractCegarLoop]: Abstraction has 39995 states and 155735 transitions. [2021-06-06 00:16:08,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-06 00:16:08,457 INFO L276 IsEmpty]: Start isEmpty. Operand 39995 states and 155735 transitions. [2021-06-06 00:16:08,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:08,519 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:08,519 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:08,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4004,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:08,720 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:08,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:08,720 INFO L82 PathProgramCache]: Analyzing trace with hash 100408761, now seen corresponding path program 145 times [2021-06-06 00:16:08,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:08,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525744231] [2021-06-06 00:16:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:08,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:08,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525744231] [2021-06-06 00:16:08,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525744231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:08,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959739693] [2021-06-06 00:16:08,758 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 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 [2021-06-06 00:16:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:08,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:08,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:08,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959739693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:08,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:08,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:16:08,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38692059] [2021-06-06 00:16:08,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:16:08,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:08,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:16:08,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:16:08,854 INFO L87 Difference]: Start difference. First operand 39995 states and 155735 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:10,588 INFO L93 Difference]: Finished difference Result 61857 states and 229366 transitions. [2021-06-06 00:16:10,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-06 00:16:10,589 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:16:10,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:10,747 INFO L225 Difference]: With dead ends: 61857 [2021-06-06 00:16:10,748 INFO L226 Difference]: Without dead ends: 61857 [2021-06-06 00:16:10,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 1082.3ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-06 00:16:10,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61857 states. [2021-06-06 00:16:12,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61857 to 44335. [2021-06-06 00:16:12,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44335 states, 44334 states have (on average 3.8442053502954843) internal successors, (170429), 44334 states have internal predecessors, (170429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:12,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44335 states to 44335 states and 170429 transitions. [2021-06-06 00:16:12,280 INFO L78 Accepts]: Start accepts. Automaton has 44335 states and 170429 transitions. Word has length 28 [2021-06-06 00:16:12,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:12,280 INFO L482 AbstractCegarLoop]: Abstraction has 44335 states and 170429 transitions. [2021-06-06 00:16:12,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 44335 states and 170429 transitions. [2021-06-06 00:16:12,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:12,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:12,348 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:12,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4005,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:12,549 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:12,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:12,549 INFO L82 PathProgramCache]: Analyzing trace with hash 181784849, now seen corresponding path program 146 times [2021-06-06 00:16:12,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:12,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185521105] [2021-06-06 00:16:12,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:12,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:12,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185521105] [2021-06-06 00:16:12,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185521105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:12,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603760211] [2021-06-06 00:16:12,587 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 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 [2021-06-06 00:16:12,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:12,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:12,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:12,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:12,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603760211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:12,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:12,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:16:12,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826096920] [2021-06-06 00:16:12,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:16:12,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:12,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:16:12,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:16:12,706 INFO L87 Difference]: Start difference. First operand 44335 states and 170429 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:13,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:13,944 INFO L93 Difference]: Finished difference Result 61088 states and 227260 transitions. [2021-06-06 00:16:13,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-06 00:16:13,945 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:16:13,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:14,410 INFO L225 Difference]: With dead ends: 61088 [2021-06-06 00:16:14,410 INFO L226 Difference]: Without dead ends: 61080 [2021-06-06 00:16:14,411 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 669.7ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-06 00:16:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61080 states. [2021-06-06 00:16:15,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61080 to 43223. [2021-06-06 00:16:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43223 states, 43222 states have (on average 3.862963305723937) internal successors, (166965), 43222 states have internal predecessors, (166965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43223 states to 43223 states and 166965 transitions. [2021-06-06 00:16:15,749 INFO L78 Accepts]: Start accepts. Automaton has 43223 states and 166965 transitions. Word has length 28 [2021-06-06 00:16:15,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:15,749 INFO L482 AbstractCegarLoop]: Abstraction has 43223 states and 166965 transitions. [2021-06-06 00:16:15,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:15,749 INFO L276 IsEmpty]: Start isEmpty. Operand 43223 states and 166965 transitions. [2021-06-06 00:16:15,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:15,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:15,814 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:16,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4006,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:16,015 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:16,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:16,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1333307123, now seen corresponding path program 147 times [2021-06-06 00:16:16,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:16,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990204090] [2021-06-06 00:16:16,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:16,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:16,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990204090] [2021-06-06 00:16:16,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990204090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:16,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963264553] [2021-06-06 00:16:16,053 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 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 [2021-06-06 00:16:16,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:16:16,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:16,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:16,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:16,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963264553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:16,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:16,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:16:16,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426852518] [2021-06-06 00:16:16,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:16:16,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:16,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:16:16,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:16:16,144 INFO L87 Difference]: Start difference. First operand 43223 states and 166965 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:17,239 INFO L93 Difference]: Finished difference Result 59466 states and 222744 transitions. [2021-06-06 00:16:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:16:17,240 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:16:17,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:17,688 INFO L225 Difference]: With dead ends: 59466 [2021-06-06 00:16:17,688 INFO L226 Difference]: Without dead ends: 59442 [2021-06-06 00:16:17,688 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 583.8ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:16:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59442 states. [2021-06-06 00:16:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59442 to 43235. [2021-06-06 00:16:18,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43235 states, 43234 states have (on average 3.860827126798353) internal successors, (166919), 43234 states have internal predecessors, (166919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43235 states to 43235 states and 166919 transitions. [2021-06-06 00:16:19,052 INFO L78 Accepts]: Start accepts. Automaton has 43235 states and 166919 transitions. Word has length 28 [2021-06-06 00:16:19,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:19,052 INFO L482 AbstractCegarLoop]: Abstraction has 43235 states and 166919 transitions. [2021-06-06 00:16:19,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:19,053 INFO L276 IsEmpty]: Start isEmpty. Operand 43235 states and 166919 transitions. [2021-06-06 00:16:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:19,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:19,119 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:19,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4007,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:19,320 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:19,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:19,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1959694861, now seen corresponding path program 148 times [2021-06-06 00:16:19,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:19,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759826806] [2021-06-06 00:16:19,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:19,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:19,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759826806] [2021-06-06 00:16:19,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759826806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:19,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418542216] [2021-06-06 00:16:19,359 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 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 [2021-06-06 00:16:19,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:16:19,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:19,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:19,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:19,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418542216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:19,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:19,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:16:19,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502467066] [2021-06-06 00:16:19,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:16:19,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:19,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:16:19,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:16:19,450 INFO L87 Difference]: Start difference. First operand 43235 states and 166919 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:20,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:20,503 INFO L93 Difference]: Finished difference Result 60717 states and 226269 transitions. [2021-06-06 00:16:20,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:16:20,503 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:16:20,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:20,666 INFO L225 Difference]: With dead ends: 60717 [2021-06-06 00:16:20,667 INFO L226 Difference]: Without dead ends: 60677 [2021-06-06 00:16:20,667 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 530.1ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:16:21,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60677 states. [2021-06-06 00:16:22,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60677 to 43367. [2021-06-06 00:16:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43367 states, 43366 states have (on average 3.860143891527925) internal successors, (167399), 43366 states have internal predecessors, (167399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43367 states to 43367 states and 167399 transitions. [2021-06-06 00:16:22,358 INFO L78 Accepts]: Start accepts. Automaton has 43367 states and 167399 transitions. Word has length 28 [2021-06-06 00:16:22,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:22,358 INFO L482 AbstractCegarLoop]: Abstraction has 43367 states and 167399 transitions. [2021-06-06 00:16:22,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:22,358 INFO L276 IsEmpty]: Start isEmpty. Operand 43367 states and 167399 transitions. [2021-06-06 00:16:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:22,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:22,425 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:22,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4008,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:22,626 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:22,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:22,626 INFO L82 PathProgramCache]: Analyzing trace with hash 243917385, now seen corresponding path program 149 times [2021-06-06 00:16:22,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:22,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964375294] [2021-06-06 00:16:22,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:22,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:22,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964375294] [2021-06-06 00:16:22,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964375294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:22,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785068778] [2021-06-06 00:16:22,665 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 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 [2021-06-06 00:16:22,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:16:22,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:22,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:22,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:22,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785068778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:22,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:22,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:16:22,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269873744] [2021-06-06 00:16:22,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:22,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:22,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:22,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:22,793 INFO L87 Difference]: Start difference. First operand 43367 states and 167399 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:24,261 INFO L93 Difference]: Finished difference Result 59965 states and 224001 transitions. [2021-06-06 00:16:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-06 00:16:24,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:16:24,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:24,712 INFO L225 Difference]: With dead ends: 59965 [2021-06-06 00:16:24,712 INFO L226 Difference]: Without dead ends: 59965 [2021-06-06 00:16:24,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 855.5ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-06 00:16:24,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59965 states. [2021-06-06 00:16:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59965 to 44272. [2021-06-06 00:16:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44272 states, 44271 states have (on average 3.8506019742043325) internal successors, (170470), 44271 states have internal predecessors, (170470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:25,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44272 states to 44272 states and 170470 transitions. [2021-06-06 00:16:25,991 INFO L78 Accepts]: Start accepts. Automaton has 44272 states and 170470 transitions. Word has length 28 [2021-06-06 00:16:25,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:25,991 INFO L482 AbstractCegarLoop]: Abstraction has 44272 states and 170470 transitions. [2021-06-06 00:16:25,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:25,991 INFO L276 IsEmpty]: Start isEmpty. Operand 44272 states and 170470 transitions. [2021-06-06 00:16:26,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:26,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:26,059 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:26,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4009 [2021-06-06 00:16:26,265 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:26,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:26,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1886956539, now seen corresponding path program 150 times [2021-06-06 00:16:26,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:26,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712119975] [2021-06-06 00:16:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:26,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:26,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712119975] [2021-06-06 00:16:26,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712119975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:26,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67225810] [2021-06-06 00:16:26,304 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 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 [2021-06-06 00:16:26,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:16:26,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:26,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:26,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:26,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67225810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:26,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:26,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:16:26,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984032054] [2021-06-06 00:16:26,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:26,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:26,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:26,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:26,426 INFO L87 Difference]: Start difference. First operand 44272 states and 170470 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:27,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:27,687 INFO L93 Difference]: Finished difference Result 59467 states and 222606 transitions. [2021-06-06 00:16:27,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:16:27,687 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:16:27,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:28,242 INFO L225 Difference]: With dead ends: 59467 [2021-06-06 00:16:28,242 INFO L226 Difference]: Without dead ends: 59459 [2021-06-06 00:16:28,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 681.4ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-06 00:16:28,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59459 states. [2021-06-06 00:16:29,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59459 to 44196. [2021-06-06 00:16:29,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44196 states, 44195 states have (on average 3.85188369725082) internal successors, (170234), 44195 states have internal predecessors, (170234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44196 states to 44196 states and 170234 transitions. [2021-06-06 00:16:29,688 INFO L78 Accepts]: Start accepts. Automaton has 44196 states and 170234 transitions. Word has length 28 [2021-06-06 00:16:29,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:29,688 INFO L482 AbstractCegarLoop]: Abstraction has 44196 states and 170234 transitions. [2021-06-06 00:16:29,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 44196 states and 170234 transitions. [2021-06-06 00:16:29,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:29,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:29,755 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:29,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4010 [2021-06-06 00:16:29,955 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:29,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:29,956 INFO L82 PathProgramCache]: Analyzing trace with hash 619499361, now seen corresponding path program 151 times [2021-06-06 00:16:29,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:29,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587047013] [2021-06-06 00:16:29,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:29,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:29,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587047013] [2021-06-06 00:16:29,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587047013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:29,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798535680] [2021-06-06 00:16:29,996 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 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 [2021-06-06 00:16:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:30,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:30,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:30,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798535680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:30,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:30,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:16:30,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113639100] [2021-06-06 00:16:30,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:16:30,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:30,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:16:30,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:16:30,105 INFO L87 Difference]: Start difference. First operand 44196 states and 170234 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:31,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:31,196 INFO L93 Difference]: Finished difference Result 58944 states and 221360 transitions. [2021-06-06 00:16:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:16:31,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-06 00:16:31,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:31,350 INFO L225 Difference]: With dead ends: 58944 [2021-06-06 00:16:31,350 INFO L226 Difference]: Without dead ends: 58920 [2021-06-06 00:16:31,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 569.8ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:16:31,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58920 states. [2021-06-06 00:16:32,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58920 to 44182. [2021-06-06 00:16:32,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44182 states, 44181 states have (on average 3.8518593965731878) internal successors, (170179), 44181 states have internal predecessors, (170179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:33,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44182 states to 44182 states and 170179 transitions. [2021-06-06 00:16:33,049 INFO L78 Accepts]: Start accepts. Automaton has 44182 states and 170179 transitions. Word has length 28 [2021-06-06 00:16:33,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:33,049 INFO L482 AbstractCegarLoop]: Abstraction has 44182 states and 170179 transitions. [2021-06-06 00:16:33,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:33,049 INFO L276 IsEmpty]: Start isEmpty. Operand 44182 states and 170179 transitions. [2021-06-06 00:16:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:33,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:33,116 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:33,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4011 [2021-06-06 00:16:33,316 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:33,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:33,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085277, now seen corresponding path program 152 times [2021-06-06 00:16:33,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:33,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474548146] [2021-06-06 00:16:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:33,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:33,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474548146] [2021-06-06 00:16:33,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474548146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:33,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332535046] [2021-06-06 00:16:33,356 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 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 [2021-06-06 00:16:33,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:33,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:33,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:33,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:33,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332535046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:33,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:33,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:16:33,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684544531] [2021-06-06 00:16:33,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:16:33,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:33,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:16:33,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:16:33,456 INFO L87 Difference]: Start difference. First operand 44182 states and 170179 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:34,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:34,503 INFO L93 Difference]: Finished difference Result 58726 states and 220667 transitions. [2021-06-06 00:16:34,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:16:34,504 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:16:34,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:34,661 INFO L225 Difference]: With dead ends: 58726 [2021-06-06 00:16:34,661 INFO L226 Difference]: Without dead ends: 58686 [2021-06-06 00:16:34,661 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 529.2ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:16:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58686 states. [2021-06-06 00:16:36,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58686 to 44531. [2021-06-06 00:16:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44531 states, 44530 states have (on average 3.853761509094992) internal successors, (171608), 44530 states have internal predecessors, (171608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:36,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44531 states to 44531 states and 171608 transitions. [2021-06-06 00:16:36,453 INFO L78 Accepts]: Start accepts. Automaton has 44531 states and 171608 transitions. Word has length 28 [2021-06-06 00:16:36,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:36,453 INFO L482 AbstractCegarLoop]: Abstraction has 44531 states and 171608 transitions. [2021-06-06 00:16:36,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:36,453 INFO L276 IsEmpty]: Start isEmpty. Operand 44531 states and 171608 transitions. [2021-06-06 00:16:36,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:36,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:36,522 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:36,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4012 [2021-06-06 00:16:36,722 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:36,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:36,722 INFO L82 PathProgramCache]: Analyzing trace with hash 806750187, now seen corresponding path program 153 times [2021-06-06 00:16:36,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:36,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917071243] [2021-06-06 00:16:36,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:36,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:36,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917071243] [2021-06-06 00:16:36,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917071243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:36,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865487038] [2021-06-06 00:16:36,761 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 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 [2021-06-06 00:16:36,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:16:36,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:36,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:36,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:36,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865487038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:36,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:36,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:16:36,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837585147] [2021-06-06 00:16:36,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:16:36,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:36,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:16:36,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:16:36,880 INFO L87 Difference]: Start difference. First operand 44531 states and 171608 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:38,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:38,102 INFO L93 Difference]: Finished difference Result 71242 states and 265120 transitions. [2021-06-06 00:16:38,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:16:38,102 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:16:38,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:38,293 INFO L225 Difference]: With dead ends: 71242 [2021-06-06 00:16:38,293 INFO L226 Difference]: Without dead ends: 71242 [2021-06-06 00:16:38,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 604.8ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-06 00:16:38,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71242 states. [2021-06-06 00:16:39,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71242 to 45697. [2021-06-06 00:16:39,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45697 states, 45696 states have (on average 3.8682379201680672) internal successors, (176763), 45696 states have internal predecessors, (176763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45697 states to 45697 states and 176763 transitions. [2021-06-06 00:16:39,982 INFO L78 Accepts]: Start accepts. Automaton has 45697 states and 176763 transitions. Word has length 28 [2021-06-06 00:16:39,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:39,983 INFO L482 AbstractCegarLoop]: Abstraction has 45697 states and 176763 transitions. [2021-06-06 00:16:39,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 45697 states and 176763 transitions. [2021-06-06 00:16:40,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:40,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:40,054 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:40,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4013 [2021-06-06 00:16:40,255 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:40,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:40,255 INFO L82 PathProgramCache]: Analyzing trace with hash 132028309, now seen corresponding path program 154 times [2021-06-06 00:16:40,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:40,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45326651] [2021-06-06 00:16:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:40,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:40,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45326651] [2021-06-06 00:16:40,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45326651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:40,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728246450] [2021-06-06 00:16:40,294 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 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 [2021-06-06 00:16:40,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:16:40,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:40,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:40,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:40,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728246450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:40,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:40,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:16:40,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427950980] [2021-06-06 00:16:40,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:16:40,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:40,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:16:40,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:16:40,410 INFO L87 Difference]: Start difference. First operand 45697 states and 176763 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:41,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:41,575 INFO L93 Difference]: Finished difference Result 65327 states and 246370 transitions. [2021-06-06 00:16:41,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:16:41,575 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-06 00:16:41,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:41,746 INFO L225 Difference]: With dead ends: 65327 [2021-06-06 00:16:41,747 INFO L226 Difference]: Without dead ends: 65327 [2021-06-06 00:16:41,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 550.7ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:16:42,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65327 states. [2021-06-06 00:16:43,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65327 to 45727. [2021-06-06 00:16:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45727 states, 45726 states have (on average 3.868040064733412) internal successors, (176870), 45726 states have internal predecessors, (176870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:43,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45727 states to 45727 states and 176870 transitions. [2021-06-06 00:16:43,457 INFO L78 Accepts]: Start accepts. Automaton has 45727 states and 176870 transitions. Word has length 28 [2021-06-06 00:16:43,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:43,457 INFO L482 AbstractCegarLoop]: Abstraction has 45727 states and 176870 transitions. [2021-06-06 00:16:43,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:43,457 INFO L276 IsEmpty]: Start isEmpty. Operand 45727 states and 176870 transitions. [2021-06-06 00:16:43,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:43,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:43,524 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:43,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4014,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:43,725 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:43,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:43,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1785388485, now seen corresponding path program 155 times [2021-06-06 00:16:43,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:43,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524819078] [2021-06-06 00:16:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:43,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:43,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524819078] [2021-06-06 00:16:43,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524819078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:43,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080595788] [2021-06-06 00:16:43,770 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 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 [2021-06-06 00:16:43,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:16:43,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:43,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:43,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:43,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080595788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:43,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:43,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:16:43,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591567693] [2021-06-06 00:16:43,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:43,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:43,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:43,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:43,898 INFO L87 Difference]: Start difference. First operand 45727 states and 176870 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:45,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:45,781 INFO L93 Difference]: Finished difference Result 66185 states and 248806 transitions. [2021-06-06 00:16:45,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-06 00:16:45,782 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:16:45,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:45,976 INFO L225 Difference]: With dead ends: 66185 [2021-06-06 00:16:45,976 INFO L226 Difference]: Without dead ends: 66185 [2021-06-06 00:16:45,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 917.3ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-06 00:16:46,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66185 states. [2021-06-06 00:16:47,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66185 to 45991. [2021-06-06 00:16:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45991 states, 45990 states have (on average 3.8644922809306372) internal successors, (177728), 45990 states have internal predecessors, (177728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:47,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45991 states to 45991 states and 177728 transitions. [2021-06-06 00:16:47,341 INFO L78 Accepts]: Start accepts. Automaton has 45991 states and 177728 transitions. Word has length 28 [2021-06-06 00:16:47,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:47,341 INFO L482 AbstractCegarLoop]: Abstraction has 45991 states and 177728 transitions. [2021-06-06 00:16:47,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:47,341 INFO L276 IsEmpty]: Start isEmpty. Operand 45991 states and 177728 transitions. [2021-06-06 00:16:47,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:47,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:47,410 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:47,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4015,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:47,613 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:47,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:47,613 INFO L82 PathProgramCache]: Analyzing trace with hash -866539657, now seen corresponding path program 156 times [2021-06-06 00:16:47,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:47,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914561901] [2021-06-06 00:16:47,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:47,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:47,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914561901] [2021-06-06 00:16:47,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914561901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:47,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463185410] [2021-06-06 00:16:47,658 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 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 [2021-06-06 00:16:47,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:16:47,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:47,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:47,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:47,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463185410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:47,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:47,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:16:47,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429018675] [2021-06-06 00:16:47,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:47,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:47,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:47,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:47,781 INFO L87 Difference]: Start difference. First operand 45991 states and 177728 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:49,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:49,507 INFO L93 Difference]: Finished difference Result 65397 states and 246571 transitions. [2021-06-06 00:16:49,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:16:49,508 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:16:49,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:49,701 INFO L225 Difference]: With dead ends: 65397 [2021-06-06 00:16:49,701 INFO L226 Difference]: Without dead ends: 65393 [2021-06-06 00:16:49,701 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 731.5ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-06 00:16:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65393 states. [2021-06-06 00:16:50,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65393 to 45627. [2021-06-06 00:16:51,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45627 states, 45626 states have (on average 3.868233025029588) internal successors, (176492), 45626 states have internal predecessors, (176492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:51,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45627 states to 45627 states and 176492 transitions. [2021-06-06 00:16:51,142 INFO L78 Accepts]: Start accepts. Automaton has 45627 states and 176492 transitions. Word has length 28 [2021-06-06 00:16:51,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:51,142 INFO L482 AbstractCegarLoop]: Abstraction has 45627 states and 176492 transitions. [2021-06-06 00:16:51,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:51,142 INFO L276 IsEmpty]: Start isEmpty. Operand 45627 states and 176492 transitions. [2021-06-06 00:16:51,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:51,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:51,210 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:51,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4016,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:51,411 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:51,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:51,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1338899459, now seen corresponding path program 157 times [2021-06-06 00:16:51,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:51,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747840537] [2021-06-06 00:16:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:51,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:51,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747840537] [2021-06-06 00:16:51,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747840537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:51,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43063273] [2021-06-06 00:16:51,450 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 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 [2021-06-06 00:16:51,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:51,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:51,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:51,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43063273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:51,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:51,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:16:51,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299632491] [2021-06-06 00:16:51,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:16:51,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:51,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:16:51,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:16:51,566 INFO L87 Difference]: Start difference. First operand 45627 states and 176492 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:52,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:52,831 INFO L93 Difference]: Finished difference Result 59724 states and 226961 transitions. [2021-06-06 00:16:52,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:16:52,831 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-06 00:16:52,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:53,024 INFO L225 Difference]: With dead ends: 59724 [2021-06-06 00:16:53,024 INFO L226 Difference]: Without dead ends: 59724 [2021-06-06 00:16:53,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 480.6ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-06 00:16:53,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59724 states. [2021-06-06 00:16:54,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59724 to 45643. [2021-06-06 00:16:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45643 states, 45642 states have (on average 3.8701196266596556) internal successors, (176640), 45642 states have internal predecessors, (176640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45643 states to 45643 states and 176640 transitions. [2021-06-06 00:16:54,396 INFO L78 Accepts]: Start accepts. Automaton has 45643 states and 176640 transitions. Word has length 28 [2021-06-06 00:16:54,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:54,396 INFO L482 AbstractCegarLoop]: Abstraction has 45643 states and 176640 transitions. [2021-06-06 00:16:54,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 45643 states and 176640 transitions. [2021-06-06 00:16:54,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:54,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:54,478 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:54,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4017,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:54,679 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:54,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:54,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1775748157, now seen corresponding path program 158 times [2021-06-06 00:16:54,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:54,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643361852] [2021-06-06 00:16:54,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:54,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:54,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643361852] [2021-06-06 00:16:54,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643361852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:54,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331543306] [2021-06-06 00:16:54,719 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 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 [2021-06-06 00:16:54,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:54,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:54,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:54,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331543306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:54,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:54,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:16:54,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620989461] [2021-06-06 00:16:54,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:16:54,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:54,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:16:54,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:16:54,831 INFO L87 Difference]: Start difference. First operand 45643 states and 176640 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:55,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:55,625 INFO L93 Difference]: Finished difference Result 59038 states and 225086 transitions. [2021-06-06 00:16:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:16:55,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-06 00:16:55,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:55,791 INFO L225 Difference]: With dead ends: 59038 [2021-06-06 00:16:55,792 INFO L226 Difference]: Without dead ends: 59026 [2021-06-06 00:16:55,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 374.0ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:16:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59026 states. [2021-06-06 00:16:57,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59026 to 45577. [2021-06-06 00:16:57,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45577 states, 45576 states have (on average 3.8712699666491135) internal successors, (176437), 45576 states have internal predecessors, (176437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:16:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45577 states to 45577 states and 176437 transitions. [2021-06-06 00:16:57,275 INFO L78 Accepts]: Start accepts. Automaton has 45577 states and 176437 transitions. Word has length 28 [2021-06-06 00:16:57,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:57,275 INFO L482 AbstractCegarLoop]: Abstraction has 45577 states and 176437 transitions. [2021-06-06 00:16:57,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:57,275 INFO L276 IsEmpty]: Start isEmpty. Operand 45577 states and 176437 transitions. [2021-06-06 00:16:57,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:57,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:57,626 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:16:57,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4018,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:57,826 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:57,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:57,827 INFO L82 PathProgramCache]: Analyzing trace with hash 517999999, now seen corresponding path program 159 times [2021-06-06 00:16:57,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:57,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880681564] [2021-06-06 00:16:57,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:57,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:57,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880681564] [2021-06-06 00:16:57,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880681564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:57,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031473880] [2021-06-06 00:16:57,872 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 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 [2021-06-06 00:16:57,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:16:57,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:57,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:16:57,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:57,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:57,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031473880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:57,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:57,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:16:57,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961723457] [2021-06-06 00:16:57,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:16:57,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:57,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:16:57,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:16:57,988 INFO L87 Difference]: Start difference. First operand 45577 states and 176437 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:16:58,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:58,681 INFO L93 Difference]: Finished difference Result 50058 states and 191219 transitions. [2021-06-06 00:16:58,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:16:58,682 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-06 00:16:58,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:58,822 INFO L225 Difference]: With dead ends: 50058 [2021-06-06 00:16:58,823 INFO L226 Difference]: Without dead ends: 50058 [2021-06-06 00:16:58,823 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:16:58,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50058 states. [2021-06-06 00:16:59,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50058 to 45785. [2021-06-06 00:16:59,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45785 states, 45784 states have (on average 3.8687969596365543) internal successors, (177129), 45784 states have internal predecessors, (177129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:00,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45785 states to 45785 states and 177129 transitions. [2021-06-06 00:17:00,001 INFO L78 Accepts]: Start accepts. Automaton has 45785 states and 177129 transitions. Word has length 28 [2021-06-06 00:17:00,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:00,002 INFO L482 AbstractCegarLoop]: Abstraction has 45785 states and 177129 transitions. [2021-06-06 00:17:00,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-06 00:17:00,002 INFO L276 IsEmpty]: Start isEmpty. Operand 45785 states and 177129 transitions. [2021-06-06 00:17:00,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:17:00,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:00,077 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:17:00,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4019,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:00,277 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:00,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:00,278 INFO L82 PathProgramCache]: Analyzing trace with hash -480567967, now seen corresponding path program 160 times [2021-06-06 00:17:00,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:00,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111856176] [2021-06-06 00:17:00,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:00,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:00,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111856176] [2021-06-06 00:17:00,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111856176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:00,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944079923] [2021-06-06 00:17:00,313 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 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 [2021-06-06 00:17:00,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:17:00,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:00,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:17:00,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:00,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944079923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:00,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:00,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:17:00,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236032044] [2021-06-06 00:17:00,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:17:00,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:00,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:17:00,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:17:00,420 INFO L87 Difference]: Start difference. First operand 45785 states and 177129 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:01,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:01,277 INFO L93 Difference]: Finished difference Result 49905 states and 190821 transitions. [2021-06-06 00:17:01,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:17:01,277 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:17:01,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:01,401 INFO L225 Difference]: With dead ends: 49905 [2021-06-06 00:17:01,401 INFO L226 Difference]: Without dead ends: 49901 [2021-06-06 00:17:01,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 257.6ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:17:01,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49901 states. [2021-06-06 00:17:02,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49901 to 45725. [2021-06-06 00:17:02,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45725 states, 45724 states have (on average 3.869674569154055) internal successors, (176937), 45724 states have internal predecessors, (176937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:02,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45725 states to 45725 states and 176937 transitions. [2021-06-06 00:17:02,658 INFO L78 Accepts]: Start accepts. Automaton has 45725 states and 176937 transitions. Word has length 28 [2021-06-06 00:17:02,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:02,659 INFO L482 AbstractCegarLoop]: Abstraction has 45725 states and 176937 transitions. [2021-06-06 00:17:02,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:02,659 INFO L276 IsEmpty]: Start isEmpty. Operand 45725 states and 176937 transitions. [2021-06-06 00:17:02,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:17:02,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:02,727 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:17:02,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4020 [2021-06-06 00:17:02,927 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:02,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:02,927 INFO L82 PathProgramCache]: Analyzing trace with hash -510371023, now seen corresponding path program 80 times [2021-06-06 00:17:02,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:02,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931769397] [2021-06-06 00:17:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:02,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:02,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931769397] [2021-06-06 00:17:02,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931769397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:02,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475333371] [2021-06-06 00:17:02,966 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 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 [2021-06-06 00:17:02,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:17:02,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:02,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:17:02,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:03,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475333371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:03,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:03,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-06 00:17:03,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077193353] [2021-06-06 00:17:03,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:17:03,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:03,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:17:03,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:17:03,061 INFO L87 Difference]: Start difference. First operand 45725 states and 176937 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:03,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:03,701 INFO L93 Difference]: Finished difference Result 49960 states and 190934 transitions. [2021-06-06 00:17:03,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:17:03,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:17:03,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:03,830 INFO L225 Difference]: With dead ends: 49960 [2021-06-06 00:17:03,830 INFO L226 Difference]: Without dead ends: 49960 [2021-06-06 00:17:03,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 254.0ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:17:03,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49960 states. [2021-06-06 00:17:04,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49960 to 45829. [2021-06-06 00:17:04,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45829 states, 45828 states have (on average 3.86796281749149) internal successors, (177261), 45828 states have internal predecessors, (177261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:05,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45829 states to 45829 states and 177261 transitions. [2021-06-06 00:17:05,102 INFO L78 Accepts]: Start accepts. Automaton has 45829 states and 177261 transitions. Word has length 28 [2021-06-06 00:17:05,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:05,102 INFO L482 AbstractCegarLoop]: Abstraction has 45829 states and 177261 transitions. [2021-06-06 00:17:05,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:05,102 INFO L276 IsEmpty]: Start isEmpty. Operand 45829 states and 177261 transitions. [2021-06-06 00:17:05,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:17:05,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:05,172 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:17:05,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4021 [2021-06-06 00:17:05,373 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:05,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:05,373 INFO L82 PathProgramCache]: Analyzing trace with hash 394977929, now seen corresponding path program 81 times [2021-06-06 00:17:05,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:05,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751625789] [2021-06-06 00:17:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:17:05,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:05,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751625789] [2021-06-06 00:17:05,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751625789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:05,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600730029] [2021-06-06 00:17:05,407 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 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 [2021-06-06 00:17:05,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:17:05,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:05,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:17:05,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:17:05,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600730029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:05,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:05,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-06 00:17:05,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765532952] [2021-06-06 00:17:05,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:17:05,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:05,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:17:05,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:17:05,478 INFO L87 Difference]: Start difference. First operand 45829 states and 177261 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:06,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:06,325 INFO L93 Difference]: Finished difference Result 50055 states and 191371 transitions. [2021-06-06 00:17:06,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:17:06,325 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:17:06,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:06,463 INFO L225 Difference]: With dead ends: 50055 [2021-06-06 00:17:06,463 INFO L226 Difference]: Without dead ends: 50043 [2021-06-06 00:17:06,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:17:06,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50043 states. [2021-06-06 00:17:07,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50043 to 45961. [2021-06-06 00:17:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45961 states, 45960 states have (on average 3.866166231505657) internal successors, (177689), 45960 states have internal predecessors, (177689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45961 states to 45961 states and 177689 transitions. [2021-06-06 00:17:07,866 INFO L78 Accepts]: Start accepts. Automaton has 45961 states and 177689 transitions. Word has length 28 [2021-06-06 00:17:07,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:07,866 INFO L482 AbstractCegarLoop]: Abstraction has 45961 states and 177689 transitions. [2021-06-06 00:17:07,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:07,866 INFO L276 IsEmpty]: Start isEmpty. Operand 45961 states and 177689 transitions. [2021-06-06 00:17:07,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:17:07,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:07,974 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:17:08,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-06-06 00:17:08,189 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:08,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:08,189 INFO L82 PathProgramCache]: Analyzing trace with hash -597515635, now seen corresponding path program 82 times [2021-06-06 00:17:08,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:08,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698472248] [2021-06-06 00:17:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:08,228 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:08,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:08,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698472248] [2021-06-06 00:17:08,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698472248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:08,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39690224] [2021-06-06 00:17:08,228 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 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 [2021-06-06 00:17:08,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:17:08,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:08,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:17:08,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:08,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39690224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:08,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:08,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-06 00:17:08,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301046675] [2021-06-06 00:17:08,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:17:08,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:08,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:17:08,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:17:08,298 INFO L87 Difference]: Start difference. First operand 45961 states and 177689 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:08,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:08,799 INFO L93 Difference]: Finished difference Result 50019 states and 191287 transitions. [2021-06-06 00:17:08,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:17:08,799 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:17:08,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:08,929 INFO L225 Difference]: With dead ends: 50019 [2021-06-06 00:17:08,929 INFO L226 Difference]: Without dead ends: 49999 [2021-06-06 00:17:08,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:17:08,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49999 states. [2021-06-06 00:17:10,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49999 to 45961. [2021-06-06 00:17:10,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45961 states, 45960 states have (on average 3.8660791993037424) internal successors, (177685), 45960 states have internal predecessors, (177685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:10,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45961 states to 45961 states and 177685 transitions. [2021-06-06 00:17:10,221 INFO L78 Accepts]: Start accepts. Automaton has 45961 states and 177685 transitions. Word has length 28 [2021-06-06 00:17:10,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:10,221 INFO L482 AbstractCegarLoop]: Abstraction has 45961 states and 177685 transitions. [2021-06-06 00:17:10,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:10,221 INFO L276 IsEmpty]: Start isEmpty. Operand 45961 states and 177685 transitions. [2021-06-06 00:17:10,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:17:10,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:10,290 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:17:10,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4023 [2021-06-06 00:17:10,491 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:10,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:10,491 INFO L82 PathProgramCache]: Analyzing trace with hash 970045237, now seen corresponding path program 161 times [2021-06-06 00:17:10,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:10,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020779469] [2021-06-06 00:17:10,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:10,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:10,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020779469] [2021-06-06 00:17:10,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020779469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:10,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550263704] [2021-06-06 00:17:10,526 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 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 [2021-06-06 00:17:10,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:17:10,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:10,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:10,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:10,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550263704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:10,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:10,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:17:10,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455225168] [2021-06-06 00:17:10,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:10,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:10,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:10,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:10,613 INFO L87 Difference]: Start difference. First operand 45961 states and 177685 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:11,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:11,354 INFO L93 Difference]: Finished difference Result 50922 states and 195250 transitions. [2021-06-06 00:17:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:17:11,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:17:11,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:11,488 INFO L225 Difference]: With dead ends: 50922 [2021-06-06 00:17:11,488 INFO L226 Difference]: Without dead ends: 50909 [2021-06-06 00:17:11,488 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:17:11,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50909 states. [2021-06-06 00:17:12,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50909 to 48694. [2021-06-06 00:17:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48694 states, 48693 states have (on average 3.8747458566939805) internal successors, (188673), 48693 states have internal predecessors, (188673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:12,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48694 states to 48694 states and 188673 transitions. [2021-06-06 00:17:12,691 INFO L78 Accepts]: Start accepts. Automaton has 48694 states and 188673 transitions. Word has length 28 [2021-06-06 00:17:12,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:12,691 INFO L482 AbstractCegarLoop]: Abstraction has 48694 states and 188673 transitions. [2021-06-06 00:17:12,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:12,691 INFO L276 IsEmpty]: Start isEmpty. Operand 48694 states and 188673 transitions. [2021-06-06 00:17:12,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:17:12,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:12,763 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:17:12,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4024 [2021-06-06 00:17:12,963 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:12,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:12,964 INFO L82 PathProgramCache]: Analyzing trace with hash 287300907, now seen corresponding path program 162 times [2021-06-06 00:17:12,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:12,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478399806] [2021-06-06 00:17:12,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:12,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:12,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478399806] [2021-06-06 00:17:12,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478399806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:12,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569368085] [2021-06-06 00:17:12,998 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 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 [2021-06-06 00:17:13,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:17:13,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:13,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:13,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:13,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569368085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:13,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:13,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:17:13,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368070480] [2021-06-06 00:17:13,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:13,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:13,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:13,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:13,086 INFO L87 Difference]: Start difference. First operand 48694 states and 188673 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:13,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:13,556 INFO L93 Difference]: Finished difference Result 54270 states and 206696 transitions. [2021-06-06 00:17:13,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:17:13,557 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:17:13,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:13,699 INFO L225 Difference]: With dead ends: 54270 [2021-06-06 00:17:13,699 INFO L226 Difference]: Without dead ends: 54270 [2021-06-06 00:17:13,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:17:13,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54270 states. [2021-06-06 00:17:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54270 to 43234. [2021-06-06 00:17:14,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43234 states, 43233 states have (on average 3.86188790969861) internal successors, (166961), 43233 states have internal predecessors, (166961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43234 states to 43234 states and 166961 transitions. [2021-06-06 00:17:14,982 INFO L78 Accepts]: Start accepts. Automaton has 43234 states and 166961 transitions. Word has length 28 [2021-06-06 00:17:14,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:14,982 INFO L482 AbstractCegarLoop]: Abstraction has 43234 states and 166961 transitions. [2021-06-06 00:17:14,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:14,983 INFO L276 IsEmpty]: Start isEmpty. Operand 43234 states and 166961 transitions. [2021-06-06 00:17:15,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:17:15,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:15,046 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:17:15,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4025,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:15,247 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:15,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:15,247 INFO L82 PathProgramCache]: Analyzing trace with hash -32817557, now seen corresponding path program 163 times [2021-06-06 00:17:15,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:15,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137958665] [2021-06-06 00:17:15,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:15,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:15,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137958665] [2021-06-06 00:17:15,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137958665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:15,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652343952] [2021-06-06 00:17:15,282 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 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 [2021-06-06 00:17:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:15,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:15,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:15,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652343952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:15,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:15,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:17:15,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047810490] [2021-06-06 00:17:15,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:15,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:15,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:15,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:15,370 INFO L87 Difference]: Start difference. First operand 43234 states and 166961 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:15,797 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-06 00:17:16,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:16,229 INFO L93 Difference]: Finished difference Result 48110 states and 183380 transitions. [2021-06-06 00:17:16,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:17:16,230 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:17:16,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:16,345 INFO L225 Difference]: With dead ends: 48110 [2021-06-06 00:17:16,345 INFO L226 Difference]: Without dead ends: 48110 [2021-06-06 00:17:16,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 509.7ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:17:16,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48110 states. [2021-06-06 00:17:17,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48110 to 44067. [2021-06-06 00:17:17,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44067 states, 44066 states have (on average 3.8605500839649616) internal successors, (170119), 44066 states have internal predecessors, (170119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:17,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44067 states to 44067 states and 170119 transitions. [2021-06-06 00:17:17,462 INFO L78 Accepts]: Start accepts. Automaton has 44067 states and 170119 transitions. Word has length 28 [2021-06-06 00:17:17,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:17,462 INFO L482 AbstractCegarLoop]: Abstraction has 44067 states and 170119 transitions. [2021-06-06 00:17:17,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:17,462 INFO L276 IsEmpty]: Start isEmpty. Operand 44067 states and 170119 transitions. [2021-06-06 00:17:17,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:17:17,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:17,529 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:17:17,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4026,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:17,729 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:17,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:17,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1041987733, now seen corresponding path program 164 times [2021-06-06 00:17:17,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:17,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182256800] [2021-06-06 00:17:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:17,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:17,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182256800] [2021-06-06 00:17:17,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182256800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:17,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81688892] [2021-06-06 00:17:17,771 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 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 [2021-06-06 00:17:17,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:17:17,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:17,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:17,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:17,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81688892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:17,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:17,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:17:17,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558376967] [2021-06-06 00:17:17,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:17,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:17,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:17,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:17,854 INFO L87 Difference]: Start difference. First operand 44067 states and 170119 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:18,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:18,287 INFO L93 Difference]: Finished difference Result 45824 states and 175980 transitions. [2021-06-06 00:17:18,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:17:18,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:17:18,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:18,402 INFO L225 Difference]: With dead ends: 45824 [2021-06-06 00:17:18,402 INFO L226 Difference]: Without dead ends: 45824 [2021-06-06 00:17:18,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:17:18,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45824 states. [2021-06-06 00:17:19,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45824 to 44075. [2021-06-06 00:17:19,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44075 states, 44074 states have (on average 3.8603938830149294) internal successors, (170143), 44074 states have internal predecessors, (170143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44075 states to 44075 states and 170143 transitions. [2021-06-06 00:17:19,598 INFO L78 Accepts]: Start accepts. Automaton has 44075 states and 170143 transitions. Word has length 28 [2021-06-06 00:17:19,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:19,598 INFO L482 AbstractCegarLoop]: Abstraction has 44075 states and 170143 transitions. [2021-06-06 00:17:19,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:19,598 INFO L276 IsEmpty]: Start isEmpty. Operand 44075 states and 170143 transitions. [2021-06-06 00:17:19,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:17:19,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:19,668 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:17:19,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4027,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:19,869 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:19,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1139256197, now seen corresponding path program 165 times [2021-06-06 00:17:19,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:19,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594423636] [2021-06-06 00:17:19,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:19,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:19,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594423636] [2021-06-06 00:17:19,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594423636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:19,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307124122] [2021-06-06 00:17:19,907 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 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 [2021-06-06 00:17:19,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:17:19,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:19,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:19,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:19,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307124122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:19,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:19,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:17:19,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953032315] [2021-06-06 00:17:19,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:17:19,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:19,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:17:19,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:17:19,996 INFO L87 Difference]: Start difference. First operand 44075 states and 170143 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:20,811 INFO L93 Difference]: Finished difference Result 45544 states and 175058 transitions. [2021-06-06 00:17:20,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:17:20,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:17:20,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:20,922 INFO L225 Difference]: With dead ends: 45544 [2021-06-06 00:17:20,922 INFO L226 Difference]: Without dead ends: 45544 [2021-06-06 00:17:20,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:17:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45544 states. [2021-06-06 00:17:21,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45544 to 43969. [2021-06-06 00:17:21,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43969 states, 43968 states have (on average 3.86005731441048) internal successors, (169719), 43968 states have internal predecessors, (169719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:22,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43969 states to 43969 states and 169719 transitions. [2021-06-06 00:17:22,118 INFO L78 Accepts]: Start accepts. Automaton has 43969 states and 169719 transitions. Word has length 28 [2021-06-06 00:17:22,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:22,119 INFO L482 AbstractCegarLoop]: Abstraction has 43969 states and 169719 transitions. [2021-06-06 00:17:22,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:22,119 INFO L276 IsEmpty]: Start isEmpty. Operand 43969 states and 169719 transitions. [2021-06-06 00:17:22,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:17:22,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:22,212 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:17:22,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4028,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:22,417 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:22,417 INFO L82 PathProgramCache]: Analyzing trace with hash -993746325, now seen corresponding path program 166 times [2021-06-06 00:17:22,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:22,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012618573] [2021-06-06 00:17:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:22,753 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-06 00:17:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:23,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:23,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012618573] [2021-06-06 00:17:23,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012618573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:23,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144114803] [2021-06-06 00:17:23,004 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 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 [2021-06-06 00:17:23,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:17:23,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:23,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:17:23,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:23,369 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-06 00:17:23,580 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-06 00:17:24,093 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 97 [2021-06-06 00:17:24,308 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-06 00:17:24,491 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-06 00:17:24,673 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-06 00:17:24,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:24,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:24,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:24,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:24,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:17:24,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:24,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:24,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:24,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:24,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 16 [2021-06-06 00:17:24,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:25,239 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 112 [2021-06-06 00:17:25,239 INFO L628 ElimStorePlain]: treesize reduction 342, result has 42.4 percent of original size [2021-06-06 00:17:25,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:25,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:25,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:25,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:17:25,248 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:25,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:25,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:25,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:25,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:17:25,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:25,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:25,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:25,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:25,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:25,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:25,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:17:25,441 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:25,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:25,517 INFO L518 ElimStorePlain]: Eliminatee v_prenex_518 vanished before elimination [2021-06-06 00:17:25,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:25,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:25,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:25,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:17:25,525 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:25,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:25,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:25,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:25,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:17:25,601 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:25,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:25,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:25,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:25,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:25,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:17:25,672 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:25,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:25,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:17:25,733 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:668, output treesize:42 [2021-06-06 00:17:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:25,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144114803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:25,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:25,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:17:25,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334225692] [2021-06-06 00:17:25,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:17:25,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:25,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:17:25,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:17:25,776 INFO L87 Difference]: Start difference. First operand 43969 states and 169719 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:26,190 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2021-06-06 00:17:26,544 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2021-06-06 00:17:26,905 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-06 00:17:27,129 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 73 [2021-06-06 00:17:27,325 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2021-06-06 00:17:28,035 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 87 [2021-06-06 00:17:28,554 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2021-06-06 00:17:28,722 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-06 00:17:29,378 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 88 [2021-06-06 00:17:29,761 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 106 [2021-06-06 00:17:30,171 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 107 [2021-06-06 00:17:30,922 WARN L205 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 141 [2021-06-06 00:17:31,222 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-06-06 00:17:31,477 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-06-06 00:17:31,690 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-06-06 00:17:32,030 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2021-06-06 00:17:32,242 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-06-06 00:17:32,385 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 40 [2021-06-06 00:17:32,717 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2021-06-06 00:17:33,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:33,004 INFO L93 Difference]: Finished difference Result 53961 states and 204236 transitions. [2021-06-06 00:17:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:17:33,004 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:17:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:33,142 INFO L225 Difference]: With dead ends: 53961 [2021-06-06 00:17:33,142 INFO L226 Difference]: Without dead ends: 53886 [2021-06-06 00:17:33,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 7787.7ms TimeCoverageRelationStatistics Valid=421, Invalid=1835, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:17:33,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53886 states. [2021-06-06 00:17:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53886 to 44104. [2021-06-06 00:17:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44104 states, 44103 states have (on average 3.8592386005487156) internal successors, (170204), 44103 states have internal predecessors, (170204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44104 states to 44104 states and 170204 transitions. [2021-06-06 00:17:34,352 INFO L78 Accepts]: Start accepts. Automaton has 44104 states and 170204 transitions. Word has length 30 [2021-06-06 00:17:34,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:34,352 INFO L482 AbstractCegarLoop]: Abstraction has 44104 states and 170204 transitions. [2021-06-06 00:17:34,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:34,353 INFO L276 IsEmpty]: Start isEmpty. Operand 44104 states and 170204 transitions. [2021-06-06 00:17:34,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:17:34,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:34,421 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:17:34,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4029,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:34,621 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:34,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:34,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1272822955, now seen corresponding path program 167 times [2021-06-06 00:17:34,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:34,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272512155] [2021-06-06 00:17:34,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:34,900 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2021-06-06 00:17:35,089 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-06-06 00:17:35,279 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-06 00:17:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:35,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:35,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272512155] [2021-06-06 00:17:35,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272512155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:35,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198138172] [2021-06-06 00:17:35,522 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 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 [2021-06-06 00:17:35,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:17:35,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:35,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:17:35,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:35,896 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-06 00:17:36,140 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-06 00:17:36,753 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-06 00:17:36,988 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-06 00:17:37,652 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 117 [2021-06-06 00:17:37,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:37,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:37,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:37,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:37,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:17:37,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:37,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:37,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:37,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:37,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:17:37,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:38,183 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 111 [2021-06-06 00:17:38,183 INFO L628 ElimStorePlain]: treesize reduction 176, result has 59.1 percent of original size [2021-06-06 00:17:38,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:38,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:38,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:38,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:17:38,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:38,293 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-06 00:17:38,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:38,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:38,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:38,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:17:38,302 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:38,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:38,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:38,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:38,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:17:38,398 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:38,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:38,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:38,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:38,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:38,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:17:38,487 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:38,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:38,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:38,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:38,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:38,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:17:38,566 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:38,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:38,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:38,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:38,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:17:38,637 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:38,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:38,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 7 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:17:38,698 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 21 variables, input treesize:504, output treesize:40 [2021-06-06 00:17:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:38,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198138172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:38,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:38,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:17:38,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922950048] [2021-06-06 00:17:38,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:17:38,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:38,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:17:38,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:17:38,746 INFO L87 Difference]: Start difference. First operand 44104 states and 170204 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:39,121 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 47 [2021-06-06 00:17:39,577 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2021-06-06 00:17:39,958 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-06 00:17:40,284 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 71 [2021-06-06 00:17:40,481 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 54 [2021-06-06 00:17:41,267 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 104 [2021-06-06 00:17:42,022 WARN L205 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 79 [2021-06-06 00:17:42,204 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2021-06-06 00:17:42,390 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-06 00:17:43,115 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 111 [2021-06-06 00:17:43,612 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 109 [2021-06-06 00:17:43,760 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-06-06 00:17:44,211 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 110 [2021-06-06 00:17:44,437 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2021-06-06 00:17:44,750 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-06 00:17:45,582 WARN L205 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 143 [2021-06-06 00:17:45,899 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 40 [2021-06-06 00:17:46,106 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 45 [2021-06-06 00:17:46,327 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-06-06 00:17:46,487 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 38 [2021-06-06 00:17:46,842 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-06-06 00:17:47,183 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 36 [2021-06-06 00:17:47,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:47,453 INFO L93 Difference]: Finished difference Result 54018 states and 204458 transitions. [2021-06-06 00:17:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:17:47,453 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:17:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:47,599 INFO L225 Difference]: With dead ends: 54018 [2021-06-06 00:17:47,599 INFO L226 Difference]: Without dead ends: 53949 [2021-06-06 00:17:47,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 9724.7ms TimeCoverageRelationStatistics Valid=567, Invalid=2625, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:17:47,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53949 states. [2021-06-06 00:17:48,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53949 to 44115. [2021-06-06 00:17:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44115 states, 44114 states have (on average 3.8592510314185975) internal successors, (170247), 44114 states have internal predecessors, (170247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:48,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44115 states to 44115 states and 170247 transitions. [2021-06-06 00:17:48,716 INFO L78 Accepts]: Start accepts. Automaton has 44115 states and 170247 transitions. Word has length 30 [2021-06-06 00:17:48,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:48,717 INFO L482 AbstractCegarLoop]: Abstraction has 44115 states and 170247 transitions. [2021-06-06 00:17:48,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:48,717 INFO L276 IsEmpty]: Start isEmpty. Operand 44115 states and 170247 transitions. [2021-06-06 00:17:48,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:17:48,785 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:48,785 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:17:48,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4070 [2021-06-06 00:17:48,986 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:48,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:48,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1430715033, now seen corresponding path program 168 times [2021-06-06 00:17:48,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:48,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762341865] [2021-06-06 00:17:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:49,733 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-06 00:17:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:49,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:49,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762341865] [2021-06-06 00:17:49,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762341865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:49,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519208739] [2021-06-06 00:17:49,987 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 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 [2021-06-06 00:17:50,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:17:50,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:50,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:17:50,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:50,488 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-06 00:17:50,769 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-06-06 00:17:51,221 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-06 00:17:51,599 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-06 00:17:52,375 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-06-06 00:17:53,121 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 200 [2021-06-06 00:17:53,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-06-06 00:17:53,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:53,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:53,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:53,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-06 00:17:53,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,058 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 162 [2021-06-06 00:17:54,059 INFO L628 ElimStorePlain]: treesize reduction 503, result has 40.0 percent of original size [2021-06-06 00:17:54,059 INFO L518 ElimStorePlain]: Eliminatee A vanished before elimination [2021-06-06 00:17:54,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:17:54,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,203 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-06 00:17:54,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:54,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:17:54,217 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,332 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-06-06 00:17:54,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:54,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:17:54,343 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,449 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-06 00:17:54,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:54,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:17:54,460 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:54,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:17:54,570 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:54,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:17:54,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:17:54,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:17:54,671 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:17:54,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:17:54,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 32 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:17:54,762 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 40 variables, input treesize:939, output treesize:40 [2021-06-06 00:17:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:54,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519208739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:54,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:54,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:17:54,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669156934] [2021-06-06 00:17:54,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:17:54,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:54,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:17:54,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:17:54,822 INFO L87 Difference]: Start difference. First operand 44115 states and 170247 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:17:55,213 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-06-06 00:17:55,497 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-06-06 00:17:55,807 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 88 [2021-06-06 00:17:56,065 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2021-06-06 00:17:56,704 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 109 [2021-06-06 00:17:56,872 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-06 00:17:57,321 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 76 [2021-06-06 00:17:57,693 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 93 [2021-06-06 00:17:57,920 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2021-06-06 00:17:58,736 WARN L205 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 107 [2021-06-06 00:18:00,429 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 230 DAG size of output: 158 [2021-06-06 00:18:00,619 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-06-06 00:18:00,956 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 92 [2021-06-06 00:18:01,158 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2021-06-06 00:18:01,558 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 96 [2021-06-06 00:18:02,542 WARN L205 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 120 [2021-06-06 00:18:03,279 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 117 [2021-06-06 00:18:04,050 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 113 [2021-06-06 00:18:04,409 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2021-06-06 00:18:05,383 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 118 [2021-06-06 00:18:07,717 WARN L205 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 240 DAG size of output: 153 [2021-06-06 00:18:09,883 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 253 DAG size of output: 166 [2021-06-06 00:18:10,812 WARN L205 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 115 [2021-06-06 00:18:12,996 WARN L205 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 250 DAG size of output: 167 [2021-06-06 00:18:13,143 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2021-06-06 00:18:14,006 WARN L205 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 111 [2021-06-06 00:18:16,382 WARN L205 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 233 DAG size of output: 162 [2021-06-06 00:18:18,491 WARN L205 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 246 DAG size of output: 164 [2021-06-06 00:18:18,946 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2021-06-06 00:18:19,462 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 141 [2021-06-06 00:18:22,613 WARN L205 SmtUtils]: Spent 2.64 s on a formula simplification. DAG size of input: 243 DAG size of output: 157 [2021-06-06 00:18:25,763 WARN L205 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 256 DAG size of output: 159 [2021-06-06 00:18:26,093 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2021-06-06 00:18:26,294 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-06-06 00:18:26,659 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 143 [2021-06-06 00:18:26,841 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-06 00:18:27,227 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 145 [2021-06-06 00:18:29,834 WARN L205 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 318 DAG size of output: 214 [2021-06-06 00:18:30,536 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 107 [2021-06-06 00:18:31,309 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 118 [2021-06-06 00:18:31,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:31,654 INFO L93 Difference]: Finished difference Result 55978 states and 209840 transitions. [2021-06-06 00:18:31,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:18:31,654 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:18:31,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:31,793 INFO L225 Difference]: With dead ends: 55978 [2021-06-06 00:18:31,793 INFO L226 Difference]: Without dead ends: 55895 [2021-06-06 00:18:31,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 36136.2ms TimeCoverageRelationStatistics Valid=678, Invalid=4434, Unknown=0, NotChecked=0, Total=5112 [2021-06-06 00:18:31,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55895 states. [2021-06-06 00:18:32,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55895 to 44185. [2021-06-06 00:18:32,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44185 states, 44184 states have (on average 3.858387651638602) internal successors, (170479), 44184 states have internal predecessors, (170479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:32,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44185 states to 44185 states and 170479 transitions. [2021-06-06 00:18:32,834 INFO L78 Accepts]: Start accepts. Automaton has 44185 states and 170479 transitions. Word has length 30 [2021-06-06 00:18:32,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:32,834 INFO L482 AbstractCegarLoop]: Abstraction has 44185 states and 170479 transitions. [2021-06-06 00:18:32,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:32,834 INFO L276 IsEmpty]: Start isEmpty. Operand 44185 states and 170479 transitions. [2021-06-06 00:18:32,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:18:32,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:32,905 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:18:33,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4115,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:33,105 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:33,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:33,106 INFO L82 PathProgramCache]: Analyzing trace with hash -625667857, now seen corresponding path program 169 times [2021-06-06 00:18:33,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:33,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586656899] [2021-06-06 00:18:33,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:33,404 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-06-06 00:18:33,565 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-06 00:18:33,682 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-06-06 00:18:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:33,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:33,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586656899] [2021-06-06 00:18:33,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586656899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:33,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65115901] [2021-06-06 00:18:33,829 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 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 [2021-06-06 00:18:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:33,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:18:33,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:34,187 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-06 00:18:34,403 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-06 00:18:34,714 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-06 00:18:35,323 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-06 00:18:36,094 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 103 [2021-06-06 00:18:36,199 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_638, v_prenex_629, v_prenex_640, v_prenex_631, v_prenex_642, v_prenex_633], 6=[v_prenex_636]} [2021-06-06 00:18:36,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:18:36,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:36,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:36,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 16 [2021-06-06 00:18:36,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:36,586 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 128 [2021-06-06 00:18:36,587 INFO L628 ElimStorePlain]: treesize reduction 181, result has 64.4 percent of original size [2021-06-06 00:18:36,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:18:36,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:36,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:36,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:18:36,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:36,734 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-06 00:18:36,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:36,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:36,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:36,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:18:36,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:36,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:18:36,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:36,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:36,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-06 00:18:36,758 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:36,962 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-06-06 00:18:36,963 INFO L628 ElimStorePlain]: treesize reduction 18, result has 93.1 percent of original size [2021-06-06 00:18:36,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:36,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:18:36,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:36,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-06 00:18:36,972 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:37,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:37,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:37,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:37,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:18:37,070 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:37,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:37,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:37,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:37,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-06 00:18:37,163 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:37,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:37,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:37,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:37,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:18:37,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-06 00:18:37,247 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:37,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:37,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:37,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:37,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:18:37,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-06-06 00:18:37,323 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:37,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:37,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-06 00:18:37,390 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 24 variables, input treesize:539, output treesize:43 [2021-06-06 00:18:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:37,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65115901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:37,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:37,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:18:37,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620173974] [2021-06-06 00:18:37,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:18:37,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:37,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:18:37,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:18:37,439 INFO L87 Difference]: Start difference. First operand 44185 states and 170479 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:37,835 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2021-06-06 00:18:38,158 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 75 [2021-06-06 00:18:38,821 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 75 [2021-06-06 00:18:39,165 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 53 [2021-06-06 00:18:39,464 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 50 [2021-06-06 00:18:39,657 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2021-06-06 00:18:39,852 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-06-06 00:18:40,412 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 100 [2021-06-06 00:18:40,907 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 72 [2021-06-06 00:18:41,162 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 59 [2021-06-06 00:18:41,316 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2021-06-06 00:18:41,488 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-06 00:18:42,001 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 89 [2021-06-06 00:18:42,285 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-06-06 00:18:42,689 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 112 [2021-06-06 00:18:42,851 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 45 [2021-06-06 00:18:43,337 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 115 [2021-06-06 00:18:43,645 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-06-06 00:18:44,436 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 122 [2021-06-06 00:18:46,080 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 209 DAG size of output: 125 [2021-06-06 00:18:46,972 WARN L205 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 133 [2021-06-06 00:18:47,217 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 41 [2021-06-06 00:18:47,456 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 46 [2021-06-06 00:18:47,772 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2021-06-06 00:18:48,154 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 34 [2021-06-06 00:18:48,339 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2021-06-06 00:18:48,574 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 36 [2021-06-06 00:18:48,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:48,860 INFO L93 Difference]: Finished difference Result 53681 states and 198300 transitions. [2021-06-06 00:18:48,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:18:48,860 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:18:48,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:49,000 INFO L225 Difference]: With dead ends: 53681 [2021-06-06 00:18:49,000 INFO L226 Difference]: Without dead ends: 53591 [2021-06-06 00:18:49,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 12299.4ms TimeCoverageRelationStatistics Valid=734, Invalid=3048, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:18:49,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53591 states. [2021-06-06 00:18:49,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53591 to 44200. [2021-06-06 00:18:49,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44200 states, 44199 states have (on average 3.8580058372361368) internal successors, (170520), 44199 states have internal predecessors, (170520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44200 states to 44200 states and 170520 transitions. [2021-06-06 00:18:50,097 INFO L78 Accepts]: Start accepts. Automaton has 44200 states and 170520 transitions. Word has length 30 [2021-06-06 00:18:50,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:50,097 INFO L482 AbstractCegarLoop]: Abstraction has 44200 states and 170520 transitions. [2021-06-06 00:18:50,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:18:50,097 INFO L276 IsEmpty]: Start isEmpty. Operand 44200 states and 170520 transitions. [2021-06-06 00:18:50,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:18:50,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:50,165 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:18:50,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4203 [2021-06-06 00:18:50,365 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:50,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:50,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1938529707, now seen corresponding path program 170 times [2021-06-06 00:18:50,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:50,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39976650] [2021-06-06 00:18:50,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:50,684 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2021-06-06 00:18:50,827 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2021-06-06 00:18:50,966 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2021-06-06 00:18:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:51,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:51,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39976650] [2021-06-06 00:18:51,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39976650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:51,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146903518] [2021-06-06 00:18:51,146 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 [2021-06-06 00:18:51,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:18:51,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:51,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:18:51,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:51,575 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-06 00:18:51,810 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-06 00:18:52,450 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-06 00:18:52,622 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 131 [2021-06-06 00:18:54,134 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 376 DAG size of output: 360 [2021-06-06 00:18:54,748 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_690, v_prenex_691, v_prenex_681, v_prenex_692, v_prenex_682, v_prenex_683, v_prenex_695, v_prenex_684, v_prenex_696, v_prenex_697, v_prenex_687, v_prenex_689, v_prenex_701, v_prenex_702, A, v_prenex_703, v_prenex_706, v_prenex_707], 6=[v_prenex_685, v_prenex_698]} [2021-06-06 00:18:54,834 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-06-06 00:18:54,834 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 35 treesize of output 39 [2021-06-06 00:18:54,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:57,178 WARN L205 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 449 DAG size of output: 425 [2021-06-06 00:18:57,179 INFO L628 ElimStorePlain]: treesize reduction 416, result has 75.3 percent of original size [2021-06-06 00:18:57,273 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-06 00:18:57,274 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 35 treesize of output 55 [2021-06-06 00:18:57,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:58,973 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 422 DAG size of output: 417 [2021-06-06 00:18:58,974 INFO L628 ElimStorePlain]: treesize reduction 9, result has 99.3 percent of original size [2021-06-06 00:18:59,058 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-06 00:18:59,058 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 31 treesize of output 43 [2021-06-06 00:18:59,060 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:18:59,890 WARN L205 SmtUtils]: Spent 829.00 ms on a formula simplification that was a NOOP. DAG size: 418 [2021-06-06 00:18:59,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:18:59,978 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-06 00:18:59,979 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 26 treesize of output 44 [2021-06-06 00:18:59,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:00,853 WARN L205 SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 414 [2021-06-06 00:19:00,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:19:00,952 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-06 00:19:00,953 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 37 treesize of output 47 [2021-06-06 00:19:00,955 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:01,032 INFO L354 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2021-06-06 00:19:01,033 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 37 treesize of output 34 [2021-06-06 00:19:01,034 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:02,694 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 417 DAG size of output: 415 [2021-06-06 00:19:02,695 INFO L628 ElimStorePlain]: treesize reduction 11, result has 99.1 percent of original size [2021-06-06 00:19:02,785 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-06 00:19:02,785 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 37 treesize of output 51 [2021-06-06 00:19:02,792 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:04,493 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 419 DAG size of output: 418 [2021-06-06 00:19:04,494 INFO L628 ElimStorePlain]: treesize reduction 16, result has 98.7 percent of original size [2021-06-06 00:19:04,575 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-06 00:19:04,575 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 37 treesize of output 43 [2021-06-06 00:19:04,579 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:05,411 WARN L205 SmtUtils]: Spent 832.00 ms on a formula simplification that was a NOOP. DAG size: 415 [2021-06-06 00:19:05,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:19:05,496 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-06 00:19:05,497 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 37 treesize of output 51 [2021-06-06 00:19:05,509 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:07,146 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 420 DAG size of output: 408 [2021-06-06 00:19:07,147 INFO L628 ElimStorePlain]: treesize reduction 36, result has 97.1 percent of original size [2021-06-06 00:19:07,241 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-06 00:19:07,242 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 55 [2021-06-06 00:19:07,260 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:08,866 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 404 DAG size of output: 399 [2021-06-06 00:19:08,867 INFO L628 ElimStorePlain]: treesize reduction 9, result has 99.2 percent of original size [2021-06-06 00:19:08,947 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-06 00:19:08,947 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 43 [2021-06-06 00:19:08,951 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:09,712 WARN L205 SmtUtils]: Spent 760.00 ms on a formula simplification that was a NOOP. DAG size: 396 [2021-06-06 00:19:09,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:19:09,787 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-06-06 00:19:09,787 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 37 treesize of output 39 [2021-06-06 00:19:09,789 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:10,559 WARN L205 SmtUtils]: Spent 769.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2021-06-06 00:19:10,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:19:10,650 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-06-06 00:19:10,650 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 35 treesize of output 39 [2021-06-06 00:19:10,652 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:10,734 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-06 00:19:10,734 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 35 treesize of output 47 [2021-06-06 00:19:10,737 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:12,245 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 396 DAG size of output: 395 [2021-06-06 00:19:12,246 INFO L628 ElimStorePlain]: treesize reduction 47, result has 95.9 percent of original size [2021-06-06 00:19:12,342 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-06 00:19:12,343 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 55 [2021-06-06 00:19:12,358 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:12,442 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-06 00:19:12,442 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 37 treesize of output 55 [2021-06-06 00:19:12,451 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:13,884 WARN L205 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 404 DAG size of output: 389 [2021-06-06 00:19:13,884 INFO L628 ElimStorePlain]: treesize reduction 67, result has 94.0 percent of original size [2021-06-06 00:19:13,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:19:13,942 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 37 treesize of output 59 [2021-06-06 00:19:13,953 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:15,328 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 393 DAG size of output: 387 [2021-06-06 00:19:15,329 INFO L628 ElimStorePlain]: treesize reduction 25, result has 97.7 percent of original size [2021-06-06 00:19:15,401 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-06 00:19:15,402 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 35 treesize of output 43 [2021-06-06 00:19:15,406 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:16,082 WARN L205 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 384 [2021-06-06 00:19:16,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:19:16,161 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-06 00:19:16,161 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 35 treesize of output 51 [2021-06-06 00:19:16,174 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:17,500 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 387 DAG size of output: 377 [2021-06-06 00:19:17,501 INFO L628 ElimStorePlain]: treesize reduction 29, result has 97.2 percent of original size [2021-06-06 00:19:17,582 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-06 00:19:17,582 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 37 treesize of output 55 [2021-06-06 00:19:17,593 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:18,868 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 375 DAG size of output: 368 [2021-06-06 00:19:18,869 INFO L628 ElimStorePlain]: treesize reduction 16, result has 98.4 percent of original size [2021-06-06 00:19:18,957 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-06 00:19:18,957 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 35 treesize of output 55 [2021-06-06 00:19:18,966 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:19,004 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-06 00:19:19,004 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 35 treesize of output 1 [2021-06-06 00:19:19,004 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:20,171 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 372 DAG size of output: 361 [2021-06-06 00:19:20,172 INFO L628 ElimStorePlain]: treesize reduction 31, result has 96.8 percent of original size [2021-06-06 00:19:20,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:20,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:19:20,220 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 57 [2021-06-06 00:19:20,247 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:20,815 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2021-06-06 00:19:20,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:19:20,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:20,878 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-06 00:19:20,878 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 28 treesize of output 48 [2021-06-06 00:19:20,883 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:21,449 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2021-06-06 00:19:21,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:19:21,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 40 dim-0 vars, 20 dim-1 vars, End of recursive call: and 26 xjuncts. [2021-06-06 00:19:21,525 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 60 variables, input treesize:1689, output treesize:1117 [2021-06-06 00:19:21,872 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 42 [2021-06-06 00:19:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:21,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146903518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:21,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:21,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-06 00:19:21,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685299835] [2021-06-06 00:19:21,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:19:21,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:21,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:19:21,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:19:21,936 INFO L87 Difference]: Start difference. First operand 44200 states and 170520 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:22,531 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2021-06-06 00:19:22,896 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2021-06-06 00:19:23,509 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-06-06 00:19:23,820 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2021-06-06 00:19:24,052 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2021-06-06 00:19:24,292 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 53 [2021-06-06 00:19:24,781 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2021-06-06 00:19:25,043 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 55 [2021-06-06 00:19:25,368 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 54 [2021-06-06 00:19:26,329 WARN L205 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 142 [2021-06-06 00:19:27,134 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 75 [2021-06-06 00:19:27,387 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-06-06 00:19:28,595 WARN L205 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 132 [2021-06-06 00:19:29,016 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-06-06 00:19:29,248 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2021-06-06 00:19:30,230 WARN L205 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 138 [2021-06-06 00:19:31,830 WARN L205 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 177 DAG size of output: 145 [2021-06-06 00:19:34,328 WARN L205 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 420 DAG size of output: 397 [2021-06-06 00:19:34,584 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-06-06 00:19:35,938 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 419 DAG size of output: 211 [2021-06-06 00:19:36,227 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2021-06-06 00:19:36,466 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 42 [2021-06-06 00:19:36,717 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2021-06-06 00:19:36,979 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 43 [2021-06-06 00:19:37,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:37,386 INFO L93 Difference]: Finished difference Result 56880 states and 213210 transitions. [2021-06-06 00:19:37,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:19:37,386 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:19:37,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:37,545 INFO L225 Difference]: With dead ends: 56880 [2021-06-06 00:19:37,545 INFO L226 Difference]: Without dead ends: 56772 [2021-06-06 00:19:37,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 16742.8ms TimeCoverageRelationStatistics Valid=593, Invalid=3067, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:19:37,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56772 states. [2021-06-06 00:19:38,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56772 to 44239. [2021-06-06 00:19:38,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44239 states, 44238 states have (on average 3.857701523577015) internal successors, (170657), 44238 states have internal predecessors, (170657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:38,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44239 states to 44239 states and 170657 transitions. [2021-06-06 00:19:38,598 INFO L78 Accepts]: Start accepts. Automaton has 44239 states and 170657 transitions. Word has length 30 [2021-06-06 00:19:38,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:38,598 INFO L482 AbstractCegarLoop]: Abstraction has 44239 states and 170657 transitions. [2021-06-06 00:19:38,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:38,598 INFO L276 IsEmpty]: Start isEmpty. Operand 44239 states and 170657 transitions. [2021-06-06 00:19:38,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:19:38,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:38,672 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:38,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4232 [2021-06-06 00:19:38,872 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:38,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:38,873 INFO L82 PathProgramCache]: Analyzing trace with hash -806056025, now seen corresponding path program 171 times [2021-06-06 00:19:38,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:38,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585816692] [2021-06-06 00:19:38,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:39,224 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-06-06 00:19:39,386 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-06-06 00:19:39,566 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 81 [2021-06-06 00:19:39,780 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-06-06 00:19:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:39,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:39,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585816692] [2021-06-06 00:19:39,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585816692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:39,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335534849] [2021-06-06 00:19:39,926 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 [2021-06-06 00:19:39,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:19:39,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:39,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:19:39,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:41,609 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-06-06 00:19:41,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:41,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:41,883 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-06-06 00:19:41,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 38 [2021-06-06 00:19:41,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:41,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:41,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:41,910 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:41,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:19:41,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:41,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:41,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:41,959 INFO L354 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2021-06-06 00:19:41,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 42 [2021-06-06 00:19:41,963 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:41,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:41,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:41,990 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:41,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 25 [2021-06-06 00:19:41,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,018 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 22 [2021-06-06 00:19:42,020 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,069 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-06-06 00:19:42,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 38 [2021-06-06 00:19:42,072 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,100 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 25 [2021-06-06 00:19:42,101 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,132 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-06 00:19:42,132 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,180 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-06-06 00:19:42,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 37 [2021-06-06 00:19:42,184 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,232 INFO L354 Elim1Store]: treesize reduction 30, result has 33.3 percent of original size [2021-06-06 00:19:42,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 39 [2021-06-06 00:19:42,234 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,281 INFO L354 Elim1Store]: treesize reduction 31, result has 31.1 percent of original size [2021-06-06 00:19:42,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 38 [2021-06-06 00:19:42,283 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,312 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:19:42,313 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,339 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 22 [2021-06-06 00:19:42,340 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,370 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 25 [2021-06-06 00:19:42,372 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,399 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:19:42,400 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,458 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-06 00:19:42,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 57 [2021-06-06 00:19:42,467 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,498 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 1 [2021-06-06 00:19:42,499 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,527 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:19:42,528 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,559 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 1 [2021-06-06 00:19:42,560 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,590 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-06-06 00:19:42,591 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:19:42,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 69 [2021-06-06 00:19:42,655 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,688 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-06-06 00:19:42,688 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,717 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 25 [2021-06-06 00:19:42,718 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,747 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-06 00:19:42,747 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,778 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 1 [2021-06-06 00:19:42,779 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,809 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-06 00:19:42,809 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,839 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 1 [2021-06-06 00:19:42,840 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,887 INFO L354 Elim1Store]: treesize reduction 32, result has 28.9 percent of original size [2021-06-06 00:19:42,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 34 [2021-06-06 00:19:42,889 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,923 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:19:42,924 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,954 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 22 [2021-06-06 00:19:42,956 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:42,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:42,990 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:42,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 1 [2021-06-06 00:19:42,990 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,023 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 25 [2021-06-06 00:19:43,025 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,059 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 1 [2021-06-06 00:19:43,060 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,095 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 1 [2021-06-06 00:19:43,096 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,130 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-06 00:19:43,131 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,164 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 22 [2021-06-06 00:19:43,165 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,196 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:19:43,197 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,251 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 1 [2021-06-06 00:19:43,252 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,294 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:19:43,296 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,339 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:19:43,340 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,382 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-06 00:19:43,383 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,418 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 25 [2021-06-06 00:19:43,420 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,459 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 1 [2021-06-06 00:19:43,460 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,492 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 25 [2021-06-06 00:19:43,493 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,528 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 1 [2021-06-06 00:19:43,528 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,559 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:19:43,560 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,591 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 25 [2021-06-06 00:19:43,592 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,625 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 1 [2021-06-06 00:19:43,626 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,659 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 1 [2021-06-06 00:19:43,660 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,691 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-06 00:19:43,691 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,722 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-06 00:19:43,723 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,752 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:19:43,753 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,785 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-06 00:19:43,786 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,818 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 1 [2021-06-06 00:19:43,819 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,850 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-06 00:19:43,851 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:19:43,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 60 [2021-06-06 00:19:43,908 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,937 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 25 [2021-06-06 00:19:43,938 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,967 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 1 [2021-06-06 00:19:43,968 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:43,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:43,996 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:43,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 22 [2021-06-06 00:19:43,997 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:44,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:44,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:44,024 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:44,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 25 [2021-06-06 00:19:44,026 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:44,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:44,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:44,054 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:44,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 1 [2021-06-06 00:19:44,054 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:44,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:44,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:44,080 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:44,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 22 [2021-06-06 00:19:44,081 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:44,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:44,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:44,106 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-06 00:19:44,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 1 [2021-06-06 00:19:44,107 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:44,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:44,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:19:44,133 INFO L354 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2021-06-06 00:19:44,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 29 [2021-06-06 00:19:44,134 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-06 00:19:44,299 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-06-06 00:19:44,300 INFO L628 ElimStorePlain]: treesize reduction 230, result has 39.6 percent of original size [2021-06-06 00:19:44,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-06 00:19:44,303 INFO L247 ElimStorePlain]: Needed 65 recursive calls to eliminate 2 variables, input treesize:3969, output treesize:177 [2021-06-06 00:19:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:44,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335534849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:44,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:44,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-06 00:19:44,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391080447] [2021-06-06 00:19:44,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:19:44,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:44,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:19:44,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:19:44,470 INFO L87 Difference]: Start difference. First operand 44239 states and 170657 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:45,218 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-06-06 00:19:45,937 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2021-06-06 00:19:46,540 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 72 [2021-06-06 00:19:46,758 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-06-06 00:19:47,028 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2021-06-06 00:19:47,242 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 77 [2021-06-06 00:19:47,418 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-06-06 00:19:47,567 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-06 00:19:47,705 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-06-06 00:19:48,106 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 97 [2021-06-06 00:19:48,521 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 89 [2021-06-06 00:19:48,783 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-06-06 00:19:49,161 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 94 [2021-06-06 00:19:49,477 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 90 [2021-06-06 00:19:49,633 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-06-06 00:19:49,918 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2021-06-06 00:19:50,185 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 83 [2021-06-06 00:19:50,428 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 80 [2021-06-06 00:19:50,825 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-06-06 00:19:51,255 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2021-06-06 00:19:51,600 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-06 00:19:51,770 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-06 00:19:52,005 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2021-06-06 00:19:52,189 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-06-06 00:19:52,477 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2021-06-06 00:19:53,045 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 75 [2021-06-06 00:19:53,223 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-06-06 00:19:53,638 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2021-06-06 00:19:53,954 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2021-06-06 00:19:54,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:54,450 INFO L93 Difference]: Finished difference Result 62789 states and 233965 transitions. [2021-06-06 00:19:54,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-06 00:19:54,451 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-06 00:19:54,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:54,597 INFO L225 Difference]: With dead ends: 62789 [2021-06-06 00:19:54,597 INFO L226 Difference]: Without dead ends: 62759 [2021-06-06 00:19:54,597 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 9675.2ms TimeCoverageRelationStatistics Valid=701, Invalid=4999, Unknown=0, NotChecked=0, Total=5700 [2021-06-06 00:19:54,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62759 states. [2021-06-06 00:19:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62759 to 44280. [2021-06-06 00:19:55,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44280 states, 44279 states have (on average 3.8575622755708125) internal successors, (170809), 44279 states have internal predecessors, (170809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:55,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44280 states to 44280 states and 170809 transitions. [2021-06-06 00:19:55,639 INFO L78 Accepts]: Start accepts. Automaton has 44280 states and 170809 transitions. Word has length 30 [2021-06-06 00:19:55,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:55,639 INFO L482 AbstractCegarLoop]: Abstraction has 44280 states and 170809 transitions. [2021-06-06 00:19:55,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:19:55,639 INFO L276 IsEmpty]: Start isEmpty. Operand 44280 states and 170809 transitions. [2021-06-06 00:19:55,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-06 00:19:55,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:55,710 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:19:55,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4416,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:55,911 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:55,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:55,911 INFO L82 PathProgramCache]: Analyzing trace with hash -688283281, now seen corresponding path program 172 times [2021-06-06 00:19:55,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:55,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112684517] [2021-06-06 00:19:55,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:56,303 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-06 00:19:56,434 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-06 00:19:56,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:56,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:56,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112684517] [2021-06-06 00:19:56,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112684517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:56,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104061249] [2021-06-06 00:19:56,598 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 [2021-06-06 00:19:56,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:19:56,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:56,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:19:56,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:57,136 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-06 00:19:57,412 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-06 00:19:57,608 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 121 [2021-06-06 00:19:57,981 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-06 00:19:58,675 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-06-06 00:19:59,768 WARN L205 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 200 [2021-06-06 00:20:00,546 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 211 [2021-06-06 00:20:01,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:20:01,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:20:01,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:20:01,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:20:01,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:20:01,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:20:01,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:20:01,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:20:01,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:20:01,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-06 00:20:01,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:20:01,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:20:01,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:20:01,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:20:01,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:20:01,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:20:01,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:20:01,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:20:01,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-06 00:20:01,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. Received shutdown request... [2021-06-06 00:20:01,940 WARN L222 SmtUtils]: Removed 7 from assertion stack [2021-06-06 00:20:02,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4855,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:02,141 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-06 00:20:02,143 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-06 00:20:02,144 WARN L196 ceAbstractionStarter]: Timeout [2021-06-06 00:20:02,144 INFO L202 PluginConnector]: Adding new model min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.06 12:20:02 BasicIcfg [2021-06-06 00:20:02,144 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-06 00:20:02,145 INFO L168 Benchmark]: Toolchain (without parser) took 765266.63 ms. Allocated memory was 354.4 MB in the beginning and 15.9 GB in the end (delta: 15.5 GB). Free memory was 333.7 MB in the beginning and 12.7 GB in the end (delta: -12.4 GB). Peak memory consumption was 4.1 GB. Max. memory is 16.0 GB. [2021-06-06 00:20:02,145 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 354.4 MB. Free memory was 334.9 MB in the beginning and 334.8 MB in the end (delta: 65.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:20:02,145 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.54 ms. Allocated memory is still 354.4 MB. Free memory was 333.6 MB in the beginning and 332.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-06 00:20:02,145 INFO L168 Benchmark]: Boogie Preprocessor took 14.32 ms. Allocated memory is still 354.4 MB. Free memory was 332.2 MB in the beginning and 331.2 MB in the end (delta: 953.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-06 00:20:02,145 INFO L168 Benchmark]: RCFGBuilder took 316.57 ms. Allocated memory is still 354.4 MB. Free memory was 331.1 MB in the beginning and 318.6 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-06 00:20:02,145 INFO L168 Benchmark]: TraceAbstraction took 764908.37 ms. Allocated memory was 354.4 MB in the beginning and 15.9 GB in the end (delta: 15.5 GB). Free memory was 318.1 MB in the beginning and 12.7 GB in the end (delta: -12.4 GB). Peak memory consumption was 4.1 GB. Max. memory is 16.0 GB. [2021-06-06 00:20:02,145 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 0.12 ms. Allocated memory is still 354.4 MB. Free memory was 334.9 MB in the beginning and 334.8 MB in the end (delta: 65.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.54 ms. Allocated memory is still 354.4 MB. Free memory was 333.6 MB in the beginning and 332.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.32 ms. Allocated memory is still 354.4 MB. Free memory was 332.2 MB in the beginning and 331.2 MB in the end (delta: 953.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 316.57 ms. Allocated memory is still 354.4 MB. Free memory was 331.1 MB in the beginning and 318.6 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 764908.37 ms. Allocated memory was 354.4 MB in the beginning and 15.9 GB in the end (delta: 15.5 GB). Free memory was 318.1 MB in the beginning and 12.7 GB in the end (delta: -12.4 GB). Peak memory consumption was 4.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 280 for 739ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 764804.6ms, OverallIterations: 257, TraceHistogramMax: 3, EmptinessCheckTime: 5198.8ms, AutomataDifference: 405082.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 59.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11542 SDtfs, 74028 SDslu, 90858 SDs, 0 SdLazy, 144823 SolverSat, 13538 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 80627.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16706 GetRequests, 5409 SyntacticMatches, 237 SemanticMatches, 11060 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190226 ImplicationChecksByTransitivity, 343196.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48694occurred in iteration=246, InterpolantAutomatonStates: 9844, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 86760.3ms AutomataMinimizationTime, 256 MinimizatonAttempts, 1321606 StatesRemovedByMinimization, 256 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 783.5ms SsaConstructionTime, 2608.5ms SatisfiabilityAnalysisTime, 201555.7ms InterpolantComputationTime, 13618 NumberOfCodeBlocks, 13618 NumberOfCodeBlocksAsserted, 887 NumberOfCheckSat, 13109 ConstructedInterpolants, 190 QuantifiedInterpolants, 214542 SizeOfPredicates, 1005 NumberOfNonLiveVariables, 17203 ConjunctsInSsa, 3605 ConjunctsInUnsatCore, 509 InterpolantComputations, 3 PerfectInterpolantSequences, 1020/4368 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