/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/prod-cons3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:02:10,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:02:10,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:02:10,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:02:10,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 23:02:10,426 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:02:10,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:02:10,427 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:02:10,427 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:02:10,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:02:10,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:02:10,429 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:02:10,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:02:10,429 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:02:10,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:02:10,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:02:10,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:02:10,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:02:10,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:02:10,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:02:10,431 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:02:10,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:02:10,431 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:02:10,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:02:10,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:02:10,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:02:10,431 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:02:10,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:02:10,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:02:10,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:02:10,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:02:10,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:02:10,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:02:10,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:02:10,432 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:02:10,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:02:10,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:02:10,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:02:10,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:02:10,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:02:10,701 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:02:10,702 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:02:10,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl [2021-06-05 23:02:10,703 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl' [2021-06-05 23:02:10,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:02:10,731 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:02:10,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:02:10,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:02:10,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:02:10,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:02:10" (1/1) ... [2021-06-05 23:02:10,746 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:02:10" (1/1) ... [2021-06-05 23:02:10,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:02:10,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:02:10,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:02:10,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:02:10,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:02:10" (1/1) ... [2021-06-05 23:02:10,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:02:10" (1/1) ... [2021-06-05 23:02:10,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:02:10" (1/1) ... [2021-06-05 23:02:10,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:02:10" (1/1) ... [2021-06-05 23:02:10,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:02:10" (1/1) ... [2021-06-05 23:02:10,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:02:10" (1/1) ... [2021-06-05 23:02:10,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:02:10" (1/1) ... [2021-06-05 23:02:10,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:02:10,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:02:10,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:02:10,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:02:10,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:02:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:02:10,830 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:02:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:02:10,830 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:02:10,831 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:02:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:02:10,831 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:02:10,831 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:02:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:02:10,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:02:10,831 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 23:02:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 23:02:10,832 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 23:02:10,832 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 23:02:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 23:02:10,832 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 23:02:10,832 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 23:02:11,038 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:02:11,038 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 23:02:11,039 INFO L202 PluginConnector]: Adding new model prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:02:11 BoogieIcfgContainer [2021-06-05 23:02:11,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:02:11,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:02:11,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:02:11,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:02:11,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:02:10" (1/2) ... [2021-06-05 23:02:11,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120cb539 and model type prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:02:11, skipping insertion in model container [2021-06-05 23:02:11,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:02:11" (2/2) ... [2021-06-05 23:02:11,044 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons3.wvr.bpl [2021-06-05 23:02:11,047 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:02:11,047 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:02:11,047 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:02:11,048 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:02:11,108 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 23:02:11,120 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 23:02:11,131 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:02:11,132 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:02:11,132 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:02:11,132 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:02:11,132 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:02:11,132 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:02:11,132 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:02:11,132 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:02:11,138 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 40 transitions, 112 flow [2021-06-05 23:02:11,176 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 755 states, 753 states have (on average 3.634794156706507) internal successors, (2737), 754 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:11,178 INFO L276 IsEmpty]: Start isEmpty. Operand has 755 states, 753 states have (on average 3.634794156706507) internal successors, (2737), 754 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:11,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:02:11,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:11,189 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] [2021-06-05 23:02:11,189 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:11,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:11,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1590059923, now seen corresponding path program 1 times [2021-06-05 23:02:11,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:11,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260006301] [2021-06-05 23:02:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:11,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:11,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260006301] [2021-06-05 23:02:11,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260006301] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:02:11,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:02:11,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:02:11,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514618164] [2021-06-05 23:02:11,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:02:11,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:11,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:02:11,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:02:11,311 INFO L87 Difference]: Start difference. First operand has 755 states, 753 states have (on average 3.634794156706507) internal successors, (2737), 754 states have internal predecessors, (2737), 0 states have call successors, (0), 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 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:11,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:11,356 INFO L93 Difference]: Finished difference Result 912 states and 3051 transitions. [2021-06-05 23:02:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:02:11,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 23:02:11,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:11,372 INFO L225 Difference]: With dead ends: 912 [2021-06-05 23:02:11,372 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 23:02:11,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:02:11,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 23:02:11,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2021-06-05 23:02:11,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 3.163568773234201) internal successors, (1702), 538 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:11,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1702 transitions. [2021-06-05 23:02:11,437 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1702 transitions. Word has length 24 [2021-06-05 23:02:11,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:11,437 INFO L482 AbstractCegarLoop]: Abstraction has 539 states and 1702 transitions. [2021-06-05 23:02:11,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:11,438 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1702 transitions. [2021-06-05 23:02:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:02:11,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:11,440 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] [2021-06-05 23:02:11,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:02:11,440 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:11,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:11,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2041716967, now seen corresponding path program 2 times [2021-06-05 23:02:11,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:11,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425271510] [2021-06-05 23:02:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:11,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:11,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425271510] [2021-06-05 23:02:11,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425271510] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:02:11,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:02:11,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 23:02:11,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879143918] [2021-06-05 23:02:11,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:02:11,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:11,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:02:11,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:02:11,478 INFO L87 Difference]: Start difference. First operand 539 states and 1702 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:11,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:11,527 INFO L93 Difference]: Finished difference Result 863 states and 2726 transitions. [2021-06-05 23:02:11,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:02:11,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 23:02:11,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:11,531 INFO L225 Difference]: With dead ends: 863 [2021-06-05 23:02:11,531 INFO L226 Difference]: Without dead ends: 671 [2021-06-05 23:02:11,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:02:11,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-05 23:02:11,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2021-06-05 23:02:11,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 3.2208955223880595) internal successors, (2158), 670 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 2158 transitions. [2021-06-05 23:02:11,554 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 2158 transitions. Word has length 24 [2021-06-05 23:02:11,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:11,554 INFO L482 AbstractCegarLoop]: Abstraction has 671 states and 2158 transitions. [2021-06-05 23:02:11,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:11,554 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 2158 transitions. [2021-06-05 23:02:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:02:11,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:11,556 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:11,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 23:02:11,556 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:11,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:11,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1345429901, now seen corresponding path program 1 times [2021-06-05 23:02:11,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:11,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788573296] [2021-06-05 23:02:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:11,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:11,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788573296] [2021-06-05 23:02:11,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788573296] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:02:11,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:02:11,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:02:11,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927509250] [2021-06-05 23:02:11,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:02:11,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:11,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:02:11,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:02:11,604 INFO L87 Difference]: Start difference. First operand 671 states and 2158 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:11,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:11,613 INFO L93 Difference]: Finished difference Result 752 states and 2398 transitions. [2021-06-05 23:02:11,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:02:11,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:02:11,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:11,617 INFO L225 Difference]: With dead ends: 752 [2021-06-05 23:02:11,617 INFO L226 Difference]: Without dead ends: 752 [2021-06-05 23:02:11,617 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:02:11,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-06-05 23:02:11,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 752. [2021-06-05 23:02:11,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.193075898801598) internal successors, (2398), 751 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2398 transitions. [2021-06-05 23:02:11,635 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2398 transitions. Word has length 27 [2021-06-05 23:02:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:11,635 INFO L482 AbstractCegarLoop]: Abstraction has 752 states and 2398 transitions. [2021-06-05 23:02:11,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2398 transitions. [2021-06-05 23:02:11,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:02:11,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:11,637 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:11,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 23:02:11,637 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:11,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:11,638 INFO L82 PathProgramCache]: Analyzing trace with hash 125377968, now seen corresponding path program 1 times [2021-06-05 23:02:11,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:11,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461767161] [2021-06-05 23:02:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:11,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:02:11,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:11,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461767161] [2021-06-05 23:02:11,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461767161] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:02:11,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:02:11,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:02:11,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305799252] [2021-06-05 23:02:11,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:02:11,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:11,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:02:11,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:02:11,658 INFO L87 Difference]: Start difference. First operand 752 states and 2398 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:11,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:11,666 INFO L93 Difference]: Finished difference Result 800 states and 2514 transitions. [2021-06-05 23:02:11,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:02:11,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 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 31 [2021-06-05 23:02:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:11,670 INFO L225 Difference]: With dead ends: 800 [2021-06-05 23:02:11,670 INFO L226 Difference]: Without dead ends: 774 [2021-06-05 23:02:11,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:02:11,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-06-05 23:02:11,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 774. [2021-06-05 23:02:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.1720569210866754) internal successors, (2452), 773 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:11,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2452 transitions. [2021-06-05 23:02:11,689 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2452 transitions. Word has length 31 [2021-06-05 23:02:11,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:11,689 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2452 transitions. [2021-06-05 23:02:11,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:11,689 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2452 transitions. [2021-06-05 23:02:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:02:11,691 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:11,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:11,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 23:02:11,691 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:11,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:11,691 INFO L82 PathProgramCache]: Analyzing trace with hash -308585039, now seen corresponding path program 1 times [2021-06-05 23:02:11,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:11,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166813397] [2021-06-05 23:02:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:11,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:11,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166813397] [2021-06-05 23:02:11,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166813397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:11,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237378396] [2021-06-05 23:02:11,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:11,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 23:02:11,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:12,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:02:12,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:12,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:12,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:12,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 23:02:12,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:02:12,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:12,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:12,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:12,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-06-05 23:02:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:12,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237378396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:12,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:12,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:02:12,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086512221] [2021-06-05 23:02:12,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:02:12,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:12,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:02:12,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:02:12,322 INFO L87 Difference]: Start difference. First operand 774 states and 2452 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:12,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:12,766 INFO L93 Difference]: Finished difference Result 1455 states and 4673 transitions. [2021-06-05 23:02:12,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:02:12,766 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:02:12,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:12,771 INFO L225 Difference]: With dead ends: 1455 [2021-06-05 23:02:12,771 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 23:02:12,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 415.5ms TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:02:12,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 23:02:12,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 906. [2021-06-05 23:02:12,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.2132596685082873) internal successors, (2908), 905 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:12,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2908 transitions. [2021-06-05 23:02:12,809 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2908 transitions. Word has length 34 [2021-06-05 23:02:12,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:12,809 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 2908 transitions. [2021-06-05 23:02:12,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:12,809 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2908 transitions. [2021-06-05 23:02:12,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:02:12,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:12,811 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:13,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:13,012 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:13,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:13,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1659336041, now seen corresponding path program 2 times [2021-06-05 23:02:13,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:13,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766107838] [2021-06-05 23:02:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:13,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:13,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766107838] [2021-06-05 23:02:13,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766107838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:13,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049541488] [2021-06-05 23:02:13,041 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 [2021-06-05 23:02:13,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:02:13,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:13,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:02:13,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:02:13,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049541488] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:02:13,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 23:02:13,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-06-05 23:02:13,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872136181] [2021-06-05 23:02:13,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:02:13,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:13,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:02:13,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:02:13,159 INFO L87 Difference]: Start difference. First operand 906 states and 2908 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:13,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:13,179 INFO L93 Difference]: Finished difference Result 2380 states and 7576 transitions. [2021-06-05 23:02:13,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:02:13,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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 37 [2021-06-05 23:02:13,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:13,188 INFO L225 Difference]: With dead ends: 2380 [2021-06-05 23:02:13,188 INFO L226 Difference]: Without dead ends: 2330 [2021-06-05 23:02:13,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:02:13,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-06-05 23:02:13,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1654. [2021-06-05 23:02:13,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.327283726557774) internal successors, (5500), 1653 states have internal predecessors, (5500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5500 transitions. [2021-06-05 23:02:13,225 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5500 transitions. Word has length 37 [2021-06-05 23:02:13,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:13,226 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5500 transitions. [2021-06-05 23:02:13,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:13,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5500 transitions. [2021-06-05 23:02:13,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:02:13,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:13,231 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:13,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:13,441 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:13,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:13,441 INFO L82 PathProgramCache]: Analyzing trace with hash 480818054, now seen corresponding path program 3 times [2021-06-05 23:02:13,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:13,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996431411] [2021-06-05 23:02:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:02:13,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:13,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996431411] [2021-06-05 23:02:13,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996431411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:13,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12484949] [2021-06-05 23:02:13,472 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 [2021-06-05 23:02:13,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:02:13,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:13,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:02:13,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:02:13,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12484949] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:02:13,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 23:02:13,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-06-05 23:02:13,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517720984] [2021-06-05 23:02:13,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:02:13,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:13,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:02:13,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:02:13,553 INFO L87 Difference]: Start difference. First operand 1654 states and 5500 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:13,580 INFO L93 Difference]: Finished difference Result 4845 states and 15851 transitions. [2021-06-05 23:02:13,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:02:13,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:02:13,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:13,598 INFO L225 Difference]: With dead ends: 4845 [2021-06-05 23:02:13,599 INFO L226 Difference]: Without dead ends: 4554 [2021-06-05 23:02:13,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:02:13,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2021-06-05 23:02:13,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 3828. [2021-06-05 23:02:13,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 3.367650901489417) internal successors, (12888), 3827 states have internal predecessors, (12888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 12888 transitions. [2021-06-05 23:02:13,687 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 12888 transitions. Word has length 41 [2021-06-05 23:02:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:13,687 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 12888 transitions. [2021-06-05 23:02:13,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 12888 transitions. [2021-06-05 23:02:13,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:02:13,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:13,695 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:13,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:13,909 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:13,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:13,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1559474053, now seen corresponding path program 4 times [2021-06-05 23:02:13,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:13,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618427838] [2021-06-05 23:02:13,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:02:14,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:14,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618427838] [2021-06-05 23:02:14,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618427838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:14,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355901010] [2021-06-05 23:02:14,323 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 [2021-06-05 23:02:14,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:02:14,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:14,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:02:14,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:14,776 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:02:14,777 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 31 treesize of output 19 [2021-06-05 23:02:14,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:14,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:14,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:14,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 23:02:14,856 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:02:14,856 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 25 treesize of output 13 [2021-06-05 23:02:14,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:14,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:14,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:14,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:02:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:14,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355901010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:14,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:14,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-06-05 23:02:14,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963849106] [2021-06-05 23:02:14,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:02:14,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:14,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:02:14,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:02:14,930 INFO L87 Difference]: Start difference. First operand 3828 states and 12888 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:22,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:22,315 INFO L93 Difference]: Finished difference Result 26830 states and 89990 transitions. [2021-06-05 23:02:22,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-06-05 23:02:22,316 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:02:22,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:22,382 INFO L225 Difference]: With dead ends: 26830 [2021-06-05 23:02:22,382 INFO L226 Difference]: Without dead ends: 23098 [2021-06-05 23:02:22,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17127 ImplicationChecksByTransitivity, 5891.9ms TimeCoverageRelationStatistics Valid=5021, Invalid=37209, Unknown=0, NotChecked=0, Total=42230 [2021-06-05 23:02:22,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23098 states. [2021-06-05 23:02:22,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23098 to 4547. [2021-06-05 23:02:22,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4547 states, 4546 states have (on average 3.3515178178618568) internal successors, (15236), 4546 states have internal predecessors, (15236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4547 states to 4547 states and 15236 transitions. [2021-06-05 23:02:22,623 INFO L78 Accepts]: Start accepts. Automaton has 4547 states and 15236 transitions. Word has length 44 [2021-06-05 23:02:22,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:22,624 INFO L482 AbstractCegarLoop]: Abstraction has 4547 states and 15236 transitions. [2021-06-05 23:02:22,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:22,624 INFO L276 IsEmpty]: Start isEmpty. Operand 4547 states and 15236 transitions. [2021-06-05 23:02:22,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:02:22,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:22,632 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:22,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:22,851 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:22,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:22,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1256079791, now seen corresponding path program 5 times [2021-06-05 23:02:22,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:22,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652337828] [2021-06-05 23:02:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:23,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:23,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652337828] [2021-06-05 23:02:23,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652337828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:23,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622227684] [2021-06-05 23:02:23,204 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 [2021-06-05 23:02:23,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:02:23,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:23,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 23:02:23,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:23,545 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:02:23,546 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 31 treesize of output 19 [2021-06-05 23:02:23,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:23,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:23,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:23,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-06-05 23:02:23,678 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:02:23,679 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 25 treesize of output 13 [2021-06-05 23:02:23,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:23,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:23,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:23,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:02:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:23,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622227684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:23,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:23,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:02:23,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642030423] [2021-06-05 23:02:23,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:02:23,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:23,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:02:23,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:02:23,753 INFO L87 Difference]: Start difference. First operand 4547 states and 15236 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:27,485 INFO L93 Difference]: Finished difference Result 28401 states and 94904 transitions. [2021-06-05 23:02:27,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 23:02:27,486 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:02:27,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:27,606 INFO L225 Difference]: With dead ends: 28401 [2021-06-05 23:02:27,606 INFO L226 Difference]: Without dead ends: 27869 [2021-06-05 23:02:27,609 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4710 ImplicationChecksByTransitivity, 2613.8ms TimeCoverageRelationStatistics Valid=2046, Invalid=11760, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 23:02:27,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27869 states. [2021-06-05 23:02:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27869 to 5370. [2021-06-05 23:02:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5370 states, 5369 states have (on average 3.3402868318122554) internal successors, (17934), 5369 states have internal predecessors, (17934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:27,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5370 states to 5370 states and 17934 transitions. [2021-06-05 23:02:27,822 INFO L78 Accepts]: Start accepts. Automaton has 5370 states and 17934 transitions. Word has length 44 [2021-06-05 23:02:27,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:27,822 INFO L482 AbstractCegarLoop]: Abstraction has 5370 states and 17934 transitions. [2021-06-05 23:02:27,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:27,822 INFO L276 IsEmpty]: Start isEmpty. Operand 5370 states and 17934 transitions. [2021-06-05 23:02:27,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:02:27,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:27,832 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:28,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 23:02:28,045 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:28,045 INFO L82 PathProgramCache]: Analyzing trace with hash 748755985, now seen corresponding path program 6 times [2021-06-05 23:02:28,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:28,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086925583] [2021-06-05 23:02:28,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:28,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:28,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086925583] [2021-06-05 23:02:28,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086925583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:28,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675197648] [2021-06-05 23:02:28,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:28,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:02:28,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:28,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:02:28,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:28,649 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:02:28,650 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 29 treesize of output 17 [2021-06-05 23:02:28,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:28,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:28,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:28,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 23:02:28,807 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:02:28,807 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 25 treesize of output 13 [2021-06-05 23:02:28,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:28,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:28,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:28,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:02:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:28,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675197648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:28,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:28,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:02:28,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333649135] [2021-06-05 23:02:28,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:02:28,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:28,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:02:28,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:02:28,878 INFO L87 Difference]: Start difference. First operand 5370 states and 17934 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:32,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:32,869 INFO L93 Difference]: Finished difference Result 37756 states and 126024 transitions. [2021-06-05 23:02:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 23:02:32,869 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:02:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:32,938 INFO L225 Difference]: With dead ends: 37756 [2021-06-05 23:02:32,939 INFO L226 Difference]: Without dead ends: 36886 [2021-06-05 23:02:32,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5904 ImplicationChecksByTransitivity, 2983.6ms TimeCoverageRelationStatistics Valid=2522, Invalid=14248, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 23:02:32,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36886 states. [2021-06-05 23:02:33,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36886 to 5460. [2021-06-05 23:02:33,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5460 states, 5459 states have (on average 3.3418208463088477) internal successors, (18243), 5459 states have internal predecessors, (18243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5460 states to 5460 states and 18243 transitions. [2021-06-05 23:02:33,287 INFO L78 Accepts]: Start accepts. Automaton has 5460 states and 18243 transitions. Word has length 44 [2021-06-05 23:02:33,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:33,288 INFO L482 AbstractCegarLoop]: Abstraction has 5460 states and 18243 transitions. [2021-06-05 23:02:33,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 5460 states and 18243 transitions. [2021-06-05 23:02:33,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:02:33,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:33,299 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:33,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:33,517 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:33,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:33,518 INFO L82 PathProgramCache]: Analyzing trace with hash -169323025, now seen corresponding path program 7 times [2021-06-05 23:02:33,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:33,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644201830] [2021-06-05 23:02:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:33,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:33,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644201830] [2021-06-05 23:02:33,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644201830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:33,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962909481] [2021-06-05 23:02:33,863 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:33,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:02:33,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:34,198 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:02:34,198 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 29 treesize of output 17 [2021-06-05 23:02:34,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:34,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:34,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:34,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 23:02:34,328 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:02:34,328 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 25 treesize of output 13 [2021-06-05 23:02:34,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:34,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:34,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:34,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:02:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:34,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962909481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:34,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:34,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:02:34,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969481028] [2021-06-05 23:02:34,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:02:34,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:34,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:02:34,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:02:34,409 INFO L87 Difference]: Start difference. First operand 5460 states and 18243 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:39,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:39,314 INFO L93 Difference]: Finished difference Result 47050 states and 156994 transitions. [2021-06-05 23:02:39,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 23:02:39,314 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:02:39,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:39,397 INFO L225 Difference]: With dead ends: 47050 [2021-06-05 23:02:39,398 INFO L226 Difference]: Without dead ends: 45439 [2021-06-05 23:02:39,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7555 ImplicationChecksByTransitivity, 3716.6ms TimeCoverageRelationStatistics Valid=2979, Invalid=17327, Unknown=0, NotChecked=0, Total=20306 [2021-06-05 23:02:39,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45439 states. [2021-06-05 23:02:39,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45439 to 6441. [2021-06-05 23:02:39,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6441 states, 6440 states have (on average 3.332919254658385) internal successors, (21464), 6440 states have internal predecessors, (21464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:39,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6441 states to 6441 states and 21464 transitions. [2021-06-05 23:02:39,719 INFO L78 Accepts]: Start accepts. Automaton has 6441 states and 21464 transitions. Word has length 44 [2021-06-05 23:02:39,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:39,719 INFO L482 AbstractCegarLoop]: Abstraction has 6441 states and 21464 transitions. [2021-06-05 23:02:39,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:39,719 INFO L276 IsEmpty]: Start isEmpty. Operand 6441 states and 21464 transitions. [2021-06-05 23:02:39,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:02:39,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:39,730 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:39,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:39,945 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:39,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:39,945 INFO L82 PathProgramCache]: Analyzing trace with hash 137214661, now seen corresponding path program 8 times [2021-06-05 23:02:39,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:39,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994674097] [2021-06-05 23:02:39,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:40,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:40,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994674097] [2021-06-05 23:02:40,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994674097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:40,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499605030] [2021-06-05 23:02:40,223 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:40,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:02:40,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:40,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:02:40,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:40,584 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:02:40,584 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 31 treesize of output 19 [2021-06-05 23:02:40,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:40,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:40,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:40,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:27 [2021-06-05 23:02:40,706 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:02:40,706 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 25 treesize of output 13 [2021-06-05 23:02:40,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:40,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:40,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:40,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:02:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:40,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499605030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:40,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:40,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:02:40,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066461654] [2021-06-05 23:02:40,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:02:40,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:40,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:02:40,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:02:40,785 INFO L87 Difference]: Start difference. First operand 6441 states and 21464 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:44,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:44,605 INFO L93 Difference]: Finished difference Result 40863 states and 136185 transitions. [2021-06-05 23:02:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 23:02:44,606 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:02:44,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:44,678 INFO L225 Difference]: With dead ends: 40863 [2021-06-05 23:02:44,678 INFO L226 Difference]: Without dead ends: 40043 [2021-06-05 23:02:44,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5762 ImplicationChecksByTransitivity, 3006.1ms TimeCoverageRelationStatistics Valid=2398, Invalid=14114, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 23:02:44,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40043 states. [2021-06-05 23:02:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40043 to 6540. [2021-06-05 23:02:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6540 states, 6539 states have (on average 3.3339960238568587) internal successors, (21801), 6539 states have internal predecessors, (21801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:45,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6540 states to 6540 states and 21801 transitions. [2021-06-05 23:02:45,009 INFO L78 Accepts]: Start accepts. Automaton has 6540 states and 21801 transitions. Word has length 44 [2021-06-05 23:02:45,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:45,009 INFO L482 AbstractCegarLoop]: Abstraction has 6540 states and 21801 transitions. [2021-06-05 23:02:45,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:45,010 INFO L276 IsEmpty]: Start isEmpty. Operand 6540 states and 21801 transitions. [2021-06-05 23:02:45,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:02:45,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:45,020 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:45,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 23:02:45,237 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:45,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:45,238 INFO L82 PathProgramCache]: Analyzing trace with hash -780864349, now seen corresponding path program 9 times [2021-06-05 23:02:45,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:45,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788153538] [2021-06-05 23:02:45,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:45,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:45,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788153538] [2021-06-05 23:02:45,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788153538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:45,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696928351] [2021-06-05 23:02:45,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:45,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:02:45,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:45,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:02:45,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:45,865 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:02:45,865 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 31 treesize of output 19 [2021-06-05 23:02:45,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:45,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:45,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:45,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:32 [2021-06-05 23:02:46,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:02:46,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:46,005 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 25 treesize of output 13 [2021-06-05 23:02:46,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:46,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:46,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:46,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2021-06-05 23:02:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:46,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696928351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:46,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:46,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:02:46,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141600523] [2021-06-05 23:02:46,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:02:46,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:46,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:02:46,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:02:46,080 INFO L87 Difference]: Start difference. First operand 6540 states and 21801 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:50,868 INFO L93 Difference]: Finished difference Result 45280 states and 150579 transitions. [2021-06-05 23:02:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 23:02:50,869 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:02:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:50,947 INFO L225 Difference]: With dead ends: 45280 [2021-06-05 23:02:50,948 INFO L226 Difference]: Without dead ends: 44360 [2021-06-05 23:02:50,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7367 ImplicationChecksByTransitivity, 3857.4ms TimeCoverageRelationStatistics Valid=2906, Invalid=17116, Unknown=0, NotChecked=0, Total=20022 [2021-06-05 23:02:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44360 states. [2021-06-05 23:02:51,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44360 to 6507. [2021-06-05 23:02:51,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6507 states, 6506 states have (on average 3.334153089455887) internal successors, (21692), 6506 states have internal predecessors, (21692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6507 states to 6507 states and 21692 transitions. [2021-06-05 23:02:51,245 INFO L78 Accepts]: Start accepts. Automaton has 6507 states and 21692 transitions. Word has length 44 [2021-06-05 23:02:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:51,245 INFO L482 AbstractCegarLoop]: Abstraction has 6507 states and 21692 transitions. [2021-06-05 23:02:51,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand 6507 states and 21692 transitions. [2021-06-05 23:02:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:02:51,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:51,256 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:51,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:51,457 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:51,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:51,457 INFO L82 PathProgramCache]: Analyzing trace with hash -114430541, now seen corresponding path program 10 times [2021-06-05 23:02:51,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:51,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853155784] [2021-06-05 23:02:51,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:51,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:51,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853155784] [2021-06-05 23:02:51,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853155784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:51,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705747514] [2021-06-05 23:02:51,794 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:51,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:02:51,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:51,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:02:51,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:52,167 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:02:52,167 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 31 treesize of output 19 [2021-06-05 23:02:52,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:52,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:52,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:52,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 23:02:52,248 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:02:52,248 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 25 treesize of output 13 [2021-06-05 23:02:52,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:52,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:52,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:52,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:02:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:52,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705747514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:52,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:52,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:02:52,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180906955] [2021-06-05 23:02:52,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:02:52,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:52,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:02:52,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:02:52,328 INFO L87 Difference]: Start difference. First operand 6507 states and 21692 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:57,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:57,800 INFO L93 Difference]: Finished difference Result 40459 states and 134704 transitions. [2021-06-05 23:02:57,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-05 23:02:57,801 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:02:57,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:57,874 INFO L225 Difference]: With dead ends: 40459 [2021-06-05 23:02:57,874 INFO L226 Difference]: Without dead ends: 39249 [2021-06-05 23:02:57,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10083 ImplicationChecksByTransitivity, 4423.8ms TimeCoverageRelationStatistics Valid=3639, Invalid=22767, Unknown=0, NotChecked=0, Total=26406 [2021-06-05 23:02:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39249 states. [2021-06-05 23:02:58,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39249 to 6786. [2021-06-05 23:02:58,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6786 states, 6785 states have (on average 3.3326455416359617) internal successors, (22612), 6785 states have internal predecessors, (22612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:58,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6786 states to 6786 states and 22612 transitions. [2021-06-05 23:02:58,135 INFO L78 Accepts]: Start accepts. Automaton has 6786 states and 22612 transitions. Word has length 44 [2021-06-05 23:02:58,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:58,136 INFO L482 AbstractCegarLoop]: Abstraction has 6786 states and 22612 transitions. [2021-06-05 23:02:58,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:58,136 INFO L276 IsEmpty]: Start isEmpty. Operand 6786 states and 22612 transitions. [2021-06-05 23:02:58,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:02:58,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:58,146 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:58,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 23:02:58,361 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:58,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:58,361 INFO L82 PathProgramCache]: Analyzing trace with hash -686560397, now seen corresponding path program 11 times [2021-06-05 23:02:58,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:58,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992810568] [2021-06-05 23:02:58,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:58,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:58,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992810568] [2021-06-05 23:02:58,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992810568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:58,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350004924] [2021-06-05 23:02:58,597 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:58,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:02:58,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:58,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 23:02:58,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:58,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:02:58,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:58,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:02:58,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:02:58,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 23:02:58,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:58,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:58,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:58,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:22 [2021-06-05 23:02:59,035 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:02:59,035 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 25 treesize of output 13 [2021-06-05 23:02:59,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:59,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:59,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:59,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:02:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:59,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350004924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:59,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:59,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:02:59,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355683654] [2021-06-05 23:02:59,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:02:59,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:59,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:02:59,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:02:59,107 INFO L87 Difference]: Start difference. First operand 6786 states and 22612 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:02,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:02,420 INFO L93 Difference]: Finished difference Result 22347 states and 74432 transitions. [2021-06-05 23:03:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 23:03:02,420 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:03:02,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:02,454 INFO L225 Difference]: With dead ends: 22347 [2021-06-05 23:03:02,454 INFO L226 Difference]: Without dead ends: 22075 [2021-06-05 23:03:02,455 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 2206.0ms TimeCoverageRelationStatistics Valid=1403, Invalid=7339, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 23:03:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22075 states. [2021-06-05 23:03:02,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22075 to 6570. [2021-06-05 23:03:02,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6570 states, 6569 states have (on average 3.3344496879281476) internal successors, (21904), 6569 states have internal predecessors, (21904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 21904 transitions. [2021-06-05 23:03:02,615 INFO L78 Accepts]: Start accepts. Automaton has 6570 states and 21904 transitions. Word has length 44 [2021-06-05 23:03:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:02,615 INFO L482 AbstractCegarLoop]: Abstraction has 6570 states and 21904 transitions. [2021-06-05 23:03:02,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 6570 states and 21904 transitions. [2021-06-05 23:03:02,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:03:02,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:02,625 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:02,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 23:03:02,825 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:02,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:02,826 INFO L82 PathProgramCache]: Analyzing trace with hash 263509385, now seen corresponding path program 12 times [2021-06-05 23:03:02,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:02,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303429921] [2021-06-05 23:03:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:03,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:03,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:03,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303429921] [2021-06-05 23:03:03,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303429921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:03,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457468581] [2021-06-05 23:03:03,037 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 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 [2021-06-05 23:03:03,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:03:03,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:03,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:03:03,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:03,309 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:03,310 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 29 treesize of output 17 [2021-06-05 23:03:03,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:03,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:03,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:03,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 23:03:03,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:03,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:03,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:03:03,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 23:03:03,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:03,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:03,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:03,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2021-06-05 23:03:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:03,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457468581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:03,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:03,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:03:03,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914669024] [2021-06-05 23:03:03,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:03:03,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:03,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:03:03,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:03:03,556 INFO L87 Difference]: Start difference. First operand 6570 states and 21904 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:05,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:05,960 INFO L93 Difference]: Finished difference Result 13093 states and 43669 transitions. [2021-06-05 23:03:05,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:03:05,960 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:03:05,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:05,981 INFO L225 Difference]: With dead ends: 13093 [2021-06-05 23:03:05,981 INFO L226 Difference]: Without dead ends: 12613 [2021-06-05 23:03:05,982 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1928 ImplicationChecksByTransitivity, 1775.1ms TimeCoverageRelationStatistics Valid=1057, Invalid=6083, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 23:03:05,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12613 states. [2021-06-05 23:03:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12613 to 6722. [2021-06-05 23:03:06,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6722 states, 6721 states have (on average 3.3309031394137776) internal successors, (22387), 6721 states have internal predecessors, (22387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6722 states to 6722 states and 22387 transitions. [2021-06-05 23:03:06,096 INFO L78 Accepts]: Start accepts. Automaton has 6722 states and 22387 transitions. Word has length 44 [2021-06-05 23:03:06,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:06,096 INFO L482 AbstractCegarLoop]: Abstraction has 6722 states and 22387 transitions. [2021-06-05 23:03:06,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:06,096 INFO L276 IsEmpty]: Start isEmpty. Operand 6722 states and 22387 transitions. [2021-06-05 23:03:06,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:03:06,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:06,106 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:06,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:06,313 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:06,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:06,313 INFO L82 PathProgramCache]: Analyzing trace with hash -243814421, now seen corresponding path program 13 times [2021-06-05 23:03:06,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:06,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862734160] [2021-06-05 23:03:06,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:06,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:06,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862734160] [2021-06-05 23:03:06,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862734160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:06,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052831666] [2021-06-05 23:03:06,549 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:06,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:03:06,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:06,817 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:06,817 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 29 treesize of output 17 [2021-06-05 23:03:06,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:06,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:06,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:06,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 23:03:06,949 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:06,949 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 25 treesize of output 13 [2021-06-05 23:03:06,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:06,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:06,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:06,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:03:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:07,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052831666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:07,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:07,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:03:07,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292780110] [2021-06-05 23:03:07,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:03:07,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:07,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:03:07,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:03:07,017 INFO L87 Difference]: Start difference. First operand 6722 states and 22387 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:08,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:08,658 INFO L93 Difference]: Finished difference Result 12931 states and 43239 transitions. [2021-06-05 23:03:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:03:08,659 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:03:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:08,679 INFO L225 Difference]: With dead ends: 12931 [2021-06-05 23:03:08,679 INFO L226 Difference]: Without dead ends: 12631 [2021-06-05 23:03:08,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1259.0ms TimeCoverageRelationStatistics Valid=662, Invalid=3894, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:03:08,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12631 states. [2021-06-05 23:03:08,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12631 to 6793. [2021-06-05 23:03:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6793 states, 6792 states have (on average 3.3318610129564195) internal successors, (22630), 6792 states have internal predecessors, (22630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6793 states to 6793 states and 22630 transitions. [2021-06-05 23:03:08,790 INFO L78 Accepts]: Start accepts. Automaton has 6793 states and 22630 transitions. Word has length 44 [2021-06-05 23:03:08,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:08,791 INFO L482 AbstractCegarLoop]: Abstraction has 6793 states and 22630 transitions. [2021-06-05 23:03:08,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:08,791 INFO L276 IsEmpty]: Start isEmpty. Operand 6793 states and 22630 transitions. [2021-06-05 23:03:08,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:03:08,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:08,799 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:09,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 23:03:09,000 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:09,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:09,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1161893431, now seen corresponding path program 14 times [2021-06-05 23:03:09,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:09,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44995722] [2021-06-05 23:03:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:09,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:09,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44995722] [2021-06-05 23:03:09,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44995722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:09,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602593518] [2021-06-05 23:03:09,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:09,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:03:09,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:09,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:03:09,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:09,493 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:09,493 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 29 treesize of output 17 [2021-06-05 23:03:09,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:09,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:09,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:09,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 23:03:09,642 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:09,642 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 25 treesize of output 13 [2021-06-05 23:03:09,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:09,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:09,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:09,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:03:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:09,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602593518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:09,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:09,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:03:09,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813311312] [2021-06-05 23:03:09,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:03:09,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:09,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:03:09,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:03:09,710 INFO L87 Difference]: Start difference. First operand 6793 states and 22630 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:13,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:13,647 INFO L93 Difference]: Finished difference Result 31575 states and 105236 transitions. [2021-06-05 23:03:13,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 23:03:13,649 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:03:13,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:13,703 INFO L225 Difference]: With dead ends: 31575 [2021-06-05 23:03:13,703 INFO L226 Difference]: Without dead ends: 31013 [2021-06-05 23:03:13,703 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3604 ImplicationChecksByTransitivity, 2828.3ms TimeCoverageRelationStatistics Valid=1883, Invalid=9889, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 23:03:13,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31013 states. [2021-06-05 23:03:13,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31013 to 6874. [2021-06-05 23:03:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 6873 states have (on average 3.3262039866142876) internal successors, (22861), 6873 states have internal predecessors, (22861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 22861 transitions. [2021-06-05 23:03:13,913 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 22861 transitions. Word has length 44 [2021-06-05 23:03:13,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:13,913 INFO L482 AbstractCegarLoop]: Abstraction has 6874 states and 22861 transitions. [2021-06-05 23:03:13,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:13,913 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 22861 transitions. [2021-06-05 23:03:13,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:03:13,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:13,922 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:14,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:14,123 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:14,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:14,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1107000947, now seen corresponding path program 15 times [2021-06-05 23:03:14,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:14,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056956426] [2021-06-05 23:03:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:14,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:14,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056956426] [2021-06-05 23:03:14,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056956426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:14,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307733868] [2021-06-05 23:03:14,386 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:14,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:03:14,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:14,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:03:14,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:14,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:03:14,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:14,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 23:03:14,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:14,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:14,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:14,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:24 [2021-06-05 23:03:14,846 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:14,846 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 25 treesize of output 13 [2021-06-05 23:03:14,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:14,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:14,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:14,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:03:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:14,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307733868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:14,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:14,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:03:14,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116154844] [2021-06-05 23:03:14,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:03:14,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:14,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:03:14,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:03:14,928 INFO L87 Difference]: Start difference. First operand 6874 states and 22861 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:20,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:20,302 INFO L93 Difference]: Finished difference Result 35083 states and 116558 transitions. [2021-06-05 23:03:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 23:03:20,302 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:03:20,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:20,361 INFO L225 Difference]: With dead ends: 35083 [2021-06-05 23:03:20,362 INFO L226 Difference]: Without dead ends: 34089 [2021-06-05 23:03:20,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5891 ImplicationChecksByTransitivity, 4170.5ms TimeCoverageRelationStatistics Valid=2817, Invalid=14739, Unknown=0, NotChecked=0, Total=17556 [2021-06-05 23:03:20,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34089 states. [2021-06-05 23:03:20,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34089 to 7792. [2021-06-05 23:03:20,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7792 states, 7791 states have (on average 3.3162623539982032) internal successors, (25837), 7791 states have internal predecessors, (25837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:20,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7792 states to 7792 states and 25837 transitions. [2021-06-05 23:03:20,610 INFO L78 Accepts]: Start accepts. Automaton has 7792 states and 25837 transitions. Word has length 44 [2021-06-05 23:03:20,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:20,610 INFO L482 AbstractCegarLoop]: Abstraction has 7792 states and 25837 transitions. [2021-06-05 23:03:20,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 7792 states and 25837 transitions. [2021-06-05 23:03:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:03:20,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:20,619 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:20,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 23:03:20,821 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:20,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:20,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1435545757, now seen corresponding path program 16 times [2021-06-05 23:03:20,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:20,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610360152] [2021-06-05 23:03:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:21,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:21,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610360152] [2021-06-05 23:03:21,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610360152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:21,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103711342] [2021-06-05 23:03:21,127 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:21,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:03:21,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:21,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:03:21,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:21,492 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:21,492 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 31 treesize of output 19 [2021-06-05 23:03:21,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:21,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:21,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:21,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 23:03:21,561 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:21,561 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 25 treesize of output 13 [2021-06-05 23:03:21,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:21,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:21,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:21,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:03:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:21,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103711342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:21,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:21,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:03:21,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938153003] [2021-06-05 23:03:21,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:03:21,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:21,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:03:21,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:03:21,626 INFO L87 Difference]: Start difference. First operand 7792 states and 25837 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:27,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:27,574 INFO L93 Difference]: Finished difference Result 41800 states and 139248 transitions. [2021-06-05 23:03:27,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-06-05 23:03:27,575 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:03:27,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:27,641 INFO L225 Difference]: With dead ends: 41800 [2021-06-05 23:03:27,642 INFO L226 Difference]: Without dead ends: 37404 [2021-06-05 23:03:27,643 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12795 ImplicationChecksByTransitivity, 4550.8ms TimeCoverageRelationStatistics Valid=4443, Invalid=28137, Unknown=0, NotChecked=0, Total=32580 [2021-06-05 23:03:27,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37404 states. [2021-06-05 23:03:27,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37404 to 8391. [2021-06-05 23:03:27,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8391 states, 8390 states have (on average 3.3079856972586414) internal successors, (27754), 8390 states have internal predecessors, (27754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:27,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8391 states to 8391 states and 27754 transitions. [2021-06-05 23:03:27,912 INFO L78 Accepts]: Start accepts. Automaton has 8391 states and 27754 transitions. Word has length 44 [2021-06-05 23:03:27,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:27,912 INFO L482 AbstractCegarLoop]: Abstraction has 8391 states and 27754 transitions. [2021-06-05 23:03:27,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:27,913 INFO L276 IsEmpty]: Start isEmpty. Operand 8391 states and 27754 transitions. [2021-06-05 23:03:27,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:03:27,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:27,923 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:28,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:28,124 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:28,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:28,124 INFO L82 PathProgramCache]: Analyzing trace with hash -789276919, now seen corresponding path program 17 times [2021-06-05 23:03:28,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:28,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539174983] [2021-06-05 23:03:28,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:28,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:28,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539174983] [2021-06-05 23:03:28,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539174983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:28,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397407684] [2021-06-05 23:03:28,387 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:28,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:03:28,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:28,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 23:03:28,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:28,675 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:28,676 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 31 treesize of output 19 [2021-06-05 23:03:28,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:28,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:28,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:28,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-06-05 23:03:28,793 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:28,793 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 25 treesize of output 13 [2021-06-05 23:03:28,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:28,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:28,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:28,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:03:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:28,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397407684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:28,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:28,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:03:28,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866401309] [2021-06-05 23:03:28,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:03:28,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:28,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:03:28,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:03:28,865 INFO L87 Difference]: Start difference. First operand 8391 states and 27754 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:32,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:32,289 INFO L93 Difference]: Finished difference Result 33537 states and 111619 transitions. [2021-06-05 23:03:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 23:03:32,290 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:03:32,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:32,349 INFO L225 Difference]: With dead ends: 33537 [2021-06-05 23:03:32,349 INFO L226 Difference]: Without dead ends: 33005 [2021-06-05 23:03:32,350 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5148 ImplicationChecksByTransitivity, 2547.2ms TimeCoverageRelationStatistics Valid=2279, Invalid=12483, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 23:03:32,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33005 states. [2021-06-05 23:03:32,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33005 to 8815. [2021-06-05 23:03:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8815 states, 8814 states have (on average 3.3045155434535967) internal successors, (29126), 8814 states have internal predecessors, (29126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:32,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8815 states to 8815 states and 29126 transitions. [2021-06-05 23:03:32,646 INFO L78 Accepts]: Start accepts. Automaton has 8815 states and 29126 transitions. Word has length 44 [2021-06-05 23:03:32,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:32,646 INFO L482 AbstractCegarLoop]: Abstraction has 8815 states and 29126 transitions. [2021-06-05 23:03:32,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:32,646 INFO L276 IsEmpty]: Start isEmpty. Operand 8815 states and 29126 transitions. [2021-06-05 23:03:32,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:03:32,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:32,657 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:32,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 23:03:32,869 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:32,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:32,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1296600725, now seen corresponding path program 18 times [2021-06-05 23:03:32,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:32,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796699135] [2021-06-05 23:03:32,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:33,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:33,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796699135] [2021-06-05 23:03:33,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796699135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:33,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454117160] [2021-06-05 23:03:33,168 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:33,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:03:33,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:33,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:03:33,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:33,446 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:33,446 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 29 treesize of output 17 [2021-06-05 23:03:33,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:33,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:33,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:33,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 23:03:33,571 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:33,571 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 25 treesize of output 13 [2021-06-05 23:03:33,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:33,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:33,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:33,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:03:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:33,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454117160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:33,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:33,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:03:33,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782239953] [2021-06-05 23:03:33,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:03:33,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:33,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:03:33,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:03:33,637 INFO L87 Difference]: Start difference. First operand 8815 states and 29126 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:37,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:37,856 INFO L93 Difference]: Finished difference Result 42883 states and 142841 transitions. [2021-06-05 23:03:37,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 23:03:37,857 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:03:37,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:37,934 INFO L225 Difference]: With dead ends: 42883 [2021-06-05 23:03:37,934 INFO L226 Difference]: Without dead ends: 41993 [2021-06-05 23:03:37,935 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6774 ImplicationChecksByTransitivity, 3307.7ms TimeCoverageRelationStatistics Valid=2912, Invalid=15994, Unknown=0, NotChecked=0, Total=18906 [2021-06-05 23:03:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41993 states. [2021-06-05 23:03:38,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41993 to 8932. [2021-06-05 23:03:38,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8932 states, 8931 states have (on average 3.3055648863509126) internal successors, (29522), 8931 states have internal predecessors, (29522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:38,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8932 states to 8932 states and 29522 transitions. [2021-06-05 23:03:38,226 INFO L78 Accepts]: Start accepts. Automaton has 8932 states and 29522 transitions. Word has length 44 [2021-06-05 23:03:38,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:38,226 INFO L482 AbstractCegarLoop]: Abstraction has 8932 states and 29522 transitions. [2021-06-05 23:03:38,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 8932 states and 29522 transitions. [2021-06-05 23:03:38,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:03:38,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:38,238 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:38,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 23:03:38,449 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:38,449 INFO L82 PathProgramCache]: Analyzing trace with hash 2080287561, now seen corresponding path program 19 times [2021-06-05 23:03:38,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:38,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803018115] [2021-06-05 23:03:38,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:38,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:38,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:38,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803018115] [2021-06-05 23:03:38,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803018115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:38,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105487850] [2021-06-05 23:03:38,732 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:38,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:03:38,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:39,025 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:39,025 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 29 treesize of output 17 [2021-06-05 23:03:39,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:39,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:39,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:39,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 23:03:39,148 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:39,148 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 25 treesize of output 13 [2021-06-05 23:03:39,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:39,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:39,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:39,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:03:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:39,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105487850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:39,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:39,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:03:39,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312469457] [2021-06-05 23:03:39,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:03:39,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:39,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:03:39,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:03:39,222 INFO L87 Difference]: Start difference. First operand 8932 states and 29522 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:44,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:44,534 INFO L93 Difference]: Finished difference Result 48973 states and 162757 transitions. [2021-06-05 23:03:44,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-06-05 23:03:44,534 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:03:44,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:44,620 INFO L225 Difference]: With dead ends: 48973 [2021-06-05 23:03:44,620 INFO L226 Difference]: Without dead ends: 47923 [2021-06-05 23:03:44,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8907 ImplicationChecksByTransitivity, 4099.0ms TimeCoverageRelationStatistics Valid=3456, Invalid=20414, Unknown=0, NotChecked=0, Total=23870 [2021-06-05 23:03:44,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47923 states. [2021-06-05 23:03:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47923 to 9050. [2021-06-05 23:03:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9050 states, 9049 states have (on average 3.305448115813902) internal successors, (29911), 9049 states have internal predecessors, (29911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:45,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9050 states to 9050 states and 29911 transitions. [2021-06-05 23:03:45,062 INFO L78 Accepts]: Start accepts. Automaton has 9050 states and 29911 transitions. Word has length 44 [2021-06-05 23:03:45,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:45,063 INFO L482 AbstractCegarLoop]: Abstraction has 9050 states and 29911 transitions. [2021-06-05 23:03:45,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:45,063 INFO L276 IsEmpty]: Start isEmpty. Operand 9050 states and 29911 transitions. [2021-06-05 23:03:45,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:03:45,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:45,074 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:45,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:45,293 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:45,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1908142049, now seen corresponding path program 20 times [2021-06-05 23:03:45,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:45,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323473069] [2021-06-05 23:03:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:45,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:45,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323473069] [2021-06-05 23:03:45,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323473069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:45,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257669947] [2021-06-05 23:03:45,586 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:45,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:03:45,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:45,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:03:45,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:45,900 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:45,900 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 31 treesize of output 19 [2021-06-05 23:03:45,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:45,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:45,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:45,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:27 [2021-06-05 23:03:46,001 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:46,001 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 25 treesize of output 13 [2021-06-05 23:03:46,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:46,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:46,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:46,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:03:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:46,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257669947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:46,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:46,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:03:46,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553621796] [2021-06-05 23:03:46,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:03:46,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:46,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:03:46,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:03:46,073 INFO L87 Difference]: Start difference. First operand 9050 states and 29911 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:50,437 INFO L93 Difference]: Finished difference Result 45204 states and 150223 transitions. [2021-06-05 23:03:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 23:03:50,437 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:03:50,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:50,518 INFO L225 Difference]: With dead ends: 45204 [2021-06-05 23:03:50,518 INFO L226 Difference]: Without dead ends: 44384 [2021-06-05 23:03:50,520 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6509 ImplicationChecksByTransitivity, 3197.2ms TimeCoverageRelationStatistics Valid=2750, Invalid=15610, Unknown=0, NotChecked=0, Total=18360 [2021-06-05 23:03:50,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44384 states. [2021-06-05 23:03:50,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44384 to 9149. [2021-06-05 23:03:50,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9149 states, 9148 states have (on average 3.3065150852645386) internal successors, (30248), 9148 states have internal predecessors, (30248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9149 states to 9149 states and 30248 transitions. [2021-06-05 23:03:50,845 INFO L78 Accepts]: Start accepts. Automaton has 9149 states and 30248 transitions. Word has length 44 [2021-06-05 23:03:50,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:50,845 INFO L482 AbstractCegarLoop]: Abstraction has 9149 states and 30248 transitions. [2021-06-05 23:03:50,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:50,845 INFO L276 IsEmpty]: Start isEmpty. Operand 9149 states and 30248 transitions. [2021-06-05 23:03:50,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:03:50,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:50,856 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:51,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 23:03:51,058 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:51,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:51,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1468746237, now seen corresponding path program 21 times [2021-06-05 23:03:51,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:51,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237737978] [2021-06-05 23:03:51,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:51,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:51,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237737978] [2021-06-05 23:03:51,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237737978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:51,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884042833] [2021-06-05 23:03:51,358 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:51,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:03:51,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:51,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:03:51,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:51,667 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:51,667 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 31 treesize of output 19 [2021-06-05 23:03:51,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:51,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:51,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:51,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:32 [2021-06-05 23:03:51,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:51,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:03:51,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:03:51,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 23:03:51,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:51,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:51,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:51,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2021-06-05 23:03:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:51,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884042833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:51,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:51,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:03:51,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316627195] [2021-06-05 23:03:51,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:03:51,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:51,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:03:51,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:03:51,858 INFO L87 Difference]: Start difference. First operand 9149 states and 30248 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:57,199 INFO L93 Difference]: Finished difference Result 49923 states and 165734 transitions. [2021-06-05 23:03:57,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-06-05 23:03:57,199 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:03:57,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:57,287 INFO L225 Difference]: With dead ends: 49923 [2021-06-05 23:03:57,287 INFO L226 Difference]: Without dead ends: 49003 [2021-06-05 23:03:57,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8692 ImplicationChecksByTransitivity, 4220.2ms TimeCoverageRelationStatistics Valid=3371, Invalid=20191, Unknown=0, NotChecked=0, Total=23562 [2021-06-05 23:03:57,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49003 states. [2021-06-05 23:03:57,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49003 to 9032. [2021-06-05 23:03:57,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9032 states, 9031 states have (on average 3.3043959694386005) internal successors, (29842), 9031 states have internal predecessors, (29842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:57,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9032 states to 9032 states and 29842 transitions. [2021-06-05 23:03:57,613 INFO L78 Accepts]: Start accepts. Automaton has 9032 states and 29842 transitions. Word has length 44 [2021-06-05 23:03:57,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:57,613 INFO L482 AbstractCegarLoop]: Abstraction has 9032 states and 29842 transitions. [2021-06-05 23:03:57,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:57,614 INFO L276 IsEmpty]: Start isEmpty. Operand 9032 states and 29842 transitions. [2021-06-05 23:03:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:03:57,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:57,624 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:57,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:57,825 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:57,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:57,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2135180045, now seen corresponding path program 22 times [2021-06-05 23:03:57,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:57,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825155958] [2021-06-05 23:03:57,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:58,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:58,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825155958] [2021-06-05 23:03:58,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825155958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:58,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227994678] [2021-06-05 23:03:58,116 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:58,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:03:58,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:58,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:03:58,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:58,450 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:58,450 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 31 treesize of output 19 [2021-06-05 23:03:58,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:58,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:58,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:58,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 23:03:58,518 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:03:58,518 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 25 treesize of output 13 [2021-06-05 23:03:58,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:58,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:58,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:58,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:03:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:58,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227994678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:58,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:58,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:03:58,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841210980] [2021-06-05 23:03:58,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:03:58,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:58,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:03:58,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:03:58,582 INFO L87 Difference]: Start difference. First operand 9032 states and 29842 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:04,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:04,643 INFO L93 Difference]: Finished difference Result 45046 states and 149636 transitions. [2021-06-05 23:04:04,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-06-05 23:04:04,643 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:04:04,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:04,720 INFO L225 Difference]: With dead ends: 45046 [2021-06-05 23:04:04,720 INFO L226 Difference]: Without dead ends: 43836 [2021-06-05 23:04:04,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10989 ImplicationChecksByTransitivity, 4511.8ms TimeCoverageRelationStatistics Valid=3874, Invalid=24856, Unknown=0, NotChecked=0, Total=28730 [2021-06-05 23:04:04,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43836 states. [2021-06-05 23:04:05,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43836 to 8973. [2021-06-05 23:04:05,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8973 states, 8972 states have (on average 3.3012706197057513) internal successors, (29619), 8972 states have internal predecessors, (29619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:05,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8973 states to 8973 states and 29619 transitions. [2021-06-05 23:04:05,045 INFO L78 Accepts]: Start accepts. Automaton has 8973 states and 29619 transitions. Word has length 44 [2021-06-05 23:04:05,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:05,045 INFO L482 AbstractCegarLoop]: Abstraction has 8973 states and 29619 transitions. [2021-06-05 23:04:05,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:05,046 INFO L276 IsEmpty]: Start isEmpty. Operand 8973 states and 29619 transitions. [2021-06-05 23:04:05,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:04:05,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:05,056 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:05,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:05,257 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:05,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:05,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1563050189, now seen corresponding path program 23 times [2021-06-05 23:04:05,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:05,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69274911] [2021-06-05 23:04:05,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:05,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:05,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69274911] [2021-06-05 23:04:05,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69274911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:05,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392368011] [2021-06-05 23:04:05,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:05,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:04:05,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:05,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 23:04:05,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:05,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:04:05,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:04:05,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:04:05,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:04:05,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 19 [2021-06-05 23:04:05,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:05,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:05,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:05,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:22 [2021-06-05 23:04:05,972 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:04:05,973 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 25 treesize of output 13 [2021-06-05 23:04:05,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:05,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:05,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:05,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:04:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:06,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392368011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:06,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:06,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:04:06,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158198507] [2021-06-05 23:04:06,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:04:06,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:06,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:04:06,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:04:06,080 INFO L87 Difference]: Start difference. First operand 8973 states and 29619 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:09,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:09,187 INFO L93 Difference]: Finished difference Result 23013 states and 76366 transitions. [2021-06-05 23:04:09,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:04:09,187 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:04:09,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:09,224 INFO L225 Difference]: With dead ends: 23013 [2021-06-05 23:04:09,224 INFO L226 Difference]: Without dead ends: 22741 [2021-06-05 23:04:09,225 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 2058.8ms TimeCoverageRelationStatistics Valid=1189, Invalid=6121, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 23:04:09,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22741 states. [2021-06-05 23:04:09,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22741 to 8595. [2021-06-05 23:04:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8595 states, 8594 states have (on average 3.3031184547358623) internal successors, (28387), 8594 states have internal predecessors, (28387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8595 states to 8595 states and 28387 transitions. [2021-06-05 23:04:09,436 INFO L78 Accepts]: Start accepts. Automaton has 8595 states and 28387 transitions. Word has length 44 [2021-06-05 23:04:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:09,436 INFO L482 AbstractCegarLoop]: Abstraction has 8595 states and 28387 transitions. [2021-06-05 23:04:09,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:09,436 INFO L276 IsEmpty]: Start isEmpty. Operand 8595 states and 28387 transitions. [2021-06-05 23:04:09,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:04:09,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:09,447 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:09,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 23:04:09,647 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:09,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1134360447, now seen corresponding path program 24 times [2021-06-05 23:04:09,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:09,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235075778] [2021-06-05 23:04:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:04:09,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:09,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235075778] [2021-06-05 23:04:09,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235075778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:09,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326072991] [2021-06-05 23:04:09,949 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:09,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:04:09,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:09,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:04:09,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:10,295 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:04:10,295 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 31 treesize of output 19 [2021-06-05 23:04:10,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:10,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:10,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:10,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 23:04:10,365 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:04:10,366 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 25 treesize of output 13 [2021-06-05 23:04:10,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:10,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:10,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:10,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:04:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:10,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326072991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:10,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:10,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-06-05 23:04:10,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997048507] [2021-06-05 23:04:10,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:04:10,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:10,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:04:10,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:04:10,443 INFO L87 Difference]: Start difference. First operand 8595 states and 28387 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:16,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:16,520 INFO L93 Difference]: Finished difference Result 35903 states and 119478 transitions. [2021-06-05 23:04:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-06-05 23:04:16,520 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:04:16,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:16,574 INFO L225 Difference]: With dead ends: 35903 [2021-06-05 23:04:16,575 INFO L226 Difference]: Without dead ends: 31668 [2021-06-05 23:04:16,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12211 ImplicationChecksByTransitivity, 4713.5ms TimeCoverageRelationStatistics Valid=3970, Invalid=27182, Unknown=0, NotChecked=0, Total=31152 [2021-06-05 23:04:16,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31668 states. [2021-06-05 23:04:16,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31668 to 9033. [2021-06-05 23:04:16,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9033 states, 9032 states have (on average 3.2980513728963685) internal successors, (29788), 9032 states have internal predecessors, (29788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9033 states to 9033 states and 29788 transitions. [2021-06-05 23:04:16,809 INFO L78 Accepts]: Start accepts. Automaton has 9033 states and 29788 transitions. Word has length 44 [2021-06-05 23:04:16,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:16,809 INFO L482 AbstractCegarLoop]: Abstraction has 9033 states and 29788 transitions. [2021-06-05 23:04:16,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:16,809 INFO L276 IsEmpty]: Start isEmpty. Operand 9033 states and 29788 transitions. [2021-06-05 23:04:16,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:04:16,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:16,820 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:17,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:17,020 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:17,021 INFO L82 PathProgramCache]: Analyzing trace with hash -345053005, now seen corresponding path program 25 times [2021-06-05 23:04:17,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:17,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492902165] [2021-06-05 23:04:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:17,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:17,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492902165] [2021-06-05 23:04:17,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492902165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:17,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041769618] [2021-06-05 23:04:17,296 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:17,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:04:17,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:17,596 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:04:17,596 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 31 treesize of output 19 [2021-06-05 23:04:17,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:17,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:17,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:17,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-06-05 23:04:17,716 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:04:17,716 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 25 treesize of output 13 [2021-06-05 23:04:17,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:17,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:17,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:17,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:04:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:17,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041769618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:17,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:17,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:04:17,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946746719] [2021-06-05 23:04:17,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:04:17,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:17,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:04:17,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:04:17,780 INFO L87 Difference]: Start difference. First operand 9033 states and 29788 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:21,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:21,661 INFO L93 Difference]: Finished difference Result 36007 states and 119800 transitions. [2021-06-05 23:04:21,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 23:04:21,661 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:04:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:21,723 INFO L225 Difference]: With dead ends: 36007 [2021-06-05 23:04:21,723 INFO L226 Difference]: Without dead ends: 35475 [2021-06-05 23:04:21,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4445 ImplicationChecksByTransitivity, 2878.8ms TimeCoverageRelationStatistics Valid=2074, Invalid=11968, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 23:04:21,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35475 states. [2021-06-05 23:04:22,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35475 to 9234. [2021-06-05 23:04:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9234 states, 9233 states have (on average 3.30336835264811) internal successors, (30500), 9233 states have internal predecessors, (30500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:22,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9234 states to 9234 states and 30500 transitions. [2021-06-05 23:04:22,065 INFO L78 Accepts]: Start accepts. Automaton has 9234 states and 30500 transitions. Word has length 44 [2021-06-05 23:04:22,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:22,065 INFO L482 AbstractCegarLoop]: Abstraction has 9234 states and 30500 transitions. [2021-06-05 23:04:22,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:22,065 INFO L276 IsEmpty]: Start isEmpty. Operand 9234 states and 30500 transitions. [2021-06-05 23:04:22,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:04:22,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:22,076 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:22,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 23:04:22,277 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:22,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:22,277 INFO L82 PathProgramCache]: Analyzing trace with hash -852376811, now seen corresponding path program 26 times [2021-06-05 23:04:22,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:22,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463801824] [2021-06-05 23:04:22,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:22,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:22,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463801824] [2021-06-05 23:04:22,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463801824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:22,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303322126] [2021-06-05 23:04:22,553 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:22,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:04:22,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:22,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:04:22,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:22,846 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:04:22,846 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 31 treesize of output 19 [2021-06-05 23:04:22,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:22,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:22,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:22,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-06-05 23:04:22,970 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:04:22,970 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 25 treesize of output 13 [2021-06-05 23:04:22,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:22,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:22,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:22,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:04:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:23,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303322126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:23,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:23,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:04:23,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498427220] [2021-06-05 23:04:23,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:04:23,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:23,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:04:23,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:04:23,034 INFO L87 Difference]: Start difference. First operand 9234 states and 30500 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:27,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:27,018 INFO L93 Difference]: Finished difference Result 34504 states and 114768 transitions. [2021-06-05 23:04:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 23:04:27,019 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:04:27,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:27,079 INFO L225 Difference]: With dead ends: 34504 [2021-06-05 23:04:27,079 INFO L226 Difference]: Without dead ends: 34104 [2021-06-05 23:04:27,080 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4257 ImplicationChecksByTransitivity, 3054.1ms TimeCoverageRelationStatistics Valid=2087, Invalid=11253, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 23:04:27,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34104 states. [2021-06-05 23:04:27,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34104 to 9294. [2021-06-05 23:04:27,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9294 states, 9293 states have (on average 3.3035618207252773) internal successors, (30700), 9293 states have internal predecessors, (30700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9294 states to 9294 states and 30700 transitions. [2021-06-05 23:04:27,359 INFO L78 Accepts]: Start accepts. Automaton has 9294 states and 30700 transitions. Word has length 44 [2021-06-05 23:04:27,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:27,359 INFO L482 AbstractCegarLoop]: Abstraction has 9294 states and 30700 transitions. [2021-06-05 23:04:27,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:27,359 INFO L276 IsEmpty]: Start isEmpty. Operand 9294 states and 30700 transitions. [2021-06-05 23:04:27,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:04:27,371 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:27,371 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:27,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:27,572 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:27,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:27,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1770455821, now seen corresponding path program 27 times [2021-06-05 23:04:27,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:27,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933419601] [2021-06-05 23:04:27,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:27,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:27,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933419601] [2021-06-05 23:04:27,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933419601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:27,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123977108] [2021-06-05 23:04:27,881 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 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 [2021-06-05 23:04:27,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:04:27,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:27,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:04:27,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:28,170 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:04:28,171 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 31 treesize of output 19 [2021-06-05 23:04:28,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:28,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:28,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:28,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-06-05 23:04:28,293 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:04:28,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 23:04:28,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:28,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:28,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:28,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:04:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:28,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123977108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:28,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:28,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:04:28,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454857812] [2021-06-05 23:04:28,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:04:28,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:28,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:04:28,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:04:28,359 INFO L87 Difference]: Start difference. First operand 9294 states and 30700 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:33,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:33,226 INFO L93 Difference]: Finished difference Result 36651 states and 121809 transitions. [2021-06-05 23:04:33,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 23:04:33,226 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:04:33,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:33,290 INFO L225 Difference]: With dead ends: 36651 [2021-06-05 23:04:33,290 INFO L226 Difference]: Without dead ends: 36236 [2021-06-05 23:04:33,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5972 ImplicationChecksByTransitivity, 3775.1ms TimeCoverageRelationStatistics Valid=2681, Invalid=15141, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 23:04:33,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36236 states. [2021-06-05 23:04:33,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36236 to 9180. [2021-06-05 23:04:33,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9180 states, 9179 states have (on average 3.302974180193921) internal successors, (30318), 9179 states have internal predecessors, (30318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:33,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9180 states to 9180 states and 30318 transitions. [2021-06-05 23:04:33,628 INFO L78 Accepts]: Start accepts. Automaton has 9180 states and 30318 transitions. Word has length 44 [2021-06-05 23:04:33,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:33,628 INFO L482 AbstractCegarLoop]: Abstraction has 9180 states and 30318 transitions. [2021-06-05 23:04:33,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand 9180 states and 30318 transitions. [2021-06-05 23:04:33,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:04:33,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:33,639 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:33,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 23:04:33,841 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:33,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:33,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1463918135, now seen corresponding path program 28 times [2021-06-05 23:04:33,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:33,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256173901] [2021-06-05 23:04:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:34,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:34,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256173901] [2021-06-05 23:04:34,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256173901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:34,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462471010] [2021-06-05 23:04:34,135 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:34,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:04:34,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:34,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:04:34,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:34,446 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:04:34,446 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 31 treesize of output 19 [2021-06-05 23:04:34,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:34,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:34,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:34,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:27 [2021-06-05 23:04:34,546 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:04:34,546 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 25 treesize of output 13 [2021-06-05 23:04:34,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:34,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:34,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:34,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:04:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:34,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462471010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:34,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:34,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:04:34,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431934040] [2021-06-05 23:04:34,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:04:34,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:34,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:04:34,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:04:34,611 INFO L87 Difference]: Start difference. First operand 9180 states and 30318 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:38,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:38,443 INFO L93 Difference]: Finished difference Result 34096 states and 113371 transitions. [2021-06-05 23:04:38,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 23:04:38,443 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:04:38,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:38,502 INFO L225 Difference]: With dead ends: 34096 [2021-06-05 23:04:38,503 INFO L226 Difference]: Without dead ends: 33696 [2021-06-05 23:04:38,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3805 ImplicationChecksByTransitivity, 2834.6ms TimeCoverageRelationStatistics Valid=1870, Invalid=10340, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 23:04:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33696 states. [2021-06-05 23:04:38,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33696 to 9279. [2021-06-05 23:04:38,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9279 states, 9278 states have (on average 3.3040525975425736) internal successors, (30655), 9278 states have internal predecessors, (30655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:38,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9279 states to 9279 states and 30655 transitions. [2021-06-05 23:04:38,776 INFO L78 Accepts]: Start accepts. Automaton has 9279 states and 30655 transitions. Word has length 44 [2021-06-05 23:04:38,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:38,777 INFO L482 AbstractCegarLoop]: Abstraction has 9279 states and 30655 transitions. [2021-06-05 23:04:38,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:38,777 INFO L276 IsEmpty]: Start isEmpty. Operand 9279 states and 30655 transitions. [2021-06-05 23:04:38,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:04:38,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:38,788 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:38,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:38,989 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:38,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:38,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1912970151, now seen corresponding path program 29 times [2021-06-05 23:04:38,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:38,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348621740] [2021-06-05 23:04:38,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:39,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:39,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348621740] [2021-06-05 23:04:39,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348621740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:39,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387789399] [2021-06-05 23:04:39,289 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:39,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:04:39,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:39,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 23:04:39,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:39,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:04:39,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:04:39,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 23:04:39,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:39,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:39,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:39,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:27 [2021-06-05 23:04:39,736 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:04:39,737 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 25 treesize of output 13 [2021-06-05 23:04:39,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:39,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:39,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:39,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:04:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:39,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387789399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:39,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:39,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:04:39,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243997267] [2021-06-05 23:04:39,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:04:39,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:39,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:04:39,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:04:39,803 INFO L87 Difference]: Start difference. First operand 9279 states and 30655 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:44,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:44,529 INFO L93 Difference]: Finished difference Result 35956 states and 119480 transitions. [2021-06-05 23:04:44,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 23:04:44,530 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:04:44,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:44,595 INFO L225 Difference]: With dead ends: 35956 [2021-06-05 23:04:44,596 INFO L226 Difference]: Without dead ends: 35541 [2021-06-05 23:04:44,597 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5432 ImplicationChecksByTransitivity, 3480.2ms TimeCoverageRelationStatistics Valid=2393, Invalid=13863, Unknown=0, NotChecked=0, Total=16256 [2021-06-05 23:04:44,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35541 states. [2021-06-05 23:04:44,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35541 to 9180. [2021-06-05 23:04:44,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9180 states, 9179 states have (on average 3.302974180193921) internal successors, (30318), 9179 states have internal predecessors, (30318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9180 states to 9180 states and 30318 transitions. [2021-06-05 23:04:44,922 INFO L78 Accepts]: Start accepts. Automaton has 9180 states and 30318 transitions. Word has length 44 [2021-06-05 23:04:44,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:44,922 INFO L482 AbstractCegarLoop]: Abstraction has 9180 states and 30318 transitions. [2021-06-05 23:04:44,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:44,922 INFO L276 IsEmpty]: Start isEmpty. Operand 9180 states and 30318 transitions. [2021-06-05 23:04:44,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:04:44,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:44,934 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:45,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 23:04:45,134 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:45,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:45,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1715563337, now seen corresponding path program 30 times [2021-06-05 23:04:45,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:45,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610528387] [2021-06-05 23:04:45,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:45,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:45,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610528387] [2021-06-05 23:04:45,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610528387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:45,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338952212] [2021-06-05 23:04:45,440 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:45,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:04:45,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:45,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:04:45,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:45,799 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:04:45,799 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 31 treesize of output 19 [2021-06-05 23:04:45,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:45,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:45,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:45,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 23:04:45,869 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:04:45,869 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 25 treesize of output 13 [2021-06-05 23:04:45,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:45,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:45,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:45,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:04:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:45,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338952212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:45,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:45,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 23:04:45,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253026650] [2021-06-05 23:04:45,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:04:45,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:45,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:04:45,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:04:45,936 INFO L87 Difference]: Start difference. First operand 9180 states and 30318 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:50,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:50,934 INFO L93 Difference]: Finished difference Result 32902 states and 109101 transitions. [2021-06-05 23:04:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 23:04:50,935 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:04:50,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:50,990 INFO L225 Difference]: With dead ends: 32902 [2021-06-05 23:04:50,991 INFO L226 Difference]: Without dead ends: 32417 [2021-06-05 23:04:50,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6854 ImplicationChecksByTransitivity, 3971.2ms TimeCoverageRelationStatistics Valid=2753, Invalid=17269, Unknown=0, NotChecked=0, Total=20022 [2021-06-05 23:04:51,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32417 states. [2021-06-05 23:04:51,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32417 to 9018. [2021-06-05 23:04:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9018 states, 9017 states have (on average 3.301763335921038) internal successors, (29772), 9017 states have internal predecessors, (29772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:51,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9018 states to 9018 states and 29772 transitions. [2021-06-05 23:04:51,242 INFO L78 Accepts]: Start accepts. Automaton has 9018 states and 29772 transitions. Word has length 44 [2021-06-05 23:04:51,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:51,242 INFO L482 AbstractCegarLoop]: Abstraction has 9018 states and 29772 transitions. [2021-06-05 23:04:51,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:51,242 INFO L276 IsEmpty]: Start isEmpty. Operand 9018 states and 29772 transitions. [2021-06-05 23:04:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:04:51,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:51,253 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:51,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:51,453 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:51,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:51,454 INFO L82 PathProgramCache]: Analyzing trace with hash 856011747, now seen corresponding path program 31 times [2021-06-05 23:04:51,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:51,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128456093] [2021-06-05 23:04:51,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:04:51,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:51,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128456093] [2021-06-05 23:04:51,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128456093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:51,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660566816] [2021-06-05 23:04:51,744 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:51,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:04:51,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:52,101 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:04:52,101 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 31 treesize of output 19 [2021-06-05 23:04:52,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:52,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:52,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:52,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 23:04:52,167 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:04:52,167 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 25 treesize of output 13 [2021-06-05 23:04:52,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:52,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:52,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:52,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:04:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:52,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660566816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:52,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:52,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-06-05 23:04:52,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459119210] [2021-06-05 23:04:52,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:04:52,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:52,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:04:52,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:04:52,231 INFO L87 Difference]: Start difference. First operand 9018 states and 29772 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:57,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:57,562 INFO L93 Difference]: Finished difference Result 32479 states and 108314 transitions. [2021-06-05 23:04:57,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-05 23:04:57,562 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:04:57,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:57,613 INFO L225 Difference]: With dead ends: 32479 [2021-06-05 23:04:57,614 INFO L226 Difference]: Without dead ends: 28654 [2021-06-05 23:04:57,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10023 ImplicationChecksByTransitivity, 4088.7ms TimeCoverageRelationStatistics Valid=3473, Invalid=22609, Unknown=0, NotChecked=0, Total=26082 [2021-06-05 23:04:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28654 states. [2021-06-05 23:04:57,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28654 to 9358. [2021-06-05 23:04:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9358 states, 9357 states have (on average 3.2972106444373197) internal successors, (30852), 9357 states have internal predecessors, (30852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9358 states to 9358 states and 30852 transitions. [2021-06-05 23:04:57,839 INFO L78 Accepts]: Start accepts. Automaton has 9358 states and 30852 transitions. Word has length 44 [2021-06-05 23:04:57,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:57,839 INFO L482 AbstractCegarLoop]: Abstraction has 9358 states and 30852 transitions. [2021-06-05 23:04:57,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:57,839 INFO L276 IsEmpty]: Start isEmpty. Operand 9358 states and 30852 transitions. [2021-06-05 23:04:57,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:04:57,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:57,851 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:58,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:58,055 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:58,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:58,055 INFO L82 PathProgramCache]: Analyzing trace with hash 218619737, now seen corresponding path program 32 times [2021-06-05 23:04:58,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:58,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063651973] [2021-06-05 23:04:58,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:04:58,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:58,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063651973] [2021-06-05 23:04:58,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063651973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:58,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993638373] [2021-06-05 23:04:58,337 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 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 [2021-06-05 23:04:58,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:04:58,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:58,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:04:58,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:58,677 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:04:58,677 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 31 treesize of output 19 [2021-06-05 23:04:58,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:58,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:58,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:58,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 23:04:58,745 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:04:58,745 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 25 treesize of output 13 [2021-06-05 23:04:58,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:04:58,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:04:58,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:04:58,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:04:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:58,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993638373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:58,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:58,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-06-05 23:04:58,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484041905] [2021-06-05 23:04:58,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:04:58,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:58,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:04:58,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:04:58,817 INFO L87 Difference]: Start difference. First operand 9358 states and 30852 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:04,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:04,153 INFO L93 Difference]: Finished difference Result 35967 states and 119998 transitions. [2021-06-05 23:05:04,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-06-05 23:05:04,153 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 23:05:04,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:04,217 INFO L225 Difference]: With dead ends: 35967 [2021-06-05 23:05:04,218 INFO L226 Difference]: Without dead ends: 33259 [2021-06-05 23:05:04,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10209 ImplicationChecksByTransitivity, 4446.0ms TimeCoverageRelationStatistics Valid=3565, Invalid=23167, Unknown=0, NotChecked=0, Total=26732 [2021-06-05 23:05:04,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33259 states. [2021-06-05 23:05:04,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33259 to 9428. [2021-06-05 23:05:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9428 states, 9427 states have (on average 3.294049008168028) internal successors, (31053), 9427 states have internal predecessors, (31053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9428 states to 9428 states and 31053 transitions. [2021-06-05 23:05:04,531 INFO L78 Accepts]: Start accepts. Automaton has 9428 states and 31053 transitions. Word has length 44 [2021-06-05 23:05:04,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:04,532 INFO L482 AbstractCegarLoop]: Abstraction has 9428 states and 31053 transitions. [2021-06-05 23:05:04,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:04,532 INFO L276 IsEmpty]: Start isEmpty. Operand 9428 states and 31053 transitions. [2021-06-05 23:05:04,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:05:04,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:04,544 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:04,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 23:05:04,749 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:04,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:04,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1309223083, now seen corresponding path program 33 times [2021-06-05 23:05:04,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:04,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898032555] [2021-06-05 23:05:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:04,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:04,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898032555] [2021-06-05 23:05:04,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898032555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:04,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649425642] [2021-06-05 23:05:04,767 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:04,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:05:04,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:04,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:05:04,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:05:04,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649425642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:04,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:04,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 23:05:04,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168842609] [2021-06-05 23:05:04,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:05:04,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:04,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:05:04,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:05:04,855 INFO L87 Difference]: Start difference. First operand 9428 states and 31053 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:04,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:04,903 INFO L93 Difference]: Finished difference Result 14357 states and 47370 transitions. [2021-06-05 23:05:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:05:04,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:05:04,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:04,925 INFO L225 Difference]: With dead ends: 14357 [2021-06-05 23:05:04,925 INFO L226 Difference]: Without dead ends: 14153 [2021-06-05 23:05:04,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:05:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14153 states. [2021-06-05 23:05:05,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14153 to 10944. [2021-06-05 23:05:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10944 states, 10943 states have (on average 3.3225806451612905) internal successors, (36359), 10943 states have internal predecessors, (36359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:05,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10944 states to 10944 states and 36359 transitions. [2021-06-05 23:05:05,085 INFO L78 Accepts]: Start accepts. Automaton has 10944 states and 36359 transitions. Word has length 47 [2021-06-05 23:05:05,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:05,086 INFO L482 AbstractCegarLoop]: Abstraction has 10944 states and 36359 transitions. [2021-06-05 23:05:05,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:05,086 INFO L276 IsEmpty]: Start isEmpty. Operand 10944 states and 36359 transitions. [2021-06-05 23:05:05,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:05:05,100 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:05,100 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:05,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:05,300 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:05,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:05,300 INFO L82 PathProgramCache]: Analyzing trace with hash 2079845064, now seen corresponding path program 34 times [2021-06-05 23:05:05,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:05,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130638058] [2021-06-05 23:05:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:05,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:05,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130638058] [2021-06-05 23:05:05,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130638058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:05,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429188401] [2021-06-05 23:05:05,539 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:05,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:05:05,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:05,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:05:05,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:05,868 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:05:05,869 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 29 treesize of output 17 [2021-06-05 23:05:05,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:05,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:05,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:05,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 23:05:06,009 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:05:06,009 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 25 treesize of output 13 [2021-06-05 23:05:06,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:06,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:06,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:06,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:05:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:06,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429188401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:06,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:06,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 23:05:06,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423511792] [2021-06-05 23:05:06,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:05:06,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:06,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:05:06,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:05:06,074 INFO L87 Difference]: Start difference. First operand 10944 states and 36359 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:08,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:08,039 INFO L93 Difference]: Finished difference Result 26668 states and 88897 transitions. [2021-06-05 23:05:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:05:08,040 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:05:08,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:08,147 INFO L225 Difference]: With dead ends: 26668 [2021-06-05 23:05:08,147 INFO L226 Difference]: Without dead ends: 26368 [2021-06-05 23:05:08,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1608.6ms TimeCoverageRelationStatistics Valid=858, Invalid=4994, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 23:05:08,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26368 states. [2021-06-05 23:05:08,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26368 to 11105. [2021-06-05 23:05:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11105 states, 11104 states have (on average 3.3218659942363113) internal successors, (36886), 11104 states have internal predecessors, (36886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11105 states to 11105 states and 36886 transitions. [2021-06-05 23:05:08,357 INFO L78 Accepts]: Start accepts. Automaton has 11105 states and 36886 transitions. Word has length 47 [2021-06-05 23:05:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:08,357 INFO L482 AbstractCegarLoop]: Abstraction has 11105 states and 36886 transitions. [2021-06-05 23:05:08,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:08,357 INFO L276 IsEmpty]: Start isEmpty. Operand 11105 states and 36886 transitions. [2021-06-05 23:05:08,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:05:08,371 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:08,371 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:08,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 23:05:08,572 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:08,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1161766054, now seen corresponding path program 35 times [2021-06-05 23:05:08,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:08,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127635530] [2021-06-05 23:05:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:08,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:08,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127635530] [2021-06-05 23:05:08,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127635530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:08,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462242578] [2021-06-05 23:05:08,817 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:08,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:05:08,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:08,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 23:05:08,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:09,137 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:05:09,137 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 29 treesize of output 17 [2021-06-05 23:05:09,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:09,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:09,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:09,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 23:05:09,259 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:05:09,259 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 25 treesize of output 13 [2021-06-05 23:05:09,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:09,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:09,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:09,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:05:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:09,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462242578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:09,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:09,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 23:05:09,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108758906] [2021-06-05 23:05:09,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:05:09,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:09,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:05:09,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:05:09,324 INFO L87 Difference]: Start difference. First operand 11105 states and 36886 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:12,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:12,019 INFO L93 Difference]: Finished difference Result 32478 states and 107950 transitions. [2021-06-05 23:05:12,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 23:05:12,020 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:05:12,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:12,074 INFO L225 Difference]: With dead ends: 32478 [2021-06-05 23:05:12,074 INFO L226 Difference]: Without dead ends: 32178 [2021-06-05 23:05:12,074 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 2139.5ms TimeCoverageRelationStatistics Valid=1265, Invalid=7477, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 23:05:12,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32178 states. [2021-06-05 23:05:12,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32178 to 10959. [2021-06-05 23:05:12,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10959 states, 10958 states have (on average 3.322139076473809) internal successors, (36404), 10958 states have internal predecessors, (36404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10959 states to 10959 states and 36404 transitions. [2021-06-05 23:05:12,331 INFO L78 Accepts]: Start accepts. Automaton has 10959 states and 36404 transitions. Word has length 47 [2021-06-05 23:05:12,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:12,331 INFO L482 AbstractCegarLoop]: Abstraction has 10959 states and 36404 transitions. [2021-06-05 23:05:12,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 10959 states and 36404 transitions. [2021-06-05 23:05:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:05:12,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:12,345 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:12,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 23:05:12,546 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:12,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1559125806, now seen corresponding path program 36 times [2021-06-05 23:05:12,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:12,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105459700] [2021-06-05 23:05:12,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:12,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:12,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105459700] [2021-06-05 23:05:12,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105459700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:12,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359034329] [2021-06-05 23:05:12,788 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:12,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:05:12,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:12,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:05:12,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:13,094 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:05:13,094 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 29 treesize of output 17 [2021-06-05 23:05:13,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:13,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:13,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:13,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 23:05:13,228 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:05:13,228 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 25 treesize of output 13 [2021-06-05 23:05:13,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:13,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:13,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:13,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:05:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:13,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359034329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:13,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:13,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 23:05:13,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622027196] [2021-06-05 23:05:13,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:05:13,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:13,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:05:13,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:05:13,307 INFO L87 Difference]: Start difference. First operand 10959 states and 36404 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:15,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:15,195 INFO L93 Difference]: Finished difference Result 26320 states and 87742 transitions. [2021-06-05 23:05:15,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:05:15,196 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:05:15,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:15,242 INFO L225 Difference]: With dead ends: 26320 [2021-06-05 23:05:15,242 INFO L226 Difference]: Without dead ends: 26020 [2021-06-05 23:05:15,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1576.5ms TimeCoverageRelationStatistics Valid=863, Invalid=4989, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 23:05:15,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26020 states. [2021-06-05 23:05:15,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26020 to 10970. [2021-06-05 23:05:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10970 states, 10969 states have (on average 3.322271857051691) internal successors, (36442), 10969 states have internal predecessors, (36442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:15,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10970 states to 10970 states and 36442 transitions. [2021-06-05 23:05:15,507 INFO L78 Accepts]: Start accepts. Automaton has 10970 states and 36442 transitions. Word has length 47 [2021-06-05 23:05:15,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:15,507 INFO L482 AbstractCegarLoop]: Abstraction has 10970 states and 36442 transitions. [2021-06-05 23:05:15,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:15,507 INFO L276 IsEmpty]: Start isEmpty. Operand 10970 states and 36442 transitions. [2021-06-05 23:05:15,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:05:15,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:15,520 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:15,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 23:05:15,721 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:15,721 INFO L82 PathProgramCache]: Analyzing trace with hash 641046796, now seen corresponding path program 37 times [2021-06-05 23:05:15,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:15,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850182672] [2021-06-05 23:05:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:16,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:16,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850182672] [2021-06-05 23:05:16,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850182672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:16,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321431595] [2021-06-05 23:05:16,006 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:16,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:05:16,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:16,304 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:05:16,304 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 29 treesize of output 17 [2021-06-05 23:05:16,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:16,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:16,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:16,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 23:05:16,424 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:05:16,424 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 25 treesize of output 13 [2021-06-05 23:05:16,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:16,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:16,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:16,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:05:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:16,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321431595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:16,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:16,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 23:05:16,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888305726] [2021-06-05 23:05:16,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:05:16,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:16,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:05:16,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:05:16,488 INFO L87 Difference]: Start difference. First operand 10970 states and 36442 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:19,226 INFO L93 Difference]: Finished difference Result 31704 states and 105322 transitions. [2021-06-05 23:05:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:05:19,227 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:05:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:19,280 INFO L225 Difference]: With dead ends: 31704 [2021-06-05 23:05:19,280 INFO L226 Difference]: Without dead ends: 31404 [2021-06-05 23:05:19,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 2102.1ms TimeCoverageRelationStatistics Valid=1225, Invalid=7147, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 23:05:19,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31404 states. [2021-06-05 23:05:19,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31404 to 10809. [2021-06-05 23:05:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10809 states, 10808 states have (on average 3.3230014803849) internal successors, (35915), 10808 states have internal predecessors, (35915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:19,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10809 states to 10809 states and 35915 transitions. [2021-06-05 23:05:19,533 INFO L78 Accepts]: Start accepts. Automaton has 10809 states and 35915 transitions. Word has length 47 [2021-06-05 23:05:19,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:19,533 INFO L482 AbstractCegarLoop]: Abstraction has 10809 states and 35915 transitions. [2021-06-05 23:05:19,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:19,533 INFO L276 IsEmpty]: Start isEmpty. Operand 10809 states and 35915 transitions. [2021-06-05 23:05:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 23:05:19,547 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:19,547 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:19,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 23:05:19,747 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:19,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:19,747 INFO L82 PathProgramCache]: Analyzing trace with hash -590498608, now seen corresponding path program 38 times [2021-06-05 23:05:19,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:19,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359413962] [2021-06-05 23:05:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:05:19,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:19,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359413962] [2021-06-05 23:05:19,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359413962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:19,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445622468] [2021-06-05 23:05:19,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:19,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:05:19,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:19,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:05:19,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 23:05:19,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445622468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:19,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:19,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 23:05:19,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530841247] [2021-06-05 23:05:19,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:05:19,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:19,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:05:19,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:05:19,859 INFO L87 Difference]: Start difference. First operand 10809 states and 35915 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2021-06-05 23:05:19,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:19,917 INFO L93 Difference]: Finished difference Result 18453 states and 61519 transitions. [2021-06-05 23:05:19,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:05:19,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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 51 [2021-06-05 23:05:19,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:19,946 INFO L225 Difference]: With dead ends: 18453 [2021-06-05 23:05:19,946 INFO L226 Difference]: Without dead ends: 17839 [2021-06-05 23:05:19,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:05:19,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17839 states. [2021-06-05 23:05:20,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17839 to 12699. [2021-06-05 23:05:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12699 states, 12698 states have (on average 3.361946763269806) internal successors, (42690), 12698 states have internal predecessors, (42690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:20,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12699 states to 12699 states and 42690 transitions. [2021-06-05 23:05:20,151 INFO L78 Accepts]: Start accepts. Automaton has 12699 states and 42690 transitions. Word has length 51 [2021-06-05 23:05:20,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:20,151 INFO L482 AbstractCegarLoop]: Abstraction has 12699 states and 42690 transitions. [2021-06-05 23:05:20,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2021-06-05 23:05:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 12699 states and 42690 transitions. [2021-06-05 23:05:20,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 23:05:20,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:20,174 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:20,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:20,385 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:20,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:20,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1803464833, now seen corresponding path program 39 times [2021-06-05 23:05:20,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:20,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694857584] [2021-06-05 23:05:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:20,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:20,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694857584] [2021-06-05 23:05:20,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694857584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:20,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969059932] [2021-06-05 23:05:20,679 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:20,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:05:20,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:20,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:05:20,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:21,027 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:05:21,027 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 35 treesize of output 19 [2021-06-05 23:05:21,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:21,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:21,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:21,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:29 [2021-06-05 23:05:21,168 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:05:21,168 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 25 treesize of output 13 [2021-06-05 23:05:21,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:21,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:21,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:21,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:05:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:21,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969059932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:21,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:21,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 23:05:21,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233971356] [2021-06-05 23:05:21,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:05:21,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:21,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:05:21,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:05:21,234 INFO L87 Difference]: Start difference. First operand 12699 states and 42690 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:28,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:28,384 INFO L93 Difference]: Finished difference Result 86229 states and 293816 transitions. [2021-06-05 23:05:28,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2021-06-05 23:05:28,384 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 23:05:28,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:28,552 INFO L225 Difference]: With dead ends: 86229 [2021-06-05 23:05:28,552 INFO L226 Difference]: Without dead ends: 84335 [2021-06-05 23:05:28,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18200 ImplicationChecksByTransitivity, 5452.2ms TimeCoverageRelationStatistics Valid=5140, Invalid=40442, Unknown=0, NotChecked=0, Total=45582 [2021-06-05 23:05:28,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84335 states. [2021-06-05 23:05:29,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84335 to 13212. [2021-06-05 23:05:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13212 states, 13211 states have (on average 3.3770342896071455) internal successors, (44614), 13211 states have internal predecessors, (44614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13212 states to 13212 states and 44614 transitions. [2021-06-05 23:05:29,182 INFO L78 Accepts]: Start accepts. Automaton has 13212 states and 44614 transitions. Word has length 51 [2021-06-05 23:05:29,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:29,182 INFO L482 AbstractCegarLoop]: Abstraction has 13212 states and 44614 transitions. [2021-06-05 23:05:29,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 13212 states and 44614 transitions. [2021-06-05 23:05:29,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 23:05:29,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:29,199 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:29,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:29,400 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:29,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:29,400 INFO L82 PathProgramCache]: Analyzing trace with hash -746735621, now seen corresponding path program 40 times [2021-06-05 23:05:29,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:29,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258933661] [2021-06-05 23:05:29,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:29,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:29,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258933661] [2021-06-05 23:05:29,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258933661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:29,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022189944] [2021-06-05 23:05:29,748 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:29,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:05:29,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:29,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 23:05:29,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:30,055 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 23:05:30,055 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 35 treesize of output 19 [2021-06-05 23:05:30,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:30,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:30,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:30,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:29 [2021-06-05 23:05:30,228 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:05:30,228 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 25 treesize of output 13 [2021-06-05 23:05:30,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:30,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:30,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:30,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 23:05:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:30,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022189944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:30,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:30,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 23:05:30,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311936226] [2021-06-05 23:05:30,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:05:30,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:30,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:05:30,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:05:30,294 INFO L87 Difference]: Start difference. First operand 13212 states and 44614 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:37,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:37,396 INFO L93 Difference]: Finished difference Result 80772 states and 276597 transitions. [2021-06-05 23:05:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2021-06-05 23:05:37,396 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 23:05:37,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:37,700 INFO L225 Difference]: With dead ends: 80772 [2021-06-05 23:05:37,700 INFO L226 Difference]: Without dead ends: 78736 [2021-06-05 23:05:37,702 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15383 ImplicationChecksByTransitivity, 5111.4ms TimeCoverageRelationStatistics Valid=4605, Invalid=34797, Unknown=0, NotChecked=0, Total=39402 [2021-06-05 23:05:37,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78736 states. [2021-06-05 23:05:38,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78736 to 13623. [2021-06-05 23:05:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13623 states, 13622 states have (on average 3.3828365878725593) internal successors, (46081), 13622 states have internal predecessors, (46081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:38,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13623 states to 13623 states and 46081 transitions. [2021-06-05 23:05:38,263 INFO L78 Accepts]: Start accepts. Automaton has 13623 states and 46081 transitions. Word has length 51 [2021-06-05 23:05:38,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:38,263 INFO L482 AbstractCegarLoop]: Abstraction has 13623 states and 46081 transitions. [2021-06-05 23:05:38,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:38,263 INFO L276 IsEmpty]: Start isEmpty. Operand 13623 states and 46081 transitions. [2021-06-05 23:05:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:05:38,281 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:38,281 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:38,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:38,481 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:38,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:38,482 INFO L82 PathProgramCache]: Analyzing trace with hash 643422605, now seen corresponding path program 41 times [2021-06-05 23:05:38,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:38,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977783806] [2021-06-05 23:05:38,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 23:05:38,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:38,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977783806] [2021-06-05 23:05:38,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977783806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:38,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112363299] [2021-06-05 23:05:38,805 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:38,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:05:38,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:38,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:05:38,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:39,477 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:05:39,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:05:39,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:39,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:39,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:39,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:42 [2021-06-05 23:05:39,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:05:39,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:05:39,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:05:39,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:05:39,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:05:39,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:05:39,586 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 38 treesize of output 18 [2021-06-05 23:05:39,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:39,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:39,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:39,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-06-05 23:05:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:39,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112363299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:39,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:39,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 42 [2021-06-05 23:05:39,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789314560] [2021-06-05 23:05:39,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 23:05:39,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:39,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 23:05:39,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:05:39,665 INFO L87 Difference]: Start difference. First operand 13623 states and 46081 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:40,851 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-06-05 23:05:50,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:50,432 INFO L93 Difference]: Finished difference Result 92840 states and 316083 transitions. [2021-06-05 23:05:50,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-06-05 23:05:50,433 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:05:50,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:50,614 INFO L225 Difference]: With dead ends: 92840 [2021-06-05 23:05:50,614 INFO L226 Difference]: Without dead ends: 88224 [2021-06-05 23:05:50,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21094 ImplicationChecksByTransitivity, 8742.0ms TimeCoverageRelationStatistics Valid=5822, Invalid=46848, Unknown=0, NotChecked=0, Total=52670 [2021-06-05 23:05:50,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88224 states. [2021-06-05 23:05:51,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88224 to 14423. [2021-06-05 23:05:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14423 states, 14422 states have (on average 3.370891693246429) internal successors, (48615), 14422 states have internal predecessors, (48615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14423 states to 14423 states and 48615 transitions. [2021-06-05 23:05:51,245 INFO L78 Accepts]: Start accepts. Automaton has 14423 states and 48615 transitions. Word has length 54 [2021-06-05 23:05:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:51,245 INFO L482 AbstractCegarLoop]: Abstraction has 14423 states and 48615 transitions. [2021-06-05 23:05:51,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand 14423 states and 48615 transitions. [2021-06-05 23:05:51,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:05:51,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:51,263 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:51,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 23:05:51,464 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:51,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:51,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1581400071, now seen corresponding path program 42 times [2021-06-05 23:05:51,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:51,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796153501] [2021-06-05 23:05:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:51,771 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 23:05:51,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:51,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796153501] [2021-06-05 23:05:51,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796153501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:51,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013430571] [2021-06-05 23:05:51,772 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 [2021-06-05 23:05:51,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:05:51,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:51,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:05:51,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:52,414 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:05:52,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:05:52,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:52,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:52,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:52,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 23:05:52,573 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:05:52,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:05:52,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:05:52,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:05:52,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:05:52,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:05:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:52,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013430571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:52,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:52,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 23:05:52,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100289632] [2021-06-05 23:05:52,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:05:52,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:52,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:05:52,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:05:52,647 INFO L87 Difference]: Start difference. First operand 14423 states and 48615 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:02,064 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-06-05 23:06:02,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:02,700 INFO L93 Difference]: Finished difference Result 91747 states and 309740 transitions. [2021-06-05 23:06:02,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2021-06-05 23:06:02,700 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:06:02,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:02,876 INFO L225 Difference]: With dead ends: 91747 [2021-06-05 23:06:02,876 INFO L226 Difference]: Without dead ends: 90897 [2021-06-05 23:06:02,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19894 ImplicationChecksByTransitivity, 7682.0ms TimeCoverageRelationStatistics Valid=5038, Invalid=45812, Unknown=0, NotChecked=0, Total=50850 [2021-06-05 23:06:02,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90897 states. [2021-06-05 23:06:03,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90897 to 15287. [2021-06-05 23:06:03,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15287 states, 15286 states have (on average 3.3639931963888525) internal successors, (51422), 15286 states have internal predecessors, (51422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15287 states to 15287 states and 51422 transitions. [2021-06-05 23:06:03,571 INFO L78 Accepts]: Start accepts. Automaton has 15287 states and 51422 transitions. Word has length 54 [2021-06-05 23:06:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:03,571 INFO L482 AbstractCegarLoop]: Abstraction has 15287 states and 51422 transitions. [2021-06-05 23:06:03,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 15287 states and 51422 transitions. [2021-06-05 23:06:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:06:03,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:03,591 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:03,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:03,791 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:03,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:03,792 INFO L82 PathProgramCache]: Analyzing trace with hash -2088723877, now seen corresponding path program 43 times [2021-06-05 23:06:03,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:03,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319980347] [2021-06-05 23:06:03,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 23:06:04,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:04,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319980347] [2021-06-05 23:06:04,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319980347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:04,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901378519] [2021-06-05 23:06:04,096 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 [2021-06-05 23:06:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:04,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:06:04,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:04,634 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:06:04,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 23:06:04,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:06:04,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:06:04,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:06:04,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 23:06:04,793 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:06:04,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:06:04,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:06:04,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:06:04,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:06:04,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:06:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:04,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901378519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:04,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:04,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 23:06:04,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512274999] [2021-06-05 23:06:04,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:04,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:04,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:04,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:04,866 INFO L87 Difference]: Start difference. First operand 15287 states and 51422 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:16,406 INFO L93 Difference]: Finished difference Result 101039 states and 340837 transitions. [2021-06-05 23:06:16,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2021-06-05 23:06:16,406 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:06:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:16,620 INFO L225 Difference]: With dead ends: 101039 [2021-06-05 23:06:16,620 INFO L226 Difference]: Without dead ends: 100149 [2021-06-05 23:06:16,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25131 ImplicationChecksByTransitivity, 9300.3ms TimeCoverageRelationStatistics Valid=6462, Invalid=56288, Unknown=0, NotChecked=0, Total=62750 [2021-06-05 23:06:16,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100149 states. [2021-06-05 23:06:17,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100149 to 15370. [2021-06-05 23:06:17,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15370 states, 15369 states have (on average 3.364695165593077) internal successors, (51712), 15369 states have internal predecessors, (51712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15370 states to 15370 states and 51712 transitions. [2021-06-05 23:06:17,321 INFO L78 Accepts]: Start accepts. Automaton has 15370 states and 51712 transitions. Word has length 54 [2021-06-05 23:06:17,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:17,322 INFO L482 AbstractCegarLoop]: Abstraction has 15370 states and 51712 transitions. [2021-06-05 23:06:17,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 15370 states and 51712 transitions. [2021-06-05 23:06:17,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:06:17,341 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:17,341 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:17,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 23:06:17,545 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:17,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:17,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1288164409, now seen corresponding path program 44 times [2021-06-05 23:06:17,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:17,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353367447] [2021-06-05 23:06:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 23:06:17,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:17,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353367447] [2021-06-05 23:06:17,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353367447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:17,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957145691] [2021-06-05 23:06:17,868 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 [2021-06-05 23:06:17,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:06:17,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:17,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:06:17,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:18,443 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:06:18,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 23:06:18,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:06:18,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:06:18,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:06:18,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 23:06:18,604 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:06:18,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:06:18,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:06:18,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:06:18,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:06:18,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:06:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:18,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957145691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:18,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:18,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 23:06:18,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265352758] [2021-06-05 23:06:18,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:18,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:18,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:18,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:18,678 INFO L87 Difference]: Start difference. First operand 15370 states and 51712 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:32,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:32,897 INFO L93 Difference]: Finished difference Result 124978 states and 424154 transitions. [2021-06-05 23:06:32,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2021-06-05 23:06:32,897 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:06:32,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:33,158 INFO L225 Difference]: With dead ends: 124978 [2021-06-05 23:06:33,158 INFO L226 Difference]: Without dead ends: 121408 [2021-06-05 23:06:33,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35074 ImplicationChecksByTransitivity, 11457.5ms TimeCoverageRelationStatistics Valid=8395, Invalid=75415, Unknown=0, NotChecked=0, Total=83810 [2021-06-05 23:06:33,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121408 states. [2021-06-05 23:06:34,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121408 to 17376. [2021-06-05 23:06:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17376 states, 17375 states have (on average 3.3524028776978416) internal successors, (58248), 17375 states have internal predecessors, (58248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:34,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17376 states to 17376 states and 58248 transitions. [2021-06-05 23:06:34,410 INFO L78 Accepts]: Start accepts. Automaton has 17376 states and 58248 transitions. Word has length 54 [2021-06-05 23:06:34,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:34,411 INFO L482 AbstractCegarLoop]: Abstraction has 17376 states and 58248 transitions. [2021-06-05 23:06:34,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:34,411 INFO L276 IsEmpty]: Start isEmpty. Operand 17376 states and 58248 transitions. [2021-06-05 23:06:34,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:06:34,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:34,435 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:34,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 23:06:34,643 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:34,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:34,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1594702095, now seen corresponding path program 45 times [2021-06-05 23:06:34,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:34,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062834533] [2021-06-05 23:06:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 23:06:34,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:34,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062834533] [2021-06-05 23:06:34,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062834533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:34,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309268428] [2021-06-05 23:06:34,959 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:35,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:06:35,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:35,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 23:06:35,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:35,612 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:06:35,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:06:35,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:06:35,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:06:35,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:06:35,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 23:06:35,749 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:06:35,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:06:35,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:06:35,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:06:35,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:06:35,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:06:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:35,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309268428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:35,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:35,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 23:06:35,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592018922] [2021-06-05 23:06:35,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:35,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:35,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:35,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:35,842 INFO L87 Difference]: Start difference. First operand 17376 states and 58248 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:46,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:46,772 INFO L93 Difference]: Finished difference Result 100564 states and 339046 transitions. [2021-06-05 23:06:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-06-05 23:06:46,781 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:06:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:46,988 INFO L225 Difference]: With dead ends: 100564 [2021-06-05 23:06:46,988 INFO L226 Difference]: Without dead ends: 99734 [2021-06-05 23:06:46,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22988 ImplicationChecksByTransitivity, 8672.8ms TimeCoverageRelationStatistics Valid=5801, Invalid=52039, Unknown=0, NotChecked=0, Total=57840 [2021-06-05 23:06:47,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99734 states. [2021-06-05 23:06:47,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99734 to 17519. [2021-06-05 23:06:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17519 states, 17518 states have (on average 3.3529512501427106) internal successors, (58737), 17518 states have internal predecessors, (58737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:47,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17519 states to 17519 states and 58737 transitions. [2021-06-05 23:06:47,804 INFO L78 Accepts]: Start accepts. Automaton has 17519 states and 58737 transitions. Word has length 54 [2021-06-05 23:06:47,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:47,804 INFO L482 AbstractCegarLoop]: Abstraction has 17519 states and 58737 transitions. [2021-06-05 23:06:47,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:47,805 INFO L276 IsEmpty]: Start isEmpty. Operand 17519 states and 58737 transitions. [2021-06-05 23:06:47,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:06:47,827 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:47,827 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:48,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 23:06:48,036 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:48,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:48,036 INFO L82 PathProgramCache]: Analyzing trace with hash 676623085, now seen corresponding path program 46 times [2021-06-05 23:06:48,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:48,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238320379] [2021-06-05 23:06:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 23:06:48,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:48,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238320379] [2021-06-05 23:06:48,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238320379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:48,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529584440] [2021-06-05 23:06:48,355 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:48,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:06:48,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:48,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:06:48,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:49,058 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:06:49,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:06:49,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:06:49,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:06:49,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:06:49,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 23:06:49,182 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:06:49,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:06:49,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:06:49,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:06:49,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:06:49,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:06:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:49,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529584440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:49,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:49,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 23:06:49,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454514781] [2021-06-05 23:06:49,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:06:49,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:49,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:06:49,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:06:49,255 INFO L87 Difference]: Start difference. First operand 17519 states and 58737 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:02,632 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-06-05 23:07:03,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:03,068 INFO L93 Difference]: Finished difference Result 106844 states and 359808 transitions. [2021-06-05 23:07:03,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2021-06-05 23:07:03,069 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:07:03,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:03,291 INFO L225 Difference]: With dead ends: 106844 [2021-06-05 23:07:03,291 INFO L226 Difference]: Without dead ends: 105974 [2021-06-05 23:07:03,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32263 ImplicationChecksByTransitivity, 11099.3ms TimeCoverageRelationStatistics Valid=7783, Invalid=69779, Unknown=0, NotChecked=0, Total=77562 [2021-06-05 23:07:03,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105974 states. [2021-06-05 23:07:04,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105974 to 16906. [2021-06-05 23:07:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16906 states, 16905 states have (on average 3.3510795622596863) internal successors, (56650), 16905 states have internal predecessors, (56650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:04,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16906 states to 16906 states and 56650 transitions. [2021-06-05 23:07:04,079 INFO L78 Accepts]: Start accepts. Automaton has 16906 states and 56650 transitions. Word has length 54 [2021-06-05 23:07:04,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:04,079 INFO L482 AbstractCegarLoop]: Abstraction has 16906 states and 56650 transitions. [2021-06-05 23:07:04,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:04,079 INFO L276 IsEmpty]: Start isEmpty. Operand 16906 states and 56650 transitions. [2021-06-05 23:07:04,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:07:04,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:04,102 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:04,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-06-05 23:07:04,317 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:04,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:04,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1343056893, now seen corresponding path program 47 times [2021-06-05 23:07:04,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:04,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153088581] [2021-06-05 23:07:04,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 23:07:04,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:04,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153088581] [2021-06-05 23:07:04,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153088581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:04,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037922929] [2021-06-05 23:07:04,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:04,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:07:04,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:04,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:07:04,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:05,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:07:05,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:05,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:05,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:05,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:05,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:05,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:07:05,679 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 51 treesize of output 31 [2021-06-05 23:07:05,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:07:05,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:07:05,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:07:05,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:37 [2021-06-05 23:07:05,774 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:07:05,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:07:05,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:07:05,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:07:05,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:07:05,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:07:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:05,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037922929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:05,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:05,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 23:07:05,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378744575] [2021-06-05 23:07:05,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:07:05,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:05,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:07:05,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:07:05,855 INFO L87 Difference]: Start difference. First operand 16906 states and 56650 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:16,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:16,602 INFO L93 Difference]: Finished difference Result 86669 states and 292345 transitions. [2021-06-05 23:07:16,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-06-05 23:07:16,603 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:07:16,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:16,772 INFO L225 Difference]: With dead ends: 86669 [2021-06-05 23:07:16,772 INFO L226 Difference]: Without dead ends: 85459 [2021-06-05 23:07:16,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20939 ImplicationChecksByTransitivity, 9034.4ms TimeCoverageRelationStatistics Valid=5562, Invalid=48030, Unknown=0, NotChecked=0, Total=53592 [2021-06-05 23:07:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85459 states. [2021-06-05 23:07:17,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85459 to 16784. [2021-06-05 23:07:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16784 states, 16783 states have (on average 3.352320800810344) internal successors, (56262), 16783 states have internal predecessors, (56262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:17,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16784 states to 16784 states and 56262 transitions. [2021-06-05 23:07:17,440 INFO L78 Accepts]: Start accepts. Automaton has 16784 states and 56262 transitions. Word has length 54 [2021-06-05 23:07:17,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:17,440 INFO L482 AbstractCegarLoop]: Abstraction has 16784 states and 56262 transitions. [2021-06-05 23:07:17,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:17,440 INFO L276 IsEmpty]: Start isEmpty. Operand 16784 states and 56262 transitions. [2021-06-05 23:07:17,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:07:17,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:17,462 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:17,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:17,662 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:17,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:17,662 INFO L82 PathProgramCache]: Analyzing trace with hash 770927037, now seen corresponding path program 48 times [2021-06-05 23:07:17,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:17,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340773966] [2021-06-05 23:07:17,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:07:18,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:18,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340773966] [2021-06-05 23:07:18,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340773966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:18,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21202991] [2021-06-05 23:07:18,042 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:18,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:07:18,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:18,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:07:18,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:18,635 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:07:18,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:07:18,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:07:18,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:07:18,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:07:18,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 23:07:18,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:18,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:18,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:18,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:07:18,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:07:18,841 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 36 treesize of output 18 [2021-06-05 23:07:18,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:07:18,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:07:18,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:07:18,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-06-05 23:07:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:18,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21202991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:18,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:18,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 23:07:18,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940298192] [2021-06-05 23:07:18,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 23:07:18,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:18,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 23:07:18,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1794, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:07:18,924 INFO L87 Difference]: Start difference. First operand 16784 states and 56262 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:31,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:31,286 INFO L93 Difference]: Finished difference Result 91509 states and 308567 transitions. [2021-06-05 23:07:31,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2021-06-05 23:07:31,287 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:07:31,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:31,461 INFO L225 Difference]: With dead ends: 91509 [2021-06-05 23:07:31,461 INFO L226 Difference]: Without dead ends: 90649 [2021-06-05 23:07:31,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23550 ImplicationChecksByTransitivity, 8950.7ms TimeCoverageRelationStatistics Valid=5558, Invalid=55204, Unknown=0, NotChecked=0, Total=60762 [2021-06-05 23:07:31,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90649 states. [2021-06-05 23:07:32,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90649 to 17604. [2021-06-05 23:07:32,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17604 states, 17603 states have (on average 3.3469295006532978) internal successors, (58916), 17603 states have internal predecessors, (58916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17604 states to 17604 states and 58916 transitions. [2021-06-05 23:07:32,147 INFO L78 Accepts]: Start accepts. Automaton has 17604 states and 58916 transitions. Word has length 54 [2021-06-05 23:07:32,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:32,147 INFO L482 AbstractCegarLoop]: Abstraction has 17604 states and 58916 transitions. [2021-06-05 23:07:32,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:32,147 INFO L276 IsEmpty]: Start isEmpty. Operand 17604 states and 58916 transitions. [2021-06-05 23:07:32,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:07:32,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:32,169 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:32,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 23:07:32,370 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:32,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:32,370 INFO L82 PathProgramCache]: Analyzing trace with hash -347938093, now seen corresponding path program 49 times [2021-06-05 23:07:32,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:32,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274797815] [2021-06-05 23:07:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:07:32,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:32,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274797815] [2021-06-05 23:07:32,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274797815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:32,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662080779] [2021-06-05 23:07:32,720 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:32,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:07:32,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:33,317 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:07:33,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:07:33,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:07:33,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:07:33,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:07:33,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 23:07:33,468 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:07:33,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:07:33,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:07:33,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:07:33,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:07:33,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:07:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:33,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662080779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:33,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:33,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 23:07:33,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100065235] [2021-06-05 23:07:33,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 23:07:33,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:33,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 23:07:33,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1790, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:07:33,547 INFO L87 Difference]: Start difference. First operand 17604 states and 58916 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:44,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:44,035 INFO L93 Difference]: Finished difference Result 77944 states and 263222 transitions. [2021-06-05 23:07:44,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2021-06-05 23:07:44,035 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:07:44,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:44,178 INFO L225 Difference]: With dead ends: 77944 [2021-06-05 23:07:44,179 INFO L226 Difference]: Without dead ends: 77094 [2021-06-05 23:07:44,182 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18674 ImplicationChecksByTransitivity, 8286.4ms TimeCoverageRelationStatistics Valid=5058, Invalid=44004, Unknown=0, NotChecked=0, Total=49062 [2021-06-05 23:07:44,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77094 states. [2021-06-05 23:07:44,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77094 to 18339. [2021-06-05 23:07:44,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18339 states, 18338 states have (on average 3.3434943832479007) internal successors, (61313), 18338 states have internal predecessors, (61313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:44,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18339 states to 18339 states and 61313 transitions. [2021-06-05 23:07:44,877 INFO L78 Accepts]: Start accepts. Automaton has 18339 states and 61313 transitions. Word has length 54 [2021-06-05 23:07:44,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:44,877 INFO L482 AbstractCegarLoop]: Abstraction has 18339 states and 61313 transitions. [2021-06-05 23:07:44,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:44,877 INFO L276 IsEmpty]: Start isEmpty. Operand 18339 states and 61313 transitions. [2021-06-05 23:07:44,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:07:44,900 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:44,900 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:45,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:45,100 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:45,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:45,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1720996819, now seen corresponding path program 50 times [2021-06-05 23:07:45,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:45,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140142408] [2021-06-05 23:07:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:07:45,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:45,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140142408] [2021-06-05 23:07:45,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140142408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:45,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048278184] [2021-06-05 23:07:45,447 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:45,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:07:45,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:45,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:07:45,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:46,016 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:07:46,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:07:46,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:07:46,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:07:46,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:07:46,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 23:07:46,186 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:07:46,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:07:46,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:07:46,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:07:46,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:07:46,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:07:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:46,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048278184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:46,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:46,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 23:07:46,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839878001] [2021-06-05 23:07:46,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 23:07:46,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:46,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 23:07:46,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1880, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:07:46,263 INFO L87 Difference]: Start difference. First operand 18339 states and 61313 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:56,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:07:56,823 INFO L93 Difference]: Finished difference Result 91695 states and 308842 transitions. [2021-06-05 23:07:56,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-06-05 23:07:56,823 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:07:56,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:07:56,997 INFO L225 Difference]: With dead ends: 91695 [2021-06-05 23:07:56,997 INFO L226 Difference]: Without dead ends: 90875 [2021-06-05 23:07:57,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20016 ImplicationChecksByTransitivity, 7696.5ms TimeCoverageRelationStatistics Valid=4724, Invalid=48406, Unknown=0, NotChecked=0, Total=53130 [2021-06-05 23:07:57,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90875 states. [2021-06-05 23:07:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90875 to 18867. [2021-06-05 23:07:57,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18867 states, 18866 states have (on average 3.336319304569066) internal successors, (62943), 18866 states have internal predecessors, (62943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18867 states to 18867 states and 62943 transitions. [2021-06-05 23:07:57,818 INFO L78 Accepts]: Start accepts. Automaton has 18867 states and 62943 transitions. Word has length 54 [2021-06-05 23:07:57,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:07:57,818 INFO L482 AbstractCegarLoop]: Abstraction has 18867 states and 62943 transitions. [2021-06-05 23:07:57,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:07:57,818 INFO L276 IsEmpty]: Start isEmpty. Operand 18867 states and 62943 transitions. [2021-06-05 23:07:57,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:07:57,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:07:57,842 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:07:58,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:58,047 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:07:58,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:07:58,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1213673013, now seen corresponding path program 51 times [2021-06-05 23:07:58,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:07:58,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802943028] [2021-06-05 23:07:58,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:07:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:07:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:07:58,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:07:58,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802943028] [2021-06-05 23:07:58,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802943028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:58,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083731597] [2021-06-05 23:07:58,376 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:07:58,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:07:58,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:07:58,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 23:07:58,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:07:58,929 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:07:58,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:07:58,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:07:58,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:07:58,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:07:58,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 23:07:59,113 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:07:59,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:07:59,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:07:59,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:07:59,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:07:59,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:07:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:07:59,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083731597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:07:59,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:07:59,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 23:07:59,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049182747] [2021-06-05 23:07:59,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 23:07:59,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:07:59,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 23:07:59,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1879, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:07:59,194 INFO L87 Difference]: Start difference. First operand 18867 states and 62943 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:04,423 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 23:08:12,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:12,460 INFO L93 Difference]: Finished difference Result 116913 states and 393329 transitions. [2021-06-05 23:08:12,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2021-06-05 23:08:12,460 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:08:12,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:12,707 INFO L225 Difference]: With dead ends: 116913 [2021-06-05 23:08:12,707 INFO L226 Difference]: Without dead ends: 116083 [2021-06-05 23:08:12,709 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29781 ImplicationChecksByTransitivity, 10315.3ms TimeCoverageRelationStatistics Valid=6740, Invalid=69160, Unknown=0, NotChecked=0, Total=75900 [2021-06-05 23:08:12,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116083 states. [2021-06-05 23:08:13,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116083 to 20115. [2021-06-05 23:08:13,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20115 states, 20114 states have (on average 3.33016804215969) internal successors, (66983), 20114 states have internal predecessors, (66983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:13,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20115 states to 20115 states and 66983 transitions. [2021-06-05 23:08:13,543 INFO L78 Accepts]: Start accepts. Automaton has 20115 states and 66983 transitions. Word has length 54 [2021-06-05 23:08:13,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:13,543 INFO L482 AbstractCegarLoop]: Abstraction has 20115 states and 66983 transitions. [2021-06-05 23:08:13,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:13,544 INFO L276 IsEmpty]: Start isEmpty. Operand 20115 states and 66983 transitions. [2021-06-05 23:08:13,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:08:13,568 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:13,568 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:13,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 23:08:13,769 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:13,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:13,769 INFO L82 PathProgramCache]: Analyzing trace with hash 295594003, now seen corresponding path program 52 times [2021-06-05 23:08:13,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:13,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572404523] [2021-06-05 23:08:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:08:14,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:14,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572404523] [2021-06-05 23:08:14,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572404523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:14,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517805378] [2021-06-05 23:08:14,124 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:14,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:08:14,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:14,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:08:14,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:14,667 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:08:14,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 23:08:14,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:08:14,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:08:14,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:08:14,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 23:08:14,833 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:08:14,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:08:14,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:08:14,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:08:14,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:08:14,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:08:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:14,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517805378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:14,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:14,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 23:08:14,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745369415] [2021-06-05 23:08:14,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 23:08:14,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:14,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 23:08:14,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1880, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:08:14,911 INFO L87 Difference]: Start difference. First operand 20115 states and 66983 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:18,609 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-05 23:08:29,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:29,346 INFO L93 Difference]: Finished difference Result 124269 states and 417429 transitions. [2021-06-05 23:08:29,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-06-05 23:08:29,346 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:08:29,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:29,607 INFO L225 Difference]: With dead ends: 124269 [2021-06-05 23:08:29,607 INFO L226 Difference]: Without dead ends: 122609 [2021-06-05 23:08:29,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28590 ImplicationChecksByTransitivity, 11041.9ms TimeCoverageRelationStatistics Valid=6899, Invalid=66271, Unknown=0, NotChecked=0, Total=73170 [2021-06-05 23:08:29,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122609 states. [2021-06-05 23:08:30,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122609 to 21964. [2021-06-05 23:08:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21964 states, 21963 states have (on average 3.322087146564677) internal successors, (72963), 21963 states have internal predecessors, (72963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:30,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21964 states to 21964 states and 72963 transitions. [2021-06-05 23:08:30,627 INFO L78 Accepts]: Start accepts. Automaton has 21964 states and 72963 transitions. Word has length 54 [2021-06-05 23:08:30,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:30,627 INFO L482 AbstractCegarLoop]: Abstraction has 21964 states and 72963 transitions. [2021-06-05 23:08:30,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:30,627 INFO L276 IsEmpty]: Start isEmpty. Operand 21964 states and 72963 transitions. [2021-06-05 23:08:30,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:08:30,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:30,655 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:30,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 23:08:30,855 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:30,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:30,856 INFO L82 PathProgramCache]: Analyzing trace with hash 350486487, now seen corresponding path program 53 times [2021-06-05 23:08:30,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:30,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968874234] [2021-06-05 23:08:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:08:31,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:31,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968874234] [2021-06-05 23:08:31,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968874234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:31,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180635188] [2021-06-05 23:08:31,192 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:31,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:08:31,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:31,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 23:08:31,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:31,816 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:08:31,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:08:31,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:08:31,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:08:31,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:08:31,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-06-05 23:08:31,906 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:08:31,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:08:31,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:08:31,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:08:31,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:08:31,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:08:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:31,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180635188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:31,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:31,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 23:08:31,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756948255] [2021-06-05 23:08:31,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 23:08:31,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:31,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 23:08:31,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:08:31,983 INFO L87 Difference]: Start difference. First operand 21964 states and 72963 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:39,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:39,269 INFO L93 Difference]: Finished difference Result 69919 states and 235479 transitions. [2021-06-05 23:08:39,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-06-05 23:08:39,269 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:08:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:39,400 INFO L225 Difference]: With dead ends: 69919 [2021-06-05 23:08:39,400 INFO L226 Difference]: Without dead ends: 68859 [2021-06-05 23:08:39,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11074 ImplicationChecksByTransitivity, 5585.9ms TimeCoverageRelationStatistics Valid=3234, Invalid=27918, Unknown=0, NotChecked=0, Total=31152 [2021-06-05 23:08:39,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68859 states. [2021-06-05 23:08:39,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68859 to 22062. [2021-06-05 23:08:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22062 states, 22061 states have (on average 3.3209736639318255) internal successors, (73264), 22061 states have internal predecessors, (73264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:40,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22062 states to 22062 states and 73264 transitions. [2021-06-05 23:08:40,001 INFO L78 Accepts]: Start accepts. Automaton has 22062 states and 73264 transitions. Word has length 54 [2021-06-05 23:08:40,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:40,001 INFO L482 AbstractCegarLoop]: Abstraction has 22062 states and 73264 transitions. [2021-06-05 23:08:40,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:40,001 INFO L276 IsEmpty]: Start isEmpty. Operand 22062 states and 73264 transitions. [2021-06-05 23:08:40,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:08:40,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:40,030 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:40,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:40,230 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:40,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:40,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1417516959, now seen corresponding path program 54 times [2021-06-05 23:08:40,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:40,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5983174] [2021-06-05 23:08:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:08:40,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:40,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5983174] [2021-06-05 23:08:40,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5983174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:40,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140045294] [2021-06-05 23:08:40,533 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:40,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:08:40,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:08:40,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:08:40,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:41,124 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:08:41,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:08:41,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:08:41,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:08:41,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:08:41,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 23:08:41,245 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:08:41,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:08:41,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:08:41,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:08:41,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:08:41,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:08:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:41,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140045294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:41,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:41,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 23:08:41,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094570672] [2021-06-05 23:08:41,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:08:41,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:41,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:08:41,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1612, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:08:41,324 INFO L87 Difference]: Start difference. First operand 22062 states and 73264 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:43,944 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-06-05 23:08:53,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:08:53,729 INFO L93 Difference]: Finished difference Result 150720 states and 516372 transitions. [2021-06-05 23:08:53,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-06-05 23:08:53,729 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:08:53,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:08:54,051 INFO L225 Difference]: With dead ends: 150720 [2021-06-05 23:08:54,051 INFO L226 Difference]: Without dead ends: 145955 [2021-06-05 23:08:54,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28507 ImplicationChecksByTransitivity, 9769.3ms TimeCoverageRelationStatistics Valid=7069, Invalid=62891, Unknown=0, NotChecked=0, Total=69960 [2021-06-05 23:08:54,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145955 states. [2021-06-05 23:08:55,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145955 to 25238. [2021-06-05 23:08:55,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25238 states, 25237 states have (on average 3.303245235170583) internal successors, (83364), 25237 states have internal predecessors, (83364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:55,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25238 states to 25238 states and 83364 transitions. [2021-06-05 23:08:55,213 INFO L78 Accepts]: Start accepts. Automaton has 25238 states and 83364 transitions. Word has length 54 [2021-06-05 23:08:55,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:08:55,213 INFO L482 AbstractCegarLoop]: Abstraction has 25238 states and 83364 transitions. [2021-06-05 23:08:55,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:08:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 25238 states and 83364 transitions. [2021-06-05 23:08:55,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:08:55,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:08:55,246 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:08:55,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 23:08:55,446 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:08:55,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:08:55,446 INFO L82 PathProgramCache]: Analyzing trace with hash 668210515, now seen corresponding path program 55 times [2021-06-05 23:08:55,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:08:55,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905964638] [2021-06-05 23:08:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:08:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 23:08:55,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:08:55,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905964638] [2021-06-05 23:08:55,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905964638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:55,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334290167] [2021-06-05 23:08:55,772 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:08:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:08:55,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:08:55,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:08:56,787 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:08:56,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 23:08:56,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:08:56,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:08:56,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:08:56,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 23:08:56,941 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:08:56,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:08:56,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:08:56,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:08:56,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:08:56,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:08:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:08:57,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334290167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:08:57,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:08:57,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-06-05 23:08:57,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065931793] [2021-06-05 23:08:57,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 23:08:57,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:08:57,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 23:08:57,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1700, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:08:57,013 INFO L87 Difference]: Start difference. First operand 25238 states and 83364 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:07,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:07,535 INFO L93 Difference]: Finished difference Result 105434 states and 354160 transitions. [2021-06-05 23:09:07,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-06-05 23:09:07,535 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:09:07,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:07,759 INFO L225 Difference]: With dead ends: 105434 [2021-06-05 23:09:07,760 INFO L226 Difference]: Without dead ends: 104584 [2021-06-05 23:09:07,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23552 ImplicationChecksByTransitivity, 8718.1ms TimeCoverageRelationStatistics Valid=5754, Invalid=53538, Unknown=0, NotChecked=0, Total=59292 [2021-06-05 23:09:07,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104584 states. [2021-06-05 23:09:08,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104584 to 26860. [2021-06-05 23:09:08,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26860 states, 26859 states have (on average 3.29863360512305) internal successors, (88598), 26859 states have internal predecessors, (88598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:08,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26860 states to 26860 states and 88598 transitions. [2021-06-05 23:09:08,905 INFO L78 Accepts]: Start accepts. Automaton has 26860 states and 88598 transitions. Word has length 54 [2021-06-05 23:09:08,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:08,905 INFO L482 AbstractCegarLoop]: Abstraction has 26860 states and 88598 transitions. [2021-06-05 23:09:08,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:08,905 INFO L276 IsEmpty]: Start isEmpty. Operand 26860 states and 88598 transitions. [2021-06-05 23:09:08,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:09:08,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:08,944 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:09,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 23:09:09,149 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:09,149 INFO L82 PathProgramCache]: Analyzing trace with hash 160886709, now seen corresponding path program 56 times [2021-06-05 23:09:09,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:09,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986743159] [2021-06-05 23:09:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:09,337 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-06-05 23:09:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 23:09:09,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:09,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986743159] [2021-06-05 23:09:09,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986743159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:09,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082853161] [2021-06-05 23:09:09,611 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:09,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:09:09,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:09,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:09:09,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:10,167 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:09:10,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:09:10,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:09:10,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:09:10,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:09:10,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 23:09:10,329 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:09:10,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:09:10,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:09:10,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:09:10,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:09:10,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:09:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:10,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082853161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:10,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:10,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-06-05 23:09:10,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887325886] [2021-06-05 23:09:10,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 23:09:10,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:10,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 23:09:10,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:09:10,403 INFO L87 Difference]: Start difference. First operand 26860 states and 88598 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:23,991 INFO L93 Difference]: Finished difference Result 130379 states and 438439 transitions. [2021-06-05 23:09:23,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2021-06-05 23:09:23,991 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:09:23,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:24,386 INFO L225 Difference]: With dead ends: 130379 [2021-06-05 23:09:24,387 INFO L226 Difference]: Without dead ends: 129369 [2021-06-05 23:09:24,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31329 ImplicationChecksByTransitivity, 10775.1ms TimeCoverageRelationStatistics Valid=7681, Invalid=69325, Unknown=0, NotChecked=0, Total=77006 [2021-06-05 23:09:24,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129369 states. [2021-06-05 23:09:25,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129369 to 27396. [2021-06-05 23:09:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27396 states, 27395 states have (on average 3.301770396057675) internal successors, (90452), 27395 states have internal predecessors, (90452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:25,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27396 states to 27396 states and 90452 transitions. [2021-06-05 23:09:25,564 INFO L78 Accepts]: Start accepts. Automaton has 27396 states and 90452 transitions. Word has length 54 [2021-06-05 23:09:25,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:25,564 INFO L482 AbstractCegarLoop]: Abstraction has 27396 states and 90452 transitions. [2021-06-05 23:09:25,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:25,565 INFO L276 IsEmpty]: Start isEmpty. Operand 27396 states and 90452 transitions. [2021-06-05 23:09:25,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:09:25,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:25,616 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:25,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:25,818 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:25,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:25,819 INFO L82 PathProgramCache]: Analyzing trace with hash -757192301, now seen corresponding path program 57 times [2021-06-05 23:09:25,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:25,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759669005] [2021-06-05 23:09:25,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 23:09:26,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:26,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759669005] [2021-06-05 23:09:26,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759669005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:26,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127154988] [2021-06-05 23:09:26,164 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:26,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:09:26,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:26,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 23:09:26,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:26,891 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:09:26,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 23:09:26,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:09:26,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:09:26,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:09:26,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 23:09:27,060 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:09:27,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:09:27,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:09:27,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:09:27,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:09:27,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:09:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:27,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127154988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:27,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:27,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-06-05 23:09:27,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479147854] [2021-06-05 23:09:27,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 23:09:27,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:27,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 23:09:27,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1702, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:09:27,140 INFO L87 Difference]: Start difference. First operand 27396 states and 90452 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:09:43,268 INFO L93 Difference]: Finished difference Result 144390 states and 485662 transitions. [2021-06-05 23:09:43,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2021-06-05 23:09:43,268 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:09:43,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:09:43,567 INFO L225 Difference]: With dead ends: 144390 [2021-06-05 23:09:43,568 INFO L226 Difference]: Without dead ends: 142820 [2021-06-05 23:09:43,571 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42255 ImplicationChecksByTransitivity, 13086.5ms TimeCoverageRelationStatistics Valid=9725, Invalid=90447, Unknown=0, NotChecked=0, Total=100172 [2021-06-05 23:09:43,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142820 states. [2021-06-05 23:09:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142820 to 27718. [2021-06-05 23:09:45,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27718 states, 27717 states have (on average 3.300285023631706) internal successors, (91474), 27717 states have internal predecessors, (91474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:45,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27718 states to 27718 states and 91474 transitions. [2021-06-05 23:09:45,086 INFO L78 Accepts]: Start accepts. Automaton has 27718 states and 91474 transitions. Word has length 54 [2021-06-05 23:09:45,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:09:45,086 INFO L482 AbstractCegarLoop]: Abstraction has 27718 states and 91474 transitions. [2021-06-05 23:09:45,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:09:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 27718 states and 91474 transitions. [2021-06-05 23:09:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:09:45,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:09:45,125 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:09:45,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:45,325 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:09:45,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:09:45,325 INFO L82 PathProgramCache]: Analyzing trace with hash -450654615, now seen corresponding path program 58 times [2021-06-05 23:09:45,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:09:45,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496615621] [2021-06-05 23:09:45,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:09:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:09:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 23:09:45,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:09:45,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496615621] [2021-06-05 23:09:45,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496615621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:45,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958458057] [2021-06-05 23:09:45,637 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:09:45,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:09:45,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:09:45,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:09:45,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:09:46,227 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:09:46,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:09:46,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:09:46,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:09:46,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:09:46,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 23:09:46,466 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:09:46,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:09:46,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:09:46,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:09:46,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:09:46,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:09:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:09:46,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958458057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:09:46,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:09:46,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-06-05 23:09:46,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579773825] [2021-06-05 23:09:46,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 23:09:46,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:09:46,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 23:09:46,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:09:46,540 INFO L87 Difference]: Start difference. First operand 27718 states and 91474 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:00,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:00,102 INFO L93 Difference]: Finished difference Result 126027 states and 422969 transitions. [2021-06-05 23:10:00,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-06-05 23:10:00,102 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:10:00,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:00,358 INFO L225 Difference]: With dead ends: 126027 [2021-06-05 23:10:00,358 INFO L226 Difference]: Without dead ends: 125012 [2021-06-05 23:10:00,360 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29154 ImplicationChecksByTransitivity, 10107.4ms TimeCoverageRelationStatistics Valid=7000, Invalid=65092, Unknown=0, NotChecked=0, Total=72092 [2021-06-05 23:10:00,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125012 states. [2021-06-05 23:10:01,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125012 to 27184. [2021-06-05 23:10:01,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27184 states, 27183 states have (on average 3.2973181768016775) internal successors, (89631), 27183 states have internal predecessors, (89631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:01,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27184 states to 27184 states and 89631 transitions. [2021-06-05 23:10:01,339 INFO L78 Accepts]: Start accepts. Automaton has 27184 states and 89631 transitions. Word has length 54 [2021-06-05 23:10:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:01,340 INFO L482 AbstractCegarLoop]: Abstraction has 27184 states and 89631 transitions. [2021-06-05 23:10:01,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:01,340 INFO L276 IsEmpty]: Start isEmpty. Operand 27184 states and 89631 transitions. [2021-06-05 23:10:01,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:10:01,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:01,602 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:01,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 23:10:01,813 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:01,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:01,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1368733625, now seen corresponding path program 59 times [2021-06-05 23:10:01,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:01,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740211757] [2021-06-05 23:10:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 23:10:02,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:02,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740211757] [2021-06-05 23:10:02,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740211757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:02,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989088687] [2021-06-05 23:10:02,132 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:02,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:10:02,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:02,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:10:02,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:02,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:02,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:02,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:02,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:02,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:02,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:02,922 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 51 treesize of output 31 [2021-06-05 23:10:02,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:02,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:02,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:10:02,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:38 [2021-06-05 23:10:03,052 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:10:03,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:10:03,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:03,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:03,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:10:03,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:10:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:03,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989088687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:03,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:03,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-06-05 23:10:03,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136063449] [2021-06-05 23:10:03,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 23:10:03,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:03,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 23:10:03,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1701, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:10:03,128 INFO L87 Difference]: Start difference. First operand 27184 states and 89631 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:19,183 INFO L93 Difference]: Finished difference Result 132631 states and 444905 transitions. [2021-06-05 23:10:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2021-06-05 23:10:19,184 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:10:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:19,624 INFO L225 Difference]: With dead ends: 132631 [2021-06-05 23:10:19,624 INFO L226 Difference]: Without dead ends: 131761 [2021-06-05 23:10:19,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39131 ImplicationChecksByTransitivity, 12725.7ms TimeCoverageRelationStatistics Valid=9142, Invalid=84188, Unknown=0, NotChecked=0, Total=93330 [2021-06-05 23:10:19,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131761 states. [2021-06-05 23:10:20,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131761 to 26238. [2021-06-05 23:10:20,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26238 states, 26237 states have (on average 3.297976140564851) internal successors, (86529), 26237 states have internal predecessors, (86529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26238 states to 26238 states and 86529 transitions. [2021-06-05 23:10:21,029 INFO L78 Accepts]: Start accepts. Automaton has 26238 states and 86529 transitions. Word has length 54 [2021-06-05 23:10:21,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:21,029 INFO L482 AbstractCegarLoop]: Abstraction has 26238 states and 86529 transitions. [2021-06-05 23:10:21,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:21,030 INFO L276 IsEmpty]: Start isEmpty. Operand 26238 states and 86529 transitions. [2021-06-05 23:10:21,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:10:21,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:21,065 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:21,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:21,266 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:21,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:21,266 INFO L82 PathProgramCache]: Analyzing trace with hash -702299817, now seen corresponding path program 60 times [2021-06-05 23:10:21,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:21,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857623403] [2021-06-05 23:10:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 23:10:21,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:21,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857623403] [2021-06-05 23:10:21,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857623403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:21,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532760133] [2021-06-05 23:10:21,583 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:21,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:10:21,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:21,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:10:21,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:22,303 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:10:22,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:10:22,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:22,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:22,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:10:22,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-06-05 23:10:22,395 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:10:22,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:10:22,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:22,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:22,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:10:22,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:10:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:22,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532760133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:22,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:22,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-06-05 23:10:22,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819267269] [2021-06-05 23:10:22,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 23:10:22,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:22,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 23:10:22,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1703, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:10:22,472 INFO L87 Difference]: Start difference. First operand 26238 states and 86529 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:34,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:34,902 INFO L93 Difference]: Finished difference Result 108205 states and 362412 transitions. [2021-06-05 23:10:34,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2021-06-05 23:10:34,903 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:10:34,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:35,136 INFO L225 Difference]: With dead ends: 108205 [2021-06-05 23:10:35,136 INFO L226 Difference]: Without dead ends: 106791 [2021-06-05 23:10:35,138 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26754 ImplicationChecksByTransitivity, 9821.6ms TimeCoverageRelationStatistics Valid=6587, Invalid=60235, Unknown=0, NotChecked=0, Total=66822 [2021-06-05 23:10:35,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106791 states. [2021-06-05 23:10:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106791 to 23572. [2021-06-05 23:10:35,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23572 states, 23571 states have (on average 3.3202240040728013) internal successors, (78261), 23571 states have internal predecessors, (78261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:35,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23572 states to 23572 states and 78261 transitions. [2021-06-05 23:10:35,974 INFO L78 Accepts]: Start accepts. Automaton has 23572 states and 78261 transitions. Word has length 54 [2021-06-05 23:10:35,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:35,974 INFO L482 AbstractCegarLoop]: Abstraction has 23572 states and 78261 transitions. [2021-06-05 23:10:35,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:35,974 INFO L276 IsEmpty]: Start isEmpty. Operand 23572 states and 78261 transitions. [2021-06-05 23:10:36,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:10:36,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:36,002 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:36,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:36,203 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:36,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:36,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1274429673, now seen corresponding path program 61 times [2021-06-05 23:10:36,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:36,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429217522] [2021-06-05 23:10:36,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:36,572 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2021-06-05 23:10:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:10:36,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:36,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429217522] [2021-06-05 23:10:36,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429217522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:36,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708700753] [2021-06-05 23:10:36,778 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:36,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:10:36,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:37,332 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:10:37,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:10:37,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:37,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:37,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:10:37,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 23:10:37,495 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:10:37,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:10:37,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:37,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:37,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:10:37,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:10:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:37,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708700753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:37,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:37,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 23:10:37,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630043481] [2021-06-05 23:10:37,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 23:10:37,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:37,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 23:10:37,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:10:37,572 INFO L87 Difference]: Start difference. First operand 23572 states and 78261 transitions. Second operand has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:49,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:49,071 INFO L93 Difference]: Finished difference Result 101893 states and 342921 transitions. [2021-06-05 23:10:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-06-05 23:10:49,071 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:10:49,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:49,284 INFO L225 Difference]: With dead ends: 101893 [2021-06-05 23:10:49,284 INFO L226 Difference]: Without dead ends: 101033 [2021-06-05 23:10:49,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23364 ImplicationChecksByTransitivity, 8949.7ms TimeCoverageRelationStatistics Valid=5536, Invalid=54734, Unknown=0, NotChecked=0, Total=60270 [2021-06-05 23:10:49,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101033 states. [2021-06-05 23:10:50,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101033 to 23904. [2021-06-05 23:10:50,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23904 states, 23903 states have (on average 3.316487470192026) internal successors, (79274), 23903 states have internal predecessors, (79274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23904 states to 23904 states and 79274 transitions. [2021-06-05 23:10:50,208 INFO L78 Accepts]: Start accepts. Automaton has 23904 states and 79274 transitions. Word has length 54 [2021-06-05 23:10:50,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:50,208 INFO L482 AbstractCegarLoop]: Abstraction has 23904 states and 79274 transitions. [2021-06-05 23:10:50,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:50,208 INFO L276 IsEmpty]: Start isEmpty. Operand 23904 states and 79274 transitions. [2021-06-05 23:10:50,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:10:50,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:50,237 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:50,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:50,437 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:50,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:50,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1901672493, now seen corresponding path program 62 times [2021-06-05 23:10:50,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:50,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905843528] [2021-06-05 23:10:50,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:10:50,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:50,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905843528] [2021-06-05 23:10:50,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905843528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:50,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488746530] [2021-06-05 23:10:50,776 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:50,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:10:50,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:50,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:10:50,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:51,384 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:10:51,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:10:51,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:51,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:51,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:10:51,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 23:10:51,517 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:10:51,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:10:51,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:51,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:51,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:10:51,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:10:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:10:51,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488746530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:51,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:51,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 23:10:51,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733710950] [2021-06-05 23:10:51,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 23:10:51,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:51,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 23:10:51,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1872, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:10:51,592 INFO L87 Difference]: Start difference. First operand 23904 states and 79274 transitions. Second operand has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:10:52,533 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-06-05 23:11:03,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:03,303 INFO L93 Difference]: Finished difference Result 91780 states and 309030 transitions. [2021-06-05 23:11:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-06-05 23:11:03,303 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:11:03,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:03,481 INFO L225 Difference]: With dead ends: 91780 [2021-06-05 23:11:03,482 INFO L226 Difference]: Without dead ends: 90930 [2021-06-05 23:11:03,484 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22028 ImplicationChecksByTransitivity, 9620.6ms TimeCoverageRelationStatistics Valid=5784, Invalid=51576, Unknown=0, NotChecked=0, Total=57360 [2021-06-05 23:11:03,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90930 states. [2021-06-05 23:11:04,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90930 to 23990. [2021-06-05 23:11:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23990 states, 23989 states have (on average 3.311601150527325) internal successors, (79442), 23989 states have internal predecessors, (79442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:04,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23990 states to 23990 states and 79442 transitions. [2021-06-05 23:11:04,294 INFO L78 Accepts]: Start accepts. Automaton has 23990 states and 79442 transitions. Word has length 54 [2021-06-05 23:11:04,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:04,294 INFO L482 AbstractCegarLoop]: Abstraction has 23990 states and 79442 transitions. [2021-06-05 23:11:04,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:04,294 INFO L276 IsEmpty]: Start isEmpty. Operand 23990 states and 79442 transitions. [2021-06-05 23:11:04,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:11:04,325 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:04,325 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:04,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 23:11:04,525 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:04,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:04,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1703119415, now seen corresponding path program 63 times [2021-06-05 23:11:04,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:04,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424529242] [2021-06-05 23:11:04,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 23:11:04,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:04,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424529242] [2021-06-05 23:11:04,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424529242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:04,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724069889] [2021-06-05 23:11:04,863 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:04,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:11:04,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:04,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 23:11:04,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:05,501 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:11:05,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:11:05,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:05,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:05,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:05,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-06-05 23:11:05,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:05,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:05,608 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 38 treesize of output 18 [2021-06-05 23:11:05,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:05,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:05,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:05,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-06-05 23:11:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:05,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724069889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:05,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:05,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 23:11:05,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602310185] [2021-06-05 23:11:05,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:11:05,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:05,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:11:05,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1637, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:11:05,687 INFO L87 Difference]: Start difference. First operand 23990 states and 79442 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:10,285 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 23:11:19,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:19,050 INFO L93 Difference]: Finished difference Result 83749 states and 282555 transitions. [2021-06-05 23:11:19,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2021-06-05 23:11:19,051 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:11:19,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:19,315 INFO L225 Difference]: With dead ends: 83749 [2021-06-05 23:11:19,315 INFO L226 Difference]: Without dead ends: 79687 [2021-06-05 23:11:19,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22824 ImplicationChecksByTransitivity, 10285.6ms TimeCoverageRelationStatistics Valid=5842, Invalid=52480, Unknown=0, NotChecked=0, Total=58322 [2021-06-05 23:11:19,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79687 states. [2021-06-05 23:11:19,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79687 to 24522. [2021-06-05 23:11:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24522 states, 24521 states have (on average 3.308837323110803) internal successors, (81136), 24521 states have internal predecessors, (81136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:19,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24522 states to 24522 states and 81136 transitions. [2021-06-05 23:11:19,982 INFO L78 Accepts]: Start accepts. Automaton has 24522 states and 81136 transitions. Word has length 54 [2021-06-05 23:11:19,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:19,982 INFO L482 AbstractCegarLoop]: Abstraction has 24522 states and 81136 transitions. [2021-06-05 23:11:19,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:19,982 INFO L276 IsEmpty]: Start isEmpty. Operand 24522 states and 81136 transitions. [2021-06-05 23:11:20,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:11:20,014 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:20,014 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:20,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:20,214 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:20,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:20,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1112434429, now seen corresponding path program 64 times [2021-06-05 23:11:20,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:20,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000143237] [2021-06-05 23:11:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:11:20,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:20,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000143237] [2021-06-05 23:11:20,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000143237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:20,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746153193] [2021-06-05 23:11:20,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:20,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:11:20,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:20,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:11:20,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:21,127 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:11:21,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:11:21,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:21,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:21,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:21,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 23:11:21,285 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:11:21,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:11:21,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:21,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:21,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:21,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:11:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:21,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746153193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:21,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:21,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 23:11:21,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535056800] [2021-06-05 23:11:21,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 23:11:21,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:21,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 23:11:21,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1784, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:11:21,361 INFO L87 Difference]: Start difference. First operand 24522 states and 81136 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:26,470 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-06-05 23:11:32,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:32,820 INFO L93 Difference]: Finished difference Result 94684 states and 318256 transitions. [2021-06-05 23:11:32,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-06-05 23:11:32,820 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:11:32,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:33,001 INFO L225 Difference]: With dead ends: 94684 [2021-06-05 23:11:33,001 INFO L226 Difference]: Without dead ends: 93786 [2021-06-05 23:11:33,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22145 ImplicationChecksByTransitivity, 8719.7ms TimeCoverageRelationStatistics Valid=5306, Invalid=51576, Unknown=0, NotChecked=0, Total=56882 [2021-06-05 23:11:33,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93786 states. [2021-06-05 23:11:33,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93786 to 25118. [2021-06-05 23:11:33,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25118 states, 25117 states have (on average 3.3056495600589244) internal successors, (83028), 25117 states have internal predecessors, (83028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:33,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25118 states to 25118 states and 83028 transitions. [2021-06-05 23:11:33,849 INFO L78 Accepts]: Start accepts. Automaton has 25118 states and 83028 transitions. Word has length 54 [2021-06-05 23:11:33,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:33,849 INFO L482 AbstractCegarLoop]: Abstraction has 25118 states and 83028 transitions. [2021-06-05 23:11:33,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:33,849 INFO L276 IsEmpty]: Start isEmpty. Operand 25118 states and 83028 transitions. [2021-06-05 23:11:33,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:11:33,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:33,883 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:34,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:34,085 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:34,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:34,085 INFO L82 PathProgramCache]: Analyzing trace with hash 605110623, now seen corresponding path program 65 times [2021-06-05 23:11:34,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:34,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132261853] [2021-06-05 23:11:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:11:34,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:34,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132261853] [2021-06-05 23:11:34,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132261853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:34,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111439300] [2021-06-05 23:11:34,438 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:34,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:11:34,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:34,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:11:34,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:35,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:35,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:35,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,224 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 49 treesize of output 29 [2021-06-05 23:11:35,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:35,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:35,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:35,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:31 [2021-06-05 23:11:35,388 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:11:35,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:11:35,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:35,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:35,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:35,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:11:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:35,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111439300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:35,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:35,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 23:11:35,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094429354] [2021-06-05 23:11:35,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 23:11:35,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:35,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 23:11:35,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:11:35,465 INFO L87 Difference]: Start difference. First operand 25118 states and 83028 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:49,157 INFO L93 Difference]: Finished difference Result 115635 states and 388960 transitions. [2021-06-05 23:11:49,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2021-06-05 23:11:49,157 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:11:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:49,408 INFO L225 Difference]: With dead ends: 115635 [2021-06-05 23:11:49,408 INFO L226 Difference]: Without dead ends: 114631 [2021-06-05 23:11:49,411 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29308 ImplicationChecksByTransitivity, 11213.0ms TimeCoverageRelationStatistics Valid=7087, Invalid=66083, Unknown=0, NotChecked=0, Total=73170 [2021-06-05 23:11:49,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114631 states. [2021-06-05 23:11:50,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114631 to 25490. [2021-06-05 23:11:50,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25490 states, 25489 states have (on average 3.3076621287614265) internal successors, (84309), 25489 states have internal predecessors, (84309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:50,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25490 states to 25490 states and 84309 transitions. [2021-06-05 23:11:50,534 INFO L78 Accepts]: Start accepts. Automaton has 25490 states and 84309 transitions. Word has length 54 [2021-06-05 23:11:50,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:50,535 INFO L482 AbstractCegarLoop]: Abstraction has 25490 states and 84309 transitions. [2021-06-05 23:11:50,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:50,535 INFO L276 IsEmpty]: Start isEmpty. Operand 25490 states and 84309 transitions. [2021-06-05 23:11:50,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:11:50,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:50,566 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:50,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 23:11:50,767 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:50,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:50,767 INFO L82 PathProgramCache]: Analyzing trace with hash -312968387, now seen corresponding path program 66 times [2021-06-05 23:11:50,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:50,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475439947] [2021-06-05 23:11:50,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:11:51,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:51,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475439947] [2021-06-05 23:11:51,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475439947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:51,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893417711] [2021-06-05 23:11:51,292 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:51,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:11:51,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:51,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:11:51,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:51,842 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:11:51,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 23:11:51,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:51,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:51,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:51,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 23:11:51,998 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:11:51,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:11:51,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:52,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:52,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:52,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:11:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:52,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893417711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:52,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:52,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 23:11:52,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23144630] [2021-06-05 23:11:52,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 23:11:52,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:52,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 23:11:52,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1786, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:11:52,073 INFO L87 Difference]: Start difference. First operand 25490 states and 84309 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:07,869 INFO L93 Difference]: Finished difference Result 126947 states and 426952 transitions. [2021-06-05 23:12:07,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 269 states. [2021-06-05 23:12:07,870 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:12:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:08,131 INFO L225 Difference]: With dead ends: 126947 [2021-06-05 23:12:08,131 INFO L226 Difference]: Without dead ends: 125608 [2021-06-05 23:12:08,135 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39699 ImplicationChecksByTransitivity, 12964.0ms TimeCoverageRelationStatistics Valid=8842, Invalid=86948, Unknown=0, NotChecked=0, Total=95790 [2021-06-05 23:12:08,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125608 states. [2021-06-05 23:12:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125608 to 25380. [2021-06-05 23:12:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25380 states, 25379 states have (on average 3.307064896174002) internal successors, (83930), 25379 states have internal predecessors, (83930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25380 states to 25380 states and 83930 transitions. [2021-06-05 23:12:09,447 INFO L78 Accepts]: Start accepts. Automaton has 25380 states and 83930 transitions. Word has length 54 [2021-06-05 23:12:09,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:09,447 INFO L482 AbstractCegarLoop]: Abstraction has 25380 states and 83930 transitions. [2021-06-05 23:12:09,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:09,447 INFO L276 IsEmpty]: Start isEmpty. Operand 25380 states and 83930 transitions. [2021-06-05 23:12:09,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:12:09,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:09,478 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:09,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:09,678 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:09,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:09,679 INFO L82 PathProgramCache]: Analyzing trace with hash -6430701, now seen corresponding path program 67 times [2021-06-05 23:12:09,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:09,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895480231] [2021-06-05 23:12:09,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:12:10,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:10,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895480231] [2021-06-05 23:12:10,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895480231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:10,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335445118] [2021-06-05 23:12:10,007 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:10,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:12:10,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:10,598 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:12:10,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:12:10,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:10,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:10,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:10,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 23:12:10,824 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:12:10,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:12:10,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:10,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:10,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:10,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:12:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:10,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335445118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:10,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:10,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 23:12:10,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642014806] [2021-06-05 23:12:10,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 23:12:10,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:10,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 23:12:10,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1782, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:12:10,898 INFO L87 Difference]: Start difference. First operand 25380 states and 83930 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:24,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:24,414 INFO L93 Difference]: Finished difference Result 116033 states and 390273 transitions. [2021-06-05 23:12:24,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2021-06-05 23:12:24,414 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:12:24,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:24,651 INFO L225 Difference]: With dead ends: 116033 [2021-06-05 23:12:24,651 INFO L226 Difference]: Without dead ends: 115155 [2021-06-05 23:12:24,653 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27626 ImplicationChecksByTransitivity, 10121.2ms TimeCoverageRelationStatistics Valid=6490, Invalid=62942, Unknown=0, NotChecked=0, Total=69432 [2021-06-05 23:12:24,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115155 states. [2021-06-05 23:12:25,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115155 to 25374. [2021-06-05 23:12:25,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25374 states, 25373 states have (on average 3.307019272454972) internal successors, (83909), 25373 states have internal predecessors, (83909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:25,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25374 states to 25374 states and 83909 transitions. [2021-06-05 23:12:25,605 INFO L78 Accepts]: Start accepts. Automaton has 25374 states and 83909 transitions. Word has length 54 [2021-06-05 23:12:25,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:25,605 INFO L482 AbstractCegarLoop]: Abstraction has 25374 states and 83909 transitions. [2021-06-05 23:12:25,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:25,605 INFO L276 IsEmpty]: Start isEmpty. Operand 25374 states and 83909 transitions. [2021-06-05 23:12:25,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:12:25,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:25,637 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:25,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:25,838 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:25,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:25,839 INFO L82 PathProgramCache]: Analyzing trace with hash -924509711, now seen corresponding path program 68 times [2021-06-05 23:12:25,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:25,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28861623] [2021-06-05 23:12:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:12:26,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:26,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28861623] [2021-06-05 23:12:26,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28861623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:26,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271093588] [2021-06-05 23:12:26,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:26,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:12:26,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:26,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:12:26,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:27,089 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-05 23:12:27,101 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:12:27,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:12:27,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:27,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:27,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:27,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 23:12:27,226 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:12:27,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:12:27,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:27,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:27,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:27,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:12:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:27,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271093588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:27,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:27,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 23:12:27,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841639821] [2021-06-05 23:12:27,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 23:12:27,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:27,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 23:12:27,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:12:27,303 INFO L87 Difference]: Start difference. First operand 25374 states and 83909 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:42,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:42,543 INFO L93 Difference]: Finished difference Result 120682 states and 405497 transitions. [2021-06-05 23:12:42,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2021-06-05 23:12:42,543 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:12:42,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:42,925 INFO L225 Difference]: With dead ends: 120682 [2021-06-05 23:12:42,925 INFO L226 Difference]: Without dead ends: 119807 [2021-06-05 23:12:42,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37756 ImplicationChecksByTransitivity, 12592.7ms TimeCoverageRelationStatistics Valid=8417, Invalid=83089, Unknown=0, NotChecked=0, Total=91506 [2021-06-05 23:12:43,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119807 states. [2021-06-05 23:12:43,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119807 to 25158. [2021-06-05 23:12:43,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25158 states, 25157 states have (on average 3.305879079381484) internal successors, (83166), 25157 states have internal predecessors, (83166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:43,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25158 states to 25158 states and 83166 transitions. [2021-06-05 23:12:43,962 INFO L78 Accepts]: Start accepts. Automaton has 25158 states and 83166 transitions. Word has length 54 [2021-06-05 23:12:43,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:43,962 INFO L482 AbstractCegarLoop]: Abstraction has 25158 states and 83166 transitions. [2021-06-05 23:12:43,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:43,963 INFO L276 IsEmpty]: Start isEmpty. Operand 25158 states and 83166 transitions. [2021-06-05 23:12:43,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:12:43,992 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:43,992 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:44,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:44,193 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:44,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:44,193 INFO L82 PathProgramCache]: Analyzing trace with hash -258075903, now seen corresponding path program 69 times [2021-06-05 23:12:44,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:44,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899824882] [2021-06-05 23:12:44,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:44,444 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2021-06-05 23:12:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:12:44,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:44,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899824882] [2021-06-05 23:12:44,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899824882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:44,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519166272] [2021-06-05 23:12:44,688 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:44,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:12:44,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:44,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 23:12:44,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:45,315 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:12:45,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:12:45,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:45,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:45,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:45,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-06-05 23:12:45,402 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:12:45,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:12:45,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:45,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:45,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:45,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:12:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:45,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519166272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:45,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:45,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 23:12:45,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795722927] [2021-06-05 23:12:45,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 23:12:45,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:45,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 23:12:45,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:12:45,476 INFO L87 Difference]: Start difference. First operand 25158 states and 83166 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:58,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:58,011 INFO L93 Difference]: Finished difference Result 95640 states and 320302 transitions. [2021-06-05 23:12:58,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2021-06-05 23:12:58,011 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:12:58,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:58,195 INFO L225 Difference]: With dead ends: 95640 [2021-06-05 23:12:58,195 INFO L226 Difference]: Without dead ends: 94430 [2021-06-05 23:12:58,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26277 ImplicationChecksByTransitivity, 9871.4ms TimeCoverageRelationStatistics Valid=6263, Invalid=60043, Unknown=0, NotChecked=0, Total=66306 [2021-06-05 23:12:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94430 states. [2021-06-05 23:12:58,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94430 to 25134. [2021-06-05 23:12:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25134 states, 25133 states have (on average 3.3059324394222735) internal successors, (83088), 25133 states have internal predecessors, (83088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:59,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25134 states to 25134 states and 83088 transitions. [2021-06-05 23:12:59,069 INFO L78 Accepts]: Start accepts. Automaton has 25134 states and 83088 transitions. Word has length 54 [2021-06-05 23:12:59,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:59,069 INFO L482 AbstractCegarLoop]: Abstraction has 25134 states and 83088 transitions. [2021-06-05 23:12:59,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:59,069 INFO L276 IsEmpty]: Start isEmpty. Operand 25134 states and 83088 transitions. [2021-06-05 23:12:59,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:12:59,100 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:59,100 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:59,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 23:12:59,300 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:59,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:59,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1981468115, now seen corresponding path program 70 times [2021-06-05 23:12:59,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:59,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050288301] [2021-06-05 23:12:59,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 23:12:59,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:59,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050288301] [2021-06-05 23:12:59,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050288301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:59,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526445132] [2021-06-05 23:12:59,675 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:59,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:12:59,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:59,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:12:59,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:00,325 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:13:00,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:13:00,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:00,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:00,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:00,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-06-05 23:13:00,410 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:13:00,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:13:00,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:00,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:00,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:00,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:13:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:00,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526445132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:00,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:00,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 23:13:00,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922598668] [2021-06-05 23:13:00,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 23:13:00,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:00,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 23:13:00,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1779, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:13:00,559 INFO L87 Difference]: Start difference. First operand 25134 states and 83088 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:11,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:11,196 INFO L93 Difference]: Finished difference Result 86306 states and 290216 transitions. [2021-06-05 23:13:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2021-06-05 23:13:11,197 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:13:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:11,355 INFO L225 Difference]: With dead ends: 86306 [2021-06-05 23:13:11,355 INFO L226 Difference]: Without dead ends: 82314 [2021-06-05 23:13:11,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19453 ImplicationChecksByTransitivity, 8466.6ms TimeCoverageRelationStatistics Valid=5086, Invalid=44866, Unknown=0, NotChecked=0, Total=49952 [2021-06-05 23:13:11,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82314 states. [2021-06-05 23:13:12,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82314 to 25752. [2021-06-05 23:13:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25752 states, 25751 states have (on average 3.303522193312881) internal successors, (85069), 25751 states have internal predecessors, (85069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:12,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25752 states to 25752 states and 85069 transitions. [2021-06-05 23:13:12,200 INFO L78 Accepts]: Start accepts. Automaton has 25752 states and 85069 transitions. Word has length 54 [2021-06-05 23:13:12,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:12,201 INFO L482 AbstractCegarLoop]: Abstraction has 25752 states and 85069 transitions. [2021-06-05 23:13:12,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:12,201 INFO L276 IsEmpty]: Start isEmpty. Operand 25752 states and 85069 transitions. [2021-06-05 23:13:12,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:13:12,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:12,238 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:12,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 23:13:12,438 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:12,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:12,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1676107171, now seen corresponding path program 71 times [2021-06-05 23:13:12,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:12,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599412679] [2021-06-05 23:13:12,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:13:12,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:12,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599412679] [2021-06-05 23:13:12,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599412679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:12,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859187737] [2021-06-05 23:13:12,811 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:12,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:13:12,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:12,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 23:13:12,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:13,464 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:13:13,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:13:13,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:13,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:13,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:13,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-06-05 23:13:13,550 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:13:13,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:13:13,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:13,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:13,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:13,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:13:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:13,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859187737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:13,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:13,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 23:13:13,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466895699] [2021-06-05 23:13:13,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 23:13:13,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:13,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 23:13:13,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1853, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:13:13,630 INFO L87 Difference]: Start difference. First operand 25752 states and 85069 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:16,058 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-06-05 23:13:25,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:25,716 INFO L93 Difference]: Finished difference Result 97493 states and 327125 transitions. [2021-06-05 23:13:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2021-06-05 23:13:25,716 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:13:25,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:25,901 INFO L225 Difference]: With dead ends: 97493 [2021-06-05 23:13:25,901 INFO L226 Difference]: Without dead ends: 93309 [2021-06-05 23:13:25,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27532 ImplicationChecksByTransitivity, 9989.3ms TimeCoverageRelationStatistics Valid=6915, Invalid=60425, Unknown=0, NotChecked=0, Total=67340 [2021-06-05 23:13:26,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93309 states. [2021-06-05 23:13:26,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93309 to 25720. [2021-06-05 23:13:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25720 states, 25719 states have (on average 3.3054551110074266) internal successors, (85013), 25719 states have internal predecessors, (85013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25720 states to 25720 states and 85013 transitions. [2021-06-05 23:13:26,696 INFO L78 Accepts]: Start accepts. Automaton has 25720 states and 85013 transitions. Word has length 54 [2021-06-05 23:13:26,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:26,696 INFO L482 AbstractCegarLoop]: Abstraction has 25720 states and 85013 transitions. [2021-06-05 23:13:26,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 25720 states and 85013 transitions. [2021-06-05 23:13:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:13:26,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:26,733 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:26,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 23:13:26,933 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:26,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1736363597, now seen corresponding path program 72 times [2021-06-05 23:13:26,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:26,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689613685] [2021-06-05 23:13:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:13:27,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:27,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689613685] [2021-06-05 23:13:27,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689613685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:27,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454888249] [2021-06-05 23:13:27,311 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:27,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:13:27,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:27,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:13:27,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:28,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:28,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,049 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 51 treesize of output 31 [2021-06-05 23:13:28,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:28,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:28,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:28,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:83, output treesize:42 [2021-06-05 23:13:28,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:28,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,169 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 38 treesize of output 18 [2021-06-05 23:13:28,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:28,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:28,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:28,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-06-05 23:13:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:28,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454888249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:28,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:28,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 23:13:28,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676542423] [2021-06-05 23:13:28,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 23:13:28,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:28,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 23:13:28,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1885, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:13:28,252 INFO L87 Difference]: Start difference. First operand 25720 states and 85013 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:29,064 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-06-05 23:13:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:39,785 INFO L93 Difference]: Finished difference Result 111560 states and 377221 transitions. [2021-06-05 23:13:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2021-06-05 23:13:39,786 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:13:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:40,015 INFO L225 Difference]: With dead ends: 111560 [2021-06-05 23:13:40,015 INFO L226 Difference]: Without dead ends: 106928 [2021-06-05 23:13:40,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23672 ImplicationChecksByTransitivity, 9320.4ms TimeCoverageRelationStatistics Valid=6280, Invalid=53500, Unknown=0, NotChecked=0, Total=59780 [2021-06-05 23:13:40,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106928 states. [2021-06-05 23:13:41,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106928 to 28580. [2021-06-05 23:13:41,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28580 states, 28579 states have (on average 3.298120997935547) internal successors, (94257), 28579 states have internal predecessors, (94257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:41,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28580 states to 28580 states and 94257 transitions. [2021-06-05 23:13:41,100 INFO L78 Accepts]: Start accepts. Automaton has 28580 states and 94257 transitions. Word has length 54 [2021-06-05 23:13:41,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:41,100 INFO L482 AbstractCegarLoop]: Abstraction has 28580 states and 94257 transitions. [2021-06-05 23:13:41,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:41,100 INFO L276 IsEmpty]: Start isEmpty. Operand 28580 states and 94257 transitions. [2021-06-05 23:13:41,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:13:41,139 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:41,139 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:41,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:41,340 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:41,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:41,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1006256589, now seen corresponding path program 73 times [2021-06-05 23:13:41,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:41,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642407228] [2021-06-05 23:13:41,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:13:41,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:41,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642407228] [2021-06-05 23:13:41,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642407228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:41,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012527245] [2021-06-05 23:13:41,725 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:41,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:13:41,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:42,631 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:13:42,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:13:42,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:42,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:42,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:42,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 23:13:42,765 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:13:42,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:13:42,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:42,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:42,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:42,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:13:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:42,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012527245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:42,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:42,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 47 [2021-06-05 23:13:42,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705442252] [2021-06-05 23:13:42,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:13:42,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:42,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:13:42,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1948, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:13:42,845 INFO L87 Difference]: Start difference. First operand 28580 states and 94257 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:55,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:55,988 INFO L93 Difference]: Finished difference Result 139761 states and 476557 transitions. [2021-06-05 23:13:55,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-06-05 23:13:55,988 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:13:55,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:56,282 INFO L225 Difference]: With dead ends: 139761 [2021-06-05 23:13:56,282 INFO L226 Difference]: Without dead ends: 135849 [2021-06-05 23:13:56,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31550 ImplicationChecksByTransitivity, 10766.9ms TimeCoverageRelationStatistics Valid=7909, Invalid=69653, Unknown=0, NotChecked=0, Total=77562 [2021-06-05 23:13:56,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135849 states. [2021-06-05 23:13:57,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135849 to 29800. [2021-06-05 23:13:57,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29800 states, 29799 states have (on average 3.3014195107218365) internal successors, (98379), 29799 states have internal predecessors, (98379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29800 states to 29800 states and 98379 transitions. [2021-06-05 23:13:57,665 INFO L78 Accepts]: Start accepts. Automaton has 29800 states and 98379 transitions. Word has length 54 [2021-06-05 23:13:57,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:57,665 INFO L482 AbstractCegarLoop]: Abstraction has 29800 states and 98379 transitions. [2021-06-05 23:13:57,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:57,666 INFO L276 IsEmpty]: Start isEmpty. Operand 29800 states and 98379 transitions. [2021-06-05 23:13:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:13:57,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:57,706 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:57,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:57,906 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:57,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:57,907 INFO L82 PathProgramCache]: Analyzing trace with hash 161882491, now seen corresponding path program 74 times [2021-06-05 23:13:57,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:57,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138951445] [2021-06-05 23:13:57,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:58,365 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-06-05 23:13:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:13:58,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:58,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138951445] [2021-06-05 23:13:58,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138951445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:58,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952895972] [2021-06-05 23:13:58,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:58,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:13:58,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:58,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:13:58,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:59,146 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:13:59,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:13:59,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:59,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:59,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:59,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 23:13:59,279 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:13:59,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:13:59,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:59,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:59,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:59,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:13:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:59,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952895972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:59,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:59,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 47 [2021-06-05 23:13:59,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552695615] [2021-06-05 23:13:59,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:13:59,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:59,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:13:59,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1951, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:13:59,358 INFO L87 Difference]: Start difference. First operand 29800 states and 98379 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:12,582 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-06-05 23:14:13,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:13,753 INFO L93 Difference]: Finished difference Result 150008 states and 507924 transitions. [2021-06-05 23:14:13,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2021-06-05 23:14:13,754 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:14:13,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:14,073 INFO L225 Difference]: With dead ends: 150008 [2021-06-05 23:14:14,073 INFO L226 Difference]: Without dead ends: 144407 [2021-06-05 23:14:14,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35935 ImplicationChecksByTransitivity, 11705.0ms TimeCoverageRelationStatistics Valid=9234, Invalid=76908, Unknown=0, NotChecked=0, Total=86142 [2021-06-05 23:14:14,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144407 states. [2021-06-05 23:14:15,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144407 to 36010. [2021-06-05 23:14:15,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36010 states, 36009 states have (on average 3.2882890388513983) internal successors, (118408), 36009 states have internal predecessors, (118408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36010 states to 36010 states and 118408 transitions. [2021-06-05 23:14:15,655 INFO L78 Accepts]: Start accepts. Automaton has 36010 states and 118408 transitions. Word has length 54 [2021-06-05 23:14:15,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:15,655 INFO L482 AbstractCegarLoop]: Abstraction has 36010 states and 118408 transitions. [2021-06-05 23:14:15,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:15,655 INFO L276 IsEmpty]: Start isEmpty. Operand 36010 states and 118408 transitions. [2021-06-05 23:14:15,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:14:15,835 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:15,835 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:16,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 23:14:16,045 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:16,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:16,045 INFO L82 PathProgramCache]: Analyzing trace with hash 256950145, now seen corresponding path program 75 times [2021-06-05 23:14:16,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:16,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417171698] [2021-06-05 23:14:16,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:16,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:16,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417171698] [2021-06-05 23:14:16,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417171698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:16,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409723873] [2021-06-05 23:14:16,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:16,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:14:16,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:16,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:14:16,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:17,163 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:14:17,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 23:14:17,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:17,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:17,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:17,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 23:14:17,336 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:14:17,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:14:17,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:17,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:17,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:17,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:14:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:17,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409723873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:17,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:17,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 48 [2021-06-05 23:14:17,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229388987] [2021-06-05 23:14:17,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 23:14:17,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:17,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 23:14:17,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:14:17,415 INFO L87 Difference]: Start difference. First operand 36010 states and 118408 transitions. Second operand has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:27,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:27,352 INFO L93 Difference]: Finished difference Result 110006 states and 367883 transitions. [2021-06-05 23:14:27,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2021-06-05 23:14:27,353 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:14:27,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:27,571 INFO L225 Difference]: With dead ends: 110006 [2021-06-05 23:14:27,571 INFO L226 Difference]: Without dead ends: 109166 [2021-06-05 23:14:27,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19483 ImplicationChecksByTransitivity, 7582.0ms TimeCoverageRelationStatistics Valid=5044, Invalid=45806, Unknown=0, NotChecked=0, Total=50850 [2021-06-05 23:14:27,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109166 states. [2021-06-05 23:14:28,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109166 to 36672. [2021-06-05 23:14:28,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36672 states, 36671 states have (on average 3.288838591802787) internal successors, (120605), 36671 states have internal predecessors, (120605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:28,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36672 states to 36672 states and 120605 transitions. [2021-06-05 23:14:28,756 INFO L78 Accepts]: Start accepts. Automaton has 36672 states and 120605 transitions. Word has length 54 [2021-06-05 23:14:28,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:28,756 INFO L482 AbstractCegarLoop]: Abstraction has 36672 states and 120605 transitions. [2021-06-05 23:14:28,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:28,756 INFO L276 IsEmpty]: Start isEmpty. Operand 36672 states and 120605 transitions. [2021-06-05 23:14:28,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:14:28,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:28,808 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:29,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:29,008 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:29,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:29,009 INFO L82 PathProgramCache]: Analyzing trace with hash -250373661, now seen corresponding path program 76 times [2021-06-05 23:14:29,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:29,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774869503] [2021-06-05 23:14:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:29,398 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-06-05 23:14:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:29,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:29,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774869503] [2021-06-05 23:14:29,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774869503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:29,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970002573] [2021-06-05 23:14:29,606 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:29,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:14:29,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:29,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:14:29,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:30,210 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:14:30,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 23:14:30,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:30,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:30,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:30,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 23:14:30,380 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:14:30,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 23:14:30,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:30,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:30,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:30,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 23:14:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:30,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970002573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:30,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:30,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 48 [2021-06-05 23:14:30,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331587298] [2021-06-05 23:14:30,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 23:14:30,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:30,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 23:14:30,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2043, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:14:30,458 INFO L87 Difference]: Start difference. First operand 36672 states and 120605 transitions. Second operand has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 23:14:42,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2021-06-05 23:14:42,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 23:14:42,837 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 23:14:42,839 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:14:42,840 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 23:14:42,840 INFO L202 PluginConnector]: Adding new model prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:14:42 BasicIcfg [2021-06-05 23:14:42,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:14:42,840 INFO L168 Benchmark]: Toolchain (without parser) took 752109.43 ms. Allocated memory was 371.2 MB in the beginning and 7.3 GB in the end (delta: 6.9 GB). Free memory was 350.7 MB in the beginning and 3.8 GB in the end (delta: -3.5 GB). Peak memory consumption was 3.4 GB. Max. memory is 16.0 GB. [2021-06-05 23:14:42,840 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 371.2 MB. Free memory is still 351.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:14:42,841 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.23 ms. Allocated memory is still 371.2 MB. Free memory was 350.6 MB in the beginning and 349.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:14:42,841 INFO L168 Benchmark]: Boogie Preprocessor took 18.04 ms. Allocated memory is still 371.2 MB. Free memory was 349.1 MB in the beginning and 348.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 23:14:42,841 INFO L168 Benchmark]: RCFGBuilder took 269.02 ms. Allocated memory is still 371.2 MB. Free memory was 348.1 MB in the beginning and 332.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 23:14:42,841 INFO L168 Benchmark]: TraceAbstraction took 751799.52 ms. Allocated memory was 371.2 MB in the beginning and 7.3 GB in the end (delta: 6.9 GB). Free memory was 332.4 MB in the beginning and 3.8 GB in the end (delta: -3.5 GB). Peak memory consumption was 3.4 GB. Max. memory is 16.0 GB. [2021-06-05 23:14:42,841 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 0.09 ms. Allocated memory is still 371.2 MB. Free memory is still 351.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.23 ms. Allocated memory is still 371.2 MB. Free memory was 350.6 MB in the beginning and 349.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.04 ms. Allocated memory is still 371.2 MB. Free memory was 349.1 MB in the beginning and 348.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 269.02 ms. Allocated memory is still 371.2 MB. Free memory was 348.1 MB in the beginning and 332.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 751799.52 ms. Allocated memory was 371.2 MB in the beginning and 7.3 GB in the end (delta: 6.9 GB). Free memory was 332.4 MB in the beginning and 3.8 GB in the end (delta: -3.5 GB). Peak memory consumption was 3.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (36672states) and FLOYD_HOARE automaton (currently 221 states, 48 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 265 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 61 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 751707.3ms, OverallIterations: 80, TraceHistogramMax: 3, EmptinessCheckTime: 1907.5ms, AutomataDifference: 614792.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 43.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8104 SDtfs, 96323 SDslu, 154972 SDs, 0 SdLazy, 317899 SolverSat, 28937 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 128769.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16524 GetRequests, 2509 SyntacticMatches, 155 SemanticMatches, 13859 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207129 ImplicationChecksByTransitivity, 473864.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36672occurred in iteration=79, InterpolantAutomatonStates: 11176, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 44483.2ms AutomataMinimizationTime, 79 MinimizatonAttempts, 3906608 StatesRemovedByMinimization, 75 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 424.1ms SsaConstructionTime, 1486.2ms SatisfiabilityAnalysisTime, 71296.4ms InterpolantComputationTime, 7546 NumberOfCodeBlocks, 7546 NumberOfCodeBlocksAsserted, 297 NumberOfCheckSat, 7390 ConstructedInterpolants, 52 QuantifiedInterpolants, 115411 SizeOfPredicates, 806 NumberOfNonLiveVariables, 10172 ConjunctsInSsa, 2657 ConjunctsInUnsatCore, 156 InterpolantComputations, 6 PerfectInterpolantSequences, 1082/4205 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